{"id":259,"date":"2025-06-27T23:48:07","date_gmt":"2025-06-27T15:48:07","guid":{"rendered":"https:\/\/www.bqmz001.top\/?p=259"},"modified":"2025-06-27T23:48:07","modified_gmt":"2025-06-27T15:48:07","slug":"flutter-%e7%bc%96%e8%be%91%e4%b8%80%e4%b8%aa%e7%ae%80%e5%8d%95%e7%9a%84%e8%af%a6%e6%83%85%e9%a1%b5","status":"publish","type":"post","link":"https:\/\/www.bqmz001.top\/index.php\/2025\/06\/27\/flutter-%e7%bc%96%e8%be%91%e4%b8%80%e4%b8%aa%e7%ae%80%e5%8d%95%e7%9a%84%e8%af%a6%e6%83%85%e9%a1%b5\/","title":{"rendered":"flutter \u7f16\u8f91\u4e00\u4e2a\u7b80\u5355\u7684\u8be6\u60c5\u9875"},"content":{"rendered":"

1\u3001\u5148\u8bf4StatelessWidget\u548cStatefulWidget\u4e4b\u4e89<\/h2>\n

\u6211\u8bb0\u5f97\u6700\u521d\u81ea\u5df1\u751f\u5543flutter\u7684\u65f6\u5019\uff0c\u53ea\u662f\u90a3\u4e9b\u6666\u6da9\u96be\u61c2\u7684\u201c\u5c3d\u91cf\u4f7f\u7528StatelessWidget\u201d\u201cStatefulWidget\u9002\u5408\u6709\u72b6\u6001\u7684\u7ec4\u4ef6\uff0cStatelessWidget\u9002\u5408\u65e0\u72b6\u6001\u7684\u7ec4\u4ef6\u201d\u2014\u2014\u5230\u5e95\u5565\u662f\u6240\u8c13\u7684\u201c\u6709\u72b6\u6001\u201d\u201c\u65e0\u72b6\u6001\u201d\uff1f
\u5f53\u7136\u6211\u73b0\u5728\u4e5f\u7406\u89e3\u4e0d\u5b8c\u5168\u554a\uff0c\u53ea\u662f\u77e5\u9053\u7c7b\u4f3c\u4e8eText\u4e4b\u7c7b\u7684\u7ec4\u4ef6\u662fStatelessWidget\uff0c\u5982\u679c\u9700\u8981\u6539\u53d8\u4e00\u4e9b\u4e1c\u897f\u5c31\u7528\u5916\u90e8\u72b6\u6001\uff08\u4f8b\u5982provider\u7684notifyListeners()<\/code>\uff09\u5237\u65b0\uff1b\u5982\u679c\u4f60\u5bf9\u8fd9\u4e2a\u7ec4\u4ef6\u6709\u4ec0\u4e48\u521a\u5f00\u59cb\u5c31\u8981\u5e72\u4ec0\u4e48\u4e8b\u60c5\u7684\u9700\u6c42\uff0c\u90a3\u5c31\u8981\u7528StatefulWidget\u3002
\u5927\u54e5\u4eec\u5982\u679c\u8ba4\u4e3a\u8fd9\u662f\u9519\u7684\uff0c\u6211\u9519\u4e86\uff01\u8f7b\u55b7<\/p>\n

2\u3001\u5148\u4ecemain.dart\u8df3\u8f6c\u5230\u90a3\u4e2a\u65b0\u7684\u9875\u9762<\/h2>\n

\u4e0a\u4ee3\u7801\uff01<\/p>\n

main.dart<\/h5>\n
import 'package:day06\/detail_page.dart';\nimport 'package:day06\/main_provider.dart';\nimport 'package:flutter\/material.dart';\nimport 'package:flutter_styled_toast\/flutter_styled_toast.dart';\nimport 'package:provider\/provider.dart';\n\nimport 'detail_provider.dart';\n\n\nvoid main() {\n  runApp(\n    MultiProvider(\n      providers: [ChangeNotifierProvider(create: (context) => MainProvider()),\n      ],\n\n      child: MyApp(),\n    ),\n  );\n}\n\nclass MyApp extends StatelessWidget {\n  const MyApp({super.key});\n\n  \/\/ This widget is the root of your application.\n  @override\n  Widget build(BuildContext context) {\n    return MaterialApp(\n      title: 'Flutter Demo',\n      theme: ThemeData(\n        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),\n      ),\n      home: const MyHomePage(title: 'Flutter Demo Home Page'),\n      \/\/ home: const DetailPage(),\n    );\n  }\n}\n\nclass MyHomePage extends StatelessWidget {\n  const MyHomePage({super.key, required this.title});\n\n  final String title;\n\n  @override\n  Widget build(BuildContext context) {\n    final provider = Provider.of<MainProvider>(context);\n\n    return Scaffold(\n      appBar: AppBar(\n        backgroundColor: Theme\n            .of(context)\n            .colorScheme\n            .inversePrimary,\n        title: Text(title),\n      ),\n      body: Center(\n        child: Column(\n          mainAxisAlignment: MainAxisAlignment.center,\n          children: <Widget>[\n            Text(provider.text),\n            ElevatedButton(\n              onPressed: provider.getList,\n              child: const Text('\u8bf7\u6c42\u6570\u636e'),\n            ),\n            ElevatedButton(\n              onPressed: () => provider.addContact(),\n              child: const Text('\u6dfb\u52a0\u4e00\u4e2a\u8054\u7cfb\u4eba'),\n            ),\n            Expanded(\n                child: RefreshIndicator(\n                  onRefresh: () async {\n                    \/\/ \u5237\u65b0\u65f6\u91cd\u7f6e\u9875\u7801\u5e76\u91cd\u65b0\u52a0\u8f7d\u6570\u636e\n                    provider.resetPage();\n                    await provider.getListPage(provider.pageNum);\n                  },\n                  child: NotificationListener<ScrollNotification>(\n                    onNotification: (scrollInfo){\n                      if (scrollInfo.metrics.pixels == scrollInfo.metrics.maxScrollExtent) {\n                        \/\/ \u6eda\u52a8\u5230\u5e95\u90e8\uff0c\u52a0\u8f7d\u4e0b\u4e00\u9875\n                        if(!provider.isLoading && !provider.finalPage){\n                          provider.addPage();\n                          provider.getListPage(provider.pageNum);\n                        }\n                      }\n                      return false;\n                    },\n                    child: ListView.builder(\n                      itemCount:provider.dataList.isEmpty? 0 : provider.dataList.length + 1,\n                      itemBuilder: (context, index) {\n                        if (index < provider.dataList.length) {\n                          return ListTile(\n                            title: Text('${provider.dataList[index].lastName} ${provider.dataList[index].firstName}'),\n                            subtitle: Text('${provider.dataList[index].phoneNumber}'),\n                            onTap: () async  {\n                              Navigator.of(context).push(\n                                MaterialPageRoute(\n                                  builder: (context) => DetailPage(id: provider.dataList[index].id),\n                                ),\n                              );\n                            },\n                          );\n                        } else {\n                          \/\/ \u663e\u793a\u52a0\u8f7d\u63d0\u793a\n                          return Center(child: provider.finalPage\n                              ? Text('\u6ca1\u6709\u66f4\u591a\u6570\u636e\u4e86')\n                              : CircularProgressIndicator()\n                          );\n                        }\n                      },\n                    ),\n                  ),\n                )\n            )\n          ],\n        ),\n      ),\n    );\n  }\n\n  Future<dynamic> showADialog(context,title,content){\n    return showDialog(\n        context: context,\n        builder: (context)=>AlertDialog(\n          title: Text(title),\n          content: Text(content),\n          actions: [\n            TextButton(\n              onPressed: () => Navigator.of(context).pop(3),\n              child: Text('\u67d0\u79cd\u4e2d\u7acb\u6309\u94ae\uff1f'),\n            ),\n            TextButton(\n              onPressed: () => Navigator.of(context).pop(2),\n              child: Text('\u53d6\u6d88'),\n            ),\n            TextButton(\n              onPressed: () => Navigator.of(context).pop(1),\n              child: Text('\u786e\u5b9a'),\n            ),\n          ],\n        )\n    );\n  }\n}\n<\/code><\/pre>\n
\u91cd\u70b9\u5728\u8fd9\u91cc\uff1a<\/p>\n
Navigator.of(context).push(\n  MaterialPageRoute(\n    builder: (context) => DetailPage(id: provider.dataList[index].id),\n  ),\n);\n<\/code><\/pre>\n
\u8fd9\u4e00\u622a\u610f\u601d\u5c31\u662f\u8bf4\u7528Navigator.of(context).push()<\/code>\u8df3\u8f6c\uff0cMaterialPageRoute()<\/code>\u63a7\u5236\u4e00\u4e9b\u8df3\u8f6c\u65f6\u7684\u53c2\u6570\uff08\u5177\u4f53\u63a7\u5236\u4ec0\u4e48\u81ea\u884c\u95ee\u641c\u7d22\u5f15\u64ce\uff09\uff0c\u7136\u540e\u5728builder\u5c5e\u6027\u91ccnew\u51fa\u65b0\u7684DetailPage\u9875\u9762\uff0c\u5e76\u4e14\u8981\u4f20\u5165\u4e00\u4e2aid\u53c2\u6570\uff08\u4e5f\u5c31\u662f\u8054\u7cfb\u4eba\u7684id\uff09\u3002\u5982\u679c\u4e0d\u60f3\u8003\u8651\u8fd9\u4e48\u591a\uff0c\u76f4\u63a5\u6284\u5c31\u5bf9\u4e86\uff01<\/p>\n
\n
\u90a3\u4e48\u65b0\u7684DetailPage\u73b0\u5728\u957f\u5565\u6837\u5462\uff1f<\/p>\n
detail_page.dart<\/h5>\n
import 'package:flutter\/material.dart';\nimport 'package:provider\/provider.dart';\nimport 'detail_provider.dart';\n\nclass DetailPage extends StatefulWidget {\n  final int? id; \n  const DetailPage({super.key, this.id});\n\n  @override\n  State<DetailPage> createState() => _DetailPageState();\n}\n\nclass _DetailPageState extends State<DetailPage> {\n \n  @override\n  Widget build(BuildContext context) {\n    return Scaffold(\n      appBar: AppBar(\n        title: const Text('\u8be6\u60c5'),\n      ),\n      body: Column(\n        children: [\n        \n        ],\n      ),\n    );\n  }\n\n  @override\n  void dispose() {\n    super.dispose();\n  }\n}\n<\/code><\/pre>\n
\u8fd9\u91cc\u7528StatefulWidget\u662f\u56e0\u4e3a\u4e00\u4f1a\u8981\u5728\u8fdb\u6765\u9875\u9762\u7684\u65f6\u5019\u8981\u52a0\u8f7d\u4e00\u4e9b\u4e1c\u897f\u2014\u2014\u4e5f\u5c31\u662f\u9700\u8981\u8fd9\u4e2a\u9875\u9762\u7684\u751f\u547d\u5468\u671f\u5566\uff01<\/p>\n
3\u3001\u7136\u540e\u518d\u5f80\u91cc\u9762\u586b\u5145\u4e00\u70b9\u6587\u672c\u6846\uff1f\u6574\u4e2a\u8fd4\u56de\u6309\u94ae\uff1f<\/h2>\n
import 'package:flutter\/material.dart';\nimport 'package:provider\/provider.dart';\nimport 'detail_provider.dart';\n\nclass DetailPage extends StatefulWidget {\n  final int? id; \n  const DetailPage({super.key, this.id});\n\n  @override\n  State<DetailPage> createState() => _DetailPageState();\n}\n\nclass _DetailPageState extends State<DetailPage> {\n \n  @override\n  Widget build(BuildContext context) {\n    return Scaffold(\n      appBar: AppBar(\n        title: const Text('\u8be6\u60c5'),\n        leading: GestureDetector(\n              onTap: () {\n                Navigator.of(context).pop();\n              },\n              child: const Icon(Icons.arrow_back_ios),\n            ),\n      ),\n      body: Column(\n        children: [\n        Padding(\n                padding: const EdgeInsets.symmetric(\n                    horizontal: 8, vertical: 16),\n                child: TextFormField(\n                  decoration: const InputDecoration(\n                    border: UnderlineInputBorder(),\n                    labelText: '\u59d3',\n                    floatingLabelBehavior: FloatingLabelBehavior\n                        .auto, \/\/ \u786e\u4fdd\u63d0\u793a\u6587\u5b57\u4e0d\u6d88\u5931\n                  ),\n                ),\n              ),\n\n              Padding(\n                padding: const EdgeInsets.symmetric(\n                    horizontal: 8, vertical: 16),\n                child: TextFormField(\n                  decoration: const InputDecoration(\n                    border: UnderlineInputBorder(),\n                    labelText: '\u540d',\n                    floatingLabelBehavior: FloatingLabelBehavior\n                        .auto, \/\/ \u786e\u4fdd\u63d0\u793a\u6587\u5b57\u4e0d\u6d88\u5931\n                  ),\n                ),\n              ),\n              Padding(\n                padding: const EdgeInsets.symmetric(\n                    horizontal: 8, vertical: 16),\n                child: TextFormField(\n                  decoration: const InputDecoration(\n                    border: UnderlineInputBorder(),\n                    labelText: '\u5e74\u9f84',\n                    floatingLabelBehavior: FloatingLabelBehavior\n                        .auto, \/\/ \u786e\u4fdd\u63d0\u793a\u6587\u5b57\u4e0d\u6d88\u5931\n                  ),\n                ),\n              ),\n              Padding(\n                padding: const EdgeInsets.symmetric(\n                    horizontal: 8, vertical: 16),\n                child: TextFormField(\n                  decoration: const InputDecoration(\n                    border: UnderlineInputBorder(),\n                    labelText: '\u6027\u522b',\n                    floatingLabelBehavior: FloatingLabelBehavior\n                        .auto, \/\/ \u786e\u4fdd\u63d0\u793a\u6587\u5b57\u4e0d\u6d88\u5931\n                  ),\n                ),\n              ),\n\n              Padding(\n                padding: const EdgeInsets.symmetric(\n                    horizontal: 8, vertical: 16),\n                child: TextFormField(\n                  decoration: const InputDecoration(\n                    border: UnderlineInputBorder(),\n                    labelText: '\u8054\u7cfb\u7535\u8bdd',\n                    floatingLabelBehavior: FloatingLabelBehavior\n                        .auto, \/\/ \u786e\u4fdd\u63d0\u793a\u6587\u5b57\u4e0d\u6d88\u5931\n                  ),\n                ),\n              ),\n              Padding(\n                padding: const EdgeInsets.symmetric(\n                    horizontal: 8, vertical: 16),\n                child: TextFormField(\n                  decoration: const InputDecoration(\n                    border: UnderlineInputBorder(),\n                    labelText: '\u5730\u5740',\n                    floatingLabelBehavior: FloatingLabelBehavior\n                        .auto, \/\/ \u786e\u4fdd\u63d0\u793a\u6587\u5b57\u4e0d\u6d88\u5931\n                  ),\n                ),\n              ),\n        ],\n      ),\n    );\n  }\n\n  @override\n  void dispose() {\n    super.dispose();\n  }\n}\n<\/code><\/pre>\n
\u8fd9\u6837\u9875\u9762\u4e5f\u6709\u4e86\uff0c\u8fd4\u56de\u6309\u94ae\u4e5f\u6709\u4e86\uff0c\u70b9\u4e0b\u90a3\u4e2a\u8fd4\u56de\u6309\u94ae\u5c31\u4f1a\u6267\u884cNavigator.of(context).pop()<\/code>\u8fd4\u56de\u4e0a\u4e00\u7ea7\u9875\u9762\u3002<\/p>\n
4\u3001\u73b0\u5728\u9875\u9762\u597d\u4e86\uff0c\u6570\u636e\u5462\uff1f\u4e0d\u5f97\u51c6\u5907\u4e00\u4e0b\uff1f<\/h2>\n
detail_provider.dart<\/h5>\n
import 'package:day06\/bean\/contact_bean.dart';\nimport 'package:flutter\/material.dart';\n\nimport 'bean\/base_bean.dart';\nimport 'dio_util.dart';\n\nclass DetailProvider with ChangeNotifier {\n  final TextEditingController firstName = TextEditingController();\n  final TextEditingController lastName = TextEditingController();\n  final TextEditingController age = TextEditingController();\n  final TextEditingController sex = TextEditingController();\n  final TextEditingController phoneNumber = TextEditingController();\n  final TextEditingController address = TextEditingController();\n\n  Future<void> getDetail(int id) async {\n    await DioUtil.getInstance().get(\n      "http:\/\/192.168.5.116:20080\/contact\/detail",\n      {'id': id},\n          () {\n\n      },\n          (data) {\n        BaseBean bean = BaseBean.fromJson(data);\n        var contact=ContactBean.fromJson(bean.data);\n        firstName.text=contact.firstName??'';\n        lastName.text=contact.lastName??'';\n        age.text=contact.age.toString();\n        sex.text=contact.sex==1?'\u7537':'\u5973';\n        phoneNumber.text=contact.phoneNumber??'';\n        address.text=contact.address??'';\n        notifyListeners();\n      },\n          (reason) {\n        notifyListeners();\n      },\n    );\n  }\n\n  @override\n  void dispose() {\n    firstName.dispose();\n    lastName.dispose();\n    age.dispose();\n    sex.dispose();\n    phoneNumber.dispose();\n    address.dispose();\n    \/\/ TODO: implement dispose\n    super.dispose();\n  }\n}\n<\/code><\/pre>\n
\u8fd9\u6837\u6570\u636e\u4e0d\u5c31\u6765\u4e86\u561b~
\u9996\u5148\u5efa\u4e86\u4e00\u5806TextEditingController\uff0c\u7528\u4e8e\u7ed1\u5b9a\u524d\u9762\u9875\u9762\u7684TextFormField\u2014\u2014\u8fd9\u6837\u5c31\u80fd\u83b7\u53d6\u5230UI\u90a3\u8fb9\u8f93\u5165\u7684\u5b57\u548c\u7ed9UI\u8d4b\u503c\u4e86\u3002\u7136\u540e\u7528getDetail\u4f20\u4e00\u4e2aid\u53c2\u6570\u8bf7\u6c42\u63a5\u53e3\u8fd4\u56de\u6765\u7ed9TextEditingController\u8d4b\u503c\u4ece\u800c\u8ba9\u524d\u7aef\u663e\u793a\u3002<\/p>\n
\u7136\u540eTextEditingController\u9700\u8981\u9500\u6bc1\uff0c\u6240\u4ee5\u9700\u8981\u91cd\u5199dispose()\u65b9\u6cd5\uff0c\u5728super.dispose()\u524d\u624b\u52a8\u6267\u884c\u4e00\u4e0b\u5404\u4e2aTextEditingController\u7684dispose()\u65b9\u6cd5\u3002<\/p>\n
5\u3001\u8ba9\u6570\u636e\u56de\u5230\u9875\u9762\uff01<\/h2>\n
\u63a5\u4e0b\u6765\u5c31\u662f\u8be5\u7ed1\u5b9a\u4e86\uff0c\u4f46\u662f\u63a5\u53e3\u5728\u54ea\u8c03\u7528\u5462\uff1f\u5b83\u8bb2\u9053\u7406\u662f\u6253\u5f00\u9875\u9762\u540e\u5c31\u8c03\u7528\u554a~\u603b\u4e0d\u53ef\u80fd\u70b9\u8fdb\u8be6\u60c5\u8fd8\u8981\u518d\u6309\u4e2a\u6309\u94ae\u5427\u3002
\u8fd8\u6709\u8fd9\u662f\u4e2a\u8be6\u60c5\u9875\u9762\uff0c\u6211\u4e0d\u60f3\u8ba9\u8fd9\u4e9b\u8f93\u5165\u6846\u53ef\u4ee5\u7f16\u8f91\u3002
\u90a3\u5c31\u6539\u4e00\u4e0b\u5427<\/p>\n
detail_page.dart<\/h5>\n
import 'package:flutter\/material.dart';\nimport 'package:provider\/provider.dart';\nimport 'detail_provider.dart';\n\nclass DetailPage extends StatefulWidget {\n  final int? id; \n  const DetailPage({super.key, this.id});\n\n  @override\n  State<DetailPage> createState() => _DetailPageState();\n}\n\nclass _DetailPageState extends State<DetailPage> {\n  @override\n  void initState() {\n    super.initState();\n    final detailProvider = Provider.of<DetailProvider>(context, listen: false);\n    if (widget.id != null) {\n      detailProvider.getDetail(widget.id!);\n    }\n  }\n\n  @override\n  Widget build(BuildContext context) {\n    final detailProvider = Provider.of<DetailProvider>(context);\n    return Scaffold(\n      appBar: AppBar(\n        title: const Text('\u8be6\u60c5'),\n        leading: GestureDetector(\n              onTap: () {\n                Navigator.of(context).pop();\n              },\n              child: const Icon(Icons.arrow_back_ios),\n            ),\n      ),\n      body: Column(\n        children: [\n              Padding(\n                padding: const EdgeInsets.symmetric(\n                    horizontal: 8, vertical: 16),\n                child: TextFormField(\n                  readOnly: true,\n                  controller: detailProvider.lastName,\n                  decoration: const InputDecoration(\n                    border: UnderlineInputBorder(),\n                    labelText: '\u59d3',\n                    floatingLabelBehavior: FloatingLabelBehavior\n                        .auto, \/\/ \u786e\u4fdd\u63d0\u793a\u6587\u5b57\u4e0d\u6d88\u5931\n                  ),\n                ),\n              ),\n\n              Padding(\n                padding: const EdgeInsets.symmetric(\n                    horizontal: 8, vertical: 16),\n                child: TextFormField(\n                  readOnly: true,\n                  controller: detailProvider.firstName,\n                  decoration: const InputDecoration(\n                    border: UnderlineInputBorder(),\n                    labelText: '\u540d',\n                    floatingLabelBehavior: FloatingLabelBehavior\n                        .auto, \/\/ \u786e\u4fdd\u63d0\u793a\u6587\u5b57\u4e0d\u6d88\u5931\n                  ),\n                ),\n              ),\n              Padding(\n                padding: const EdgeInsets.symmetric(\n                    horizontal: 8, vertical: 16),\n                child: TextFormField(\n                  readOnly: true,\n                  controller: detailProvider.age,\n                  decoration: const InputDecoration(\n                    border: UnderlineInputBorder(),\n                    labelText: '\u5e74\u9f84',\n                    floatingLabelBehavior: FloatingLabelBehavior\n                        .auto, \/\/ \u786e\u4fdd\u63d0\u793a\u6587\u5b57\u4e0d\u6d88\u5931\n                  ),\n                ),\n              ),\n              Padding(\n                padding: const EdgeInsets.symmetric(\n                    horizontal: 8, vertical: 16),\n                child: TextFormField(\n                  readOnly: true,\n                  controller: detailProvider.sex,\n                  decoration: const InputDecoration(\n                    border: UnderlineInputBorder(),\n                    labelText: '\u6027\u522b',\n                    floatingLabelBehavior: FloatingLabelBehavior\n                        .auto, \/\/ \u786e\u4fdd\u63d0\u793a\u6587\u5b57\u4e0d\u6d88\u5931\n                  ),\n                ),\n              ),\n\n              Padding(\n                padding: const EdgeInsets.symmetric(\n                    horizontal: 8, vertical: 16),\n                child: TextFormField(\n                  readOnly: true,\n                  controller: detailProvider.phoneNumber,\n                  decoration: const InputDecoration(\n                    border: UnderlineInputBorder(),\n                    labelText: '\u8054\u7cfb\u7535\u8bdd',\n                    floatingLabelBehavior: FloatingLabelBehavior\n                        .auto, \/\/ \u786e\u4fdd\u63d0\u793a\u6587\u5b57\u4e0d\u6d88\u5931\n                  ),\n                ),\n              ),\n              Padding(\n                padding: const EdgeInsets.symmetric(\n                    horizontal: 8, vertical: 16),\n                child: TextFormField(\n                  readOnly: true,\n                  controller: detailProvider.address,\n                  decoration: const InputDecoration(\n                    border: UnderlineInputBorder(),\n                    labelText: '\u5730\u5740',\n                    floatingLabelBehavior: FloatingLabelBehavior\n                        .auto, \/\/ \u786e\u4fdd\u63d0\u793a\u6587\u5b57\u4e0d\u6d88\u5931\n                  ),\n                ),\n              ),\n        ],\n      ),\n    );\n  }\n\n  @override\n  void dispose() {\n    super.dispose();\n  }\n}\n<\/code><\/pre>\n
\u81f3\u4e8e\u8f93\u5165\u6846\u6539\u4e3a\u4e0d\u53ef\u7f16\u8f91\u7684\u95ee\u9898\uff0c\u5176\u5b9e\u8fd9\u91cc\u6709\u4e24\u79cd\u529e\u6cd5\uff1aenabled<\/code>\u548creadOnly<\/code>\uff0c\u524d\u8005\u4e3afalse\u7684\u8bdd\u771f\u5c31\u53ea\u80fd\u770b\uff0c\u989c\u8272\u7f6e\u7070\uff1b\u4f46\u540e\u8005\u867d\u7136\u4e0d\u80fd\u7f16\u8f91\u4f46\u989c\u8272\u662f\u6b63\u5e38\u7684\uff0c\u751a\u81f3\u53ef\u4ee5\u590d\u5236\u3002\u6240\u4ee5\u518d\u8fd9\u8fb9\u7528\u7684\u662freadOnly\u3002
\u4ee3\u7801\u91cc\u6240\u6709\u7684TextFormField\u90fd\u7ed1\u5b9a\u4e86\u6765\u81ea\u4e8eProvider\u7684\u5c5e\u4e8e\u5404\u81ea\u7684controller\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u6b63\u5e38\u663e\u793a\u5404\u81ea\u7684\u6587\u5b57\u4e86\u3002
\u81f3\u4e8e\u5982\u4f55\u5728\u6253\u5f00\u9875\u9762\u7684\u65f6\u5019\u5c31\u8c03\u7528\u63a5\u53e3\u62ff\u6570\u636e\uff0c\u90a3\u5c31\u5f97\u91cd\u5199_DetailPageState<\/code>\u7684initState()<\/code>\u65b9\u6cd5\u3002<\/p>\n
  @override\n  void initState() {\n    super.initState();\n    final detailProvider = Provider.of<DetailProvider>(context, listen: false);\n    if (widget.id != null) {\n      detailProvider.getDetail(widget.id!);\n    }\n  }\n<\/code><\/pre>\n
\u90a3\u5c31\u8be5\u6709\u4eba\u95ee\u4e86\uff1a\u4e3a\u5565\u53c8\u5728\u8fd9\u91cc\u5f15\u7528\u4e86provider\uff1f\u505a\u5168\u5c40\u53d8\u91cf\u4e0d\u597d\u5417\uff1f
\u770b\u89c1\u90a3\u4e2alisten: false<\/code>\u4e86\u6ca1\uff1f\u5199\u4e86\u8fd9\u4e2a\u5c31\u53ef\u4ee5\u4e0d\u7528\u76d1\u542c\u72b6\u6001\u53d8\u5316\uff0c\u6211\u5728\u8fd9\u521d\u59cb\u5316\u6570\u636e\u4e3a\u5565\u8981\u76d1\u542c\u72b6\u6001\u53d8\u5316\u5462\u5bf9\u5427\u3002\u7701\u7684\u6ca1\u4e8b\u5168\u5c40\u89e6\u53d1build()\u5bfc\u81f4\u989d\u5916\u65e0\u7528\u7684\u5237\u65b0\u3002<\/p>\n
\u6574\u5230\u73b0\u5728\u5e94\u8be5\u662f\u80fd\u770b\u6ca1\u5565\u95ee\u9898\u4e86<\/strong> <\/p>\n
6\u3001\u65b0\u7684\u95ee\u9898\u6765\u4e86\uff1a\u600e\u4e48\u770b\u8be6\u60c5\u8fd8\u80fd\u770b\u51fa\u6b8b\u5f71\uff1f<\/h2>\n
\u73b0\u5728\u70b9\u8fdb\u53bb\u7b2c\u4e00\u4e2a\uff0c\u52a0\u8f7d\u6b63\u5e38\uff0c\u8fd4\u56de\u6765\uff0c\u518d\u70b9\u8fdb\u53bb\u7b2c\u4e8c\u4e2a\uff0c\u600e\u4e48\u4f1a\u51fa\u73b0\u7b2c\u4e00\u4e2a\u7684\u6570\u636e\uff1f\uff1f\uff1f
\u90a3\u5c31\u5f97\u6709\u4e2a\u6e05\u7406\u7684\u65b9\u6cd5\u63d2\u5728provider\u91cc\u4e86\uff1a<\/p>\n
void clearData() {\n    lastName.clear();\n    firstName.clear();\n    age.clear();\n    sex.clear();\n    phoneNumber.clear();\n    address.clear();\n    notifyListeners(); \/\/ \u901a\u77e5\u76d1\u542c\u5668\u72b6\u6001\u6539\u53d8\n  }\n<\/code><\/pre>\n
\u63d2\u8fdb\u53bb\u65b9\u6cd5\u5c31\u5728\u8fd4\u56de\u7684\u65f6\u5019\u6e05\u7406\u6389\uff1a
\u7b2c\u4e00\u4e2a\u6ce8\u610f\u7684\u5730\u65b9\u5c31\u662f\u6309\u4e0b\u9875\u9762\u5de6\u4e0a\u89d2\u8fd4\u56de\u6309\u94ae\u7684\u65f6\u5019
\u7b2c\u4e8c\u4e2a\u5c31\u662fAndroid\u7684\u8fd4\u56de\u952e\uff08\u8c01\u8ba9\u6211\u662f\u4e2a\u5b89\u5353\u5f00\u53d1\uff09
\u6240\u4ee5UI\u4ee3\u7801\u73b0\u5728\u5c31\u53d8\u6210\u8fd9\u6837\uff1a<\/p>\n
detail_page.dart<\/h5>\n
import 'package:flutter\/material.dart';\nimport 'package:provider\/provider.dart';\nimport 'detail_provider.dart';\n\nclass DetailPage extends StatefulWidget {\n  final int? id; \/\/ \u793a\u4f8b\u53c2\u6570\uff0c\u53ef\u6309\u9700\u4fee\u6539\n  const DetailPage({super.key, this.id});\n\n  @override\n  State<DetailPage> createState() => _DetailPageState();\n}\n\nclass _DetailPageState extends State<DetailPage> {\n  @override\n  void initState() {\n    super.initState();\n    final detailProvider = Provider.of<DetailProvider>(context, listen: false);\n    if (widget.id != null) {\n      detailProvider.getDetail(widget.id!);\n    }\n  }\n\n  @override\n  Widget build(BuildContext context) {\n    final detailProvider = Provider.of<DetailProvider>(context);\n    return PopScope(\n        onPopInvokedWithResult: (didPop, result) {\n          detailProvider.clearData();\n        },\n        child: Scaffold(\n          appBar: AppBar(\n            title: const Text('\u8be6\u60c5'),\n            leading: GestureDetector(\n              onTap: () {\n                detailProvider.clearData();\n                Navigator.of(context).pop();\n              },\n              child: const Icon(Icons.arrow_back_ios),\n            ),\n          ),\n          body: Column(\n            crossAxisAlignment: CrossAxisAlignment.start,\n            children: [\n              \/\/ \u5df2\u6709\u8f93\u5165\u6846\n              Padding(\n                padding: const EdgeInsets.symmetric(\n                    horizontal: 8, vertical: 16),\n                child: TextFormField(\n                  readOnly: true,\n                  controller: detailProvider.lastName,\n                  decoration: const InputDecoration(\n                    border: UnderlineInputBorder(),\n                    labelText: '\u59d3',\n                    floatingLabelBehavior: FloatingLabelBehavior\n                        .auto, \/\/ \u786e\u4fdd\u63d0\u793a\u6587\u5b57\u4e0d\u6d88\u5931\n                  ),\n                ),\n              ),\n\n              Padding(\n                padding: const EdgeInsets.symmetric(\n                    horizontal: 8, vertical: 16),\n                child: TextFormField(\n                  readOnly: true,\n                  controller: detailProvider.firstName,\n                  decoration: const InputDecoration(\n                    border: UnderlineInputBorder(),\n                    labelText: '\u540d',\n                    floatingLabelBehavior: FloatingLabelBehavior\n                        .auto, \/\/ \u786e\u4fdd\u63d0\u793a\u6587\u5b57\u4e0d\u6d88\u5931\n                  ),\n                ),\n              ),\n              Padding(\n                padding: const EdgeInsets.symmetric(\n                    horizontal: 8, vertical: 16),\n                child: TextFormField(\n                  readOnly: true,\n                  controller: detailProvider.age,\n                  decoration: const InputDecoration(\n                    border: UnderlineInputBorder(),\n                    labelText: '\u5e74\u9f84',\n                    floatingLabelBehavior: FloatingLabelBehavior\n                        .auto, \/\/ \u786e\u4fdd\u63d0\u793a\u6587\u5b57\u4e0d\u6d88\u5931\n                  ),\n                ),\n              ),\n              Padding(\n                padding: const EdgeInsets.symmetric(\n                    horizontal: 8, vertical: 16),\n                child: TextFormField(\n                  readOnly: true,\n                  controller: detailProvider.sex,\n                  decoration: const InputDecoration(\n                    border: UnderlineInputBorder(),\n                    labelText: '\u6027\u522b',\n                    floatingLabelBehavior: FloatingLabelBehavior\n                        .auto, \/\/ \u786e\u4fdd\u63d0\u793a\u6587\u5b57\u4e0d\u6d88\u5931\n                  ),\n                ),\n              ),\n\n              Padding(\n                padding: const EdgeInsets.symmetric(\n                    horizontal: 8, vertical: 16),\n                child: TextFormField(\n                  readOnly: true,\n                  controller: detailProvider.phoneNumber,\n                  decoration: const InputDecoration(\n                    border: UnderlineInputBorder(),\n                    labelText: '\u8054\u7cfb\u7535\u8bdd',\n                    floatingLabelBehavior: FloatingLabelBehavior\n                        .auto, \/\/ \u786e\u4fdd\u63d0\u793a\u6587\u5b57\u4e0d\u6d88\u5931\n                  ),\n                ),\n              ),\n              Padding(\n                padding: const EdgeInsets.symmetric(\n                    horizontal: 8, vertical: 16),\n                child: TextFormField(\n                  readOnly: true,\n                  controller: detailProvider.address,\n                  decoration: const InputDecoration(\n                    border: UnderlineInputBorder(),\n                    labelText: '\u5730\u5740',\n                    floatingLabelBehavior: FloatingLabelBehavior\n                        .auto, \/\/ \u786e\u4fdd\u63d0\u793a\u6587\u5b57\u4e0d\u6d88\u5931\n                  ),\n                ),\n              ),\n\n            ],\n          ),\n        )\n    );\n  }\n\n  @override\n  void dispose() {\n    super.dispose();\n  }\n}\n<\/code><\/pre>\n
\u7b2c\u4e00\u4e2a\u662f\u5728\u8fd4\u56de\u6309\u94ae\uff08appBar<\/code>\u7684leading<\/code>\u5c5e\u6027\u91cc\uff09\u90a3\u624b\u52a8\u8c03\u7528\u4e00\u4e0bclearData()<\/code>\u65b9\u6cd5\uff0c\u7b2c\u4e8c\u4e2a\u76d1\u542c\u5b89\u5353\u8fd4\u56de\u6309\u94ae\u7684\u529e\u6cd5\u5c31\u662f\u7528PopScope<\/code>\u5305\u88f9Scaffold<\/code>,\u5728PopScope\u7684onPopInvokedWithResult<\/code>\u51fd\u6570\u91cc\u624b\u52a8\u6e05\u7406\u4e00\u4e0b\u4e5f\u5c31OK\u4e86\u3002<\/p>\n
7\u3001\u5230\u6700\u540e\u4e86\uff0c\u9001\u4e2a\u72b6\u6001\u5457~\u7ed9\u4e2a\u52a0\u8f7d\u4e2d\u72b6\u6001\u548c\u52a0\u8f7d\u5931\u8d25\u4e86\u5c55\u793a\u539f\u56e0\u548c\u5237\u65b0<\/h2>\n
\u4e0d\u591a\u5570\u55e6\u4e0a\u4ee3\u7801\uff01<\/p>\n
detail_pge.dart<\/h5>\n
import 'package:flutter\/material.dart';\nimport 'package:provider\/provider.dart';\nimport 'detail_provider.dart';\n\nclass DetailPage extends StatefulWidget {\n  final int? id; \/\/ \u793a\u4f8b\u53c2\u6570\uff0c\u53ef\u6309\u9700\u4fee\u6539\n  const DetailPage({super.key, this.id});\n\n  @override\n  State<DetailPage> createState() => _DetailPageState();\n}\n\nclass _DetailPageState extends State<DetailPage> {\n  @override\n  void initState() {\n    super.initState();\n    final detailProvider = Provider.of<DetailProvider>(context, listen: false);\n    \/\/ \u8c03\u7528\u7f51\u7edc\u8bf7\u6c42\uff0c\u8fd9\u91cc\u5047\u8bbe DetailProvider \u6709 fetchData \u65b9\u6cd5\n    if (widget.id != null) {\n      detailProvider.getDetail(widget.id!);\n    }\n  }\n\n  @override\n  Widget build(BuildContext context) {\n    final detailProvider = Provider.of<DetailProvider>(context);\n\n    return PopScope(\n      onPopInvokedWithResult: (didPop, result) {\n        detailProvider.clearData();\n      },\n      child: Scaffold(\n        appBar: AppBar(\n          title: const Text('\u8be6\u60c5'),\n          leading: GestureDetector(\n            onTap: () {\n              detailProvider.clearData();\n              Navigator.of(context).pop();\n            },\n            child: const Icon(Icons.arrow_back_ios),\n          ),\n        ),\n        body: Center(\n          child: detailProvider.isLoading\n              ? Column(\n                  mainAxisAlignment: MainAxisAlignment.center,\n                  children: const [\n                    Text('\u6b63\u5728\u52a0\u8f7d...'),\n                    SizedBox(height: 16),\n                    CircularProgressIndicator(),\n                  ],\n                )\n              : detailProvider.error != null\n              ? Column(\n                  mainAxisAlignment: MainAxisAlignment.center,\n                  children: [\n                    Text(detailProvider.error!),\n                    const SizedBox(height: 16),\n                    ElevatedButton(\n                      onPressed: () {\n                        if (widget.id != null) {\n                          detailProvider.getDetail(widget.id!);\n                        }\n                      },\n                      child: const Text('\u70b9\u51fb\u5237\u65b0'),\n                    ),\n                  ],\n                )\n              : Column(\n                  crossAxisAlignment: CrossAxisAlignment.start,\n                  children: [\n                    \/\/ \u5df2\u6709\u8f93\u5165\u6846\n                    Padding(\n                      padding: const EdgeInsets.symmetric(\n                        horizontal: 8,\n                        vertical: 16,\n                      ),\n                      child: TextFormField(\n                        readOnly: true,\n                        controller: detailProvider.lastName,\n                        decoration: const InputDecoration(\n                          border: UnderlineInputBorder(),\n                          labelText: '\u59d3',\n                          floatingLabelBehavior:\n                              FloatingLabelBehavior.auto, \/\/ \u786e\u4fdd\u63d0\u793a\u6587\u5b57\u4e0d\u6d88\u5931\n                        ),\n                      ),\n                    ),\n\n                    Padding(\n                      padding: const EdgeInsets.symmetric(\n                        horizontal: 8,\n                        vertical: 16,\n                      ),\n                      child: TextFormField(\n                        readOnly: true,\n                        controller: detailProvider.firstName,\n                        decoration: const InputDecoration(\n                          border: UnderlineInputBorder(),\n                          labelText: '\u540d',\n                          floatingLabelBehavior:\n                              FloatingLabelBehavior.auto, \/\/ \u786e\u4fdd\u63d0\u793a\u6587\u5b57\u4e0d\u6d88\u5931\n                        ),\n                      ),\n                    ),\n                    Padding(\n                      padding: const EdgeInsets.symmetric(\n                        horizontal: 8,\n                        vertical: 16,\n                      ),\n                      child: TextFormField(\n                        readOnly: true,\n                        controller: detailProvider.age,\n                        decoration: const InputDecoration(\n                          border: UnderlineInputBorder(),\n                          labelText: '\u5e74\u9f84',\n                          floatingLabelBehavior:\n                              FloatingLabelBehavior.auto, \/\/ \u786e\u4fdd\u63d0\u793a\u6587\u5b57\u4e0d\u6d88\u5931\n                        ),\n                      ),\n                    ),\n                    Padding(\n                      padding: const EdgeInsets.symmetric(\n                        horizontal: 8,\n                        vertical: 16,\n                      ),\n                      child: TextFormField(\n                        readOnly: true,\n                        controller: detailProvider.sex,\n                        decoration: const InputDecoration(\n                          border: UnderlineInputBorder(),\n                          labelText: '\u6027\u522b',\n                          floatingLabelBehavior:\n                              FloatingLabelBehavior.auto, \/\/ \u786e\u4fdd\u63d0\u793a\u6587\u5b57\u4e0d\u6d88\u5931\n                        ),\n                      ),\n                    ),\n\n                    Padding(\n                      padding: const EdgeInsets.symmetric(\n                        horizontal: 8,\n                        vertical: 16,\n                      ),\n                      child: TextFormField(\n                        readOnly: true,\n                        controller: detailProvider.phoneNumber,\n                        decoration: const InputDecoration(\n                          border: UnderlineInputBorder(),\n                          labelText: '\u8054\u7cfb\u7535\u8bdd',\n                          floatingLabelBehavior:\n                              FloatingLabelBehavior.auto, \/\/ \u786e\u4fdd\u63d0\u793a\u6587\u5b57\u4e0d\u6d88\u5931\n                        ),\n                      ),\n                    ),\n\n                    \/\/ \u65b0\u589e\u8f93\u5165\u6846\n                    Padding(\n                      padding: const EdgeInsets.symmetric(\n                        horizontal: 8,\n                        vertical: 16,\n                      ),\n                      child: TextFormField(\n                        readOnly: true,\n                        controller: detailProvider.address,\n                        decoration: const InputDecoration(\n                          border: UnderlineInputBorder(),\n                          labelText: '\u5730\u5740',\n                          floatingLabelBehavior:\n                              FloatingLabelBehavior.auto, \/\/ \u786e\u4fdd\u63d0\u793a\u6587\u5b57\u4e0d\u6d88\u5931\n                        ),\n                      ),\n                    ),\n                  ],\n                ),\n        ),\n      ),\n    );\n  }\n\n  @override\n  void dispose() {\n    super.dispose();\n  }\n}\n<\/code><\/pre>\n
detail_provider.dart<\/h5>\n
import 'package:day06\/bean\/contact_bean.dart';\nimport 'package:flutter\/material.dart';\n\nimport 'bean\/base_bean.dart';\nimport 'dio_util.dart';\n\nclass DetailProvider with ChangeNotifier {\n  final TextEditingController firstName = TextEditingController();\n  final TextEditingController lastName = TextEditingController();\n  final TextEditingController age = TextEditingController();\n  final TextEditingController sex = TextEditingController();\n  final TextEditingController phoneNumber = TextEditingController();\n  final TextEditingController address = TextEditingController();\n\n  bool _isLoading = false;\n\n  bool get isLoading => _isLoading;\n  String? _error;\n\n  String? get error => _error;\n\n  Future<void> getDetail(int id) async {\n    _error = null;\n    await DioUtil.getInstance().get(\n      "http:\/\/192.168.5.116:20080\/contact\/detail",\n      {'id': id},\n      () {\n        _isLoading = true;\n        notifyListeners();\n      },\n      (data) {\n        _isLoading = false;\n        BaseBean bean = BaseBean.fromJson(data);\n        var contact = ContactBean.fromJson(bean.data);\n        firstName.text = contact.firstName ?? '';\n        lastName.text = contact.lastName ?? '';\n        age.text = contact.age.toString();\n        sex.text = contact.sex == 1 ? '\u7537' : '\u5973';\n        phoneNumber.text = contact.phoneNumber ?? '';\n        address.text = contact.address ?? '';\n        notifyListeners();\n      },\n      (reason) {\n        _isLoading = false;\n        _error = reason;\n        notifyListeners();\n      },\n    );\n  }\n\n  void clearData() {\n    lastName.clear();\n    firstName.clear();\n    age.clear();\n    sex.clear();\n    phoneNumber.clear();\n    address.clear();\n    notifyListeners(); \/\/ \u901a\u77e5\u76d1\u542c\u5668\u72b6\u6001\u6539\u53d8\n  }\n\n  @override\n  void dispose() {\n    firstName.dispose();\n    lastName.dispose();\n    age.dispose();\n    sex.dispose();\n    phoneNumber.dispose();\n    address.dispose();\n    \/\/ TODO: implement dispose\n    super.dispose();\n  }\n}\n<\/code><\/pre>\n
\u6ca1\u5565\u53ef\u8bf4\u7684\uff0c\u5c31\u662f\u52a0\u4e86\u4e2aisLoading\u548cerror\uff0c\u5f53\u524d\u7aefisLoading\u7684\u65f6\u5019\u8f6c\u5708\uff0c\u8f6c\u5b8c\u4e86\u6709\u6570\u636e\u5c55\u793a\u6570\u636e\uff0c\u62a5\u9519\u5c31\u5c55\u793a\u9519\u8bef\u539f\u56e0\u5457~<\/p>\n","protected":false},"excerpt":{"rendered":"
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