\u5176\u5b9e\u8be6\u60c5\u9875\uff0c\u5c31\u6709\u70b9\u7f16\u8f91\u7684\u610f\u5473\u4e86~
\u6240\u4ee5\u7f16\u8f91\u9875\u5c31\u662f\u8be6\u60c5\u9875\u6539\u51fa\u6765\u7684\uff01
\u6539\u4e86\u70b9\u5565\uff0c\u5176\u5b9e\u4e5f\u6709\u8bf4\u7684\u3002<\/p>\n
\/\/\u4e0a\u65b9\u5b9a\u4e49\u6027\u522b\u9009\u9879\n final List<Map<String, dynamic>> genderOptions = [\n {'value': 0, 'label': '\u5973'},\n {'value': 1, 'label': '\u7537'},\n ];\n\n......\n\/\/\u4e0b\u9762Widget\u91cc\u8fd9\u4e48\u73a9\uff1a\nchild: DropdownButtonFormField<int>(\n value: editProvider.contact?.sex,\n items: genderOptions.map((option) {\n return DropdownMenuItem<int>(\n value: option['value'],\n child: Text(option['label']),\n );\n }).toList(),\n onChanged: (int? newValue) {\n if (newValue != null) {\n editProvider.contact?.sex = newValue;\n }\n },\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<\/code><\/pre>\n\u524d\u7aef\u540c\u5b66\u8c8c\u4f3c\u6bd4\u8f83\u719f\u6089\u7c7b\u4f3c\u7684\u73a9\u6cd5\u3002<\/p>\n
\u770b\u5230\u8fd9\u6709\u4eba\u4f1a\u8bf4\u662f\uff1a\u6570\u636e\u4ece\u54ea\u5192\u51fa\u6765\uff1f<\/p>\n
2\u3001provider\u4e2d\u5bf9\u8c61\u7684\u6539\u52a8<\/h2>\n\/\/\u76f4\u63a5\u6709\u4e00\u4e2a\u66b4\u9732\u51fa\u6765\u7684\u5bf9\u8c61\nContactBean? contact;\n\n\/\/\u7136\u540e\u5728\u8c03\u7528\u63a5\u53e3\u7684\u65f6\u5019\u4e5f\u4f1a\u5c06\u6570\u636e\u76f4\u63a5\u8f6c\u6362\u4e3a\u5bf9\u8c61\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 this.contact = contact;\n firstName.text = contact.firstName ?? '';\n lastName.text = contact.lastName ?? '';\n age.text = contact.age.toString();\n\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<\/code><\/pre>\n\u518d\u52a0\u4e0aTextFormField\u7684onChange\u4e8b\u4ef6\uff0c\u6570\u636e\u548c\u6539\u52a8\u76f4\u63a5\u8d4b\u503c\u7ed9\u8fd9\u4e2a\u5bf9\u8c61\uff0c\u64cd\u4f5c\u8d77\u6765\u4e5f\u65b9\u4fbf\u591a\u4e86\u3002<\/p>\n
\u756a\u5916\u63d2\u64ad\uff1aThis _InheritedProviderScope<EditProvider?> widget cannot be marked as needing to build because the framework is already in the process of building widgets.<\/code>\u7684\u62a5\u9519\u5904\u7406<\/h2>\n\u4eba\u8bdd\uff1a\u6211UI\u8fd8\u6ca1\u6784\u5efa\u6570\u636e\u5c31\u54cd\u5e94\u56de\u6765\u4e86\uff01\u6211\u8fd8\u6ca1\u4e1c\u897f\u5462\u81ea\u52a8\u5237\u65b0\u5565\u73a9\u610f\u554a\uff1f
\u89e3\u51b3\u529e\u6cd5\uff1aWidgetsBinding.instance.addPostFrameCallback<\/code>
\u5728StatefulWidget\u91cc\u7684State\u79c1\u6709\u7c7b\u7684initState\u65b9\u6cd5\u91cc\u7167\u4e0b\u9762\u65b9\u6cd5\u52a0\u4e0a\uff0c\u53ef\u786e\u4fdd\u7ec4\u4ef6\u52a0\u8f7d\u5b8c\u6210\u540e\u518d\u8c03\u7528\u5237\u65b0\u6570\u636e\u7684\u529e\u6cd5\uff0c\u8fd9\u6837\u81ea\u52a8\u5237\u65b0\u4e5f\u6709\u7684\u5237\u554a\uff01\u5b85\u5c11\u4e0d\u4f1a\u8ba9UI\u5c2c\u4f4f\u4e0d\u723d\u7ed9\u4f60\u62a5\u4e2a\u9519\u3002<\/p>\n @override\n void initState() {\n super.initState();\n WidgetsBinding.instance.addPostFrameCallback((_) {\n final editProvider = Provider.of<EditProvider>(context, listen: false);\n if (widget.id != null) {\n editProvider.getDetail(widget.id!);\n }\n });\n }\n<\/code><\/pre>\n3\u3001\u60f3\u90fd\u4e0d\u6562\u60f3\u7684\u63d0\u4ea4\u529e\u6cd5<\/h2>\n
provider\u4e2d\u63d0\u4ea4\u7684\u63a5\u53e3\u662f\u7b26\u5408\u6b63\u5e38\u903b\u8f91\u7684\uff1a<\/p>\n
Future<void> submit(int id) async {\n await Future.delayed(const Duration(seconds: 2));\n _error = null;\n DioUtil.getInstance().addHeader("token", "123456789");\n await DioUtil.getInstance().post(\n "http:\/\/192.168.5.116:20080\/contact\/update",\n contact!.toJson(),\n () {\n\n },\n (data) {\n\n },\n (reason) {\n\n },\n );\n }\n<\/code><\/pre>\n\u4f46\u662f\u554a\uff0c\u4f5c\u4e3a\u4e00\u4e2aAndroid\u4f6c\uff0c\u54ea\u6015\u662f\u6709\u4e86ViewModel\uff0c\u6211\u4e5f\u6ca1\u90a3\u4e48\u6562\u60f3\u6709flutter\u8fd9\u79cd\u5199\u6cd5\uff1a<\/p>\n
Future<void> _submit() async {\n final editProvider = Provider.of<EditProvider>(context, listen: false);\n final mainProvider = Provider.of<MainProvider>(context, listen: false);\n \/\/ \u663e\u793a\u52a0\u8f7d Dialog\n showDialog(\n context: context,\n barrierDismissible: false,\n builder: (context) => Center(child: Container(\n width: 100,\n child: Dialog(child: Container(height: 100,child: Center(child: CircularProgressIndicator()),)),\n )),\n );\n\n try {\n if (widget.id != null) {\n await editProvider.submit(widget.id!);\n \/\/ \u5173\u95ed Dialog\n Navigator.of(context, rootNavigator: true).pop();\n \/\/ \u5173\u95ed\u5f53\u524d\u9875\u9762\n Navigator.of(context).pop();\n \/\/ \u901a\u77e5 main.dart \u5237\u65b0\u5217\u8868\n mainProvider.resetPage();\n await mainProvider.getListPage(mainProvider.pageNum);\n }\n } catch (e) {\n \/\/ \u5173\u95ed Dialog\n Navigator.of(context, rootNavigator: true).pop();\n showToast('\u63d0\u4ea4\u5931\u8d25\uff0c\u8bf7\u91cd\u8bd5', context: context);\n }\n }\n<\/code><\/pre>\n\u8fd9\u4ee3\u7801\u5c31\u662f\u6309\u4e0b\u63d0\u4ea4\u6309\u94ae\u5f39\u51faloading dialog\uff0c\u7b49\u6267\u884c\u5b8c\u6210\u4e86……\u76f4\u63a5\u6293\u4e0a\u4e00\u4e2aprovider\u5237\u65b0\u5217\u8868\uff01
\u6211\u5e72\u6d3b\u7684\u6b63\u5e38\u601d\u8def\u662f\uff1aviewModel\u5c42\u63d0\u4ea4\u540e\u62ff\u56de\u63d0\u4ea4\u6210\u529f\u7684\u63d0\u793a\uff0cActivity setResult()\u544a\u8bc9\u4e0a\u4e00\u9875\u6570\u636e\u6211\u63d0\u4ea4\u6210\u529f\u4e86\uff0c\u518d\u7136\u540e\u9000\u5230\u524d\u4e00\u9875\u81ea\u52a8\u5237\u65b0\u5217\u8868\u3002
flutter\u662f\u5565\uff1a\u6211\u76f4\u63a5\u6293\u7740\u524d\u4e00\u9875\u7684provider\u5e72\u63a5\u53e3\uff0c\u5988\u5440\u8fd9\u7b80\u76f4\u60f3\u90fd\u4e0d\u6562\u60f3\uff01
\u679c\u771f\u554a\uff0c\u6d3b\u5230\u8001\u5b66\u5230\u8001…….<\/p>\n
\u6700\u540e\u653e\u51fa\u5b8c\u6574\u4ee3\u7801\u5427<\/h2>\nedit_page.dart<\/h5>\nimport 'package:day07\/edit_provider.dart';\nimport 'package:flutter\/material.dart';\nimport 'package:flutter_styled_toast\/flutter_styled_toast.dart';\nimport 'package:provider\/provider.dart';\nimport 'detail_provider.dart';\nimport 'main_provider.dart';\n\nclass EditPage extends StatefulWidget {\n final int? id; \/\/ \u793a\u4f8b\u53c2\u6570\uff0c\u53ef\u6309\u9700\u4fee\u6539\n const EditPage({super.key, this.id});\n\n @override\n State<EditPage> createState() => _EditPageState();\n}\n\nclass _EditPageState extends State<EditPage> {\n final List<Map<String, dynamic>> genderOptions = [\n {'value': 0, 'label': '\u5973'},\n {'value': 1, 'label': '\u7537'},\n ];\n\n @override\n void initState() {\n super.initState();\n WidgetsBinding.instance.addPostFrameCallback((_) {\n final editProvider = Provider.of<EditProvider>(context, listen: false);\n if (widget.id != null) {\n editProvider.getDetail(widget.id!);\n }\n });\n }\n\n @override\n Widget build(BuildContext context) {\n final editProvider = Provider.of<EditProvider>(context);\n return PopScope(\n onPopInvokedWithResult: (didPop, result) {\n editProvider.clearData();\n },\n child: Scaffold(\n appBar: AppBar(\n title: const Text('\u8be6\u60c5'),\n leading: GestureDetector(\n onTap: () {\n editProvider.clearData();\n Navigator.of(context).pop();\n },\n child: const Icon(Icons.arrow_back_ios),\n ),\n ),\n body: Center(\n child: editProvider.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 : editProvider.error != null\n ? Column(\n mainAxisAlignment: MainAxisAlignment.center,\n children: [\n Text(editProvider.error!),\n const SizedBox(height: 16),\n ElevatedButton(\n onPressed: () {\n if (widget.id != null) {\n editProvider.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 controller: editProvider.lastName,\n onChanged: (value){\n editProvider.contact!.lastName = value;\n },\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 controller: editProvider.firstName,\n onChanged: (value){\n editProvider.contact!.firstName = value;\n },\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 controller: editProvider.age,\n onChanged: (value){\n try {\n editProvider.contact!.age = int.parse(value);\n } catch (e) {\n \/\/ \u5904\u7406\u89e3\u6790\u5931\u8d25\u7684\u60c5\u51b5\n editProvider.age.text=editProvider.contact!.age.toString();\n showToast('\u8bf7\u8f93\u5165\u6b63\u786e\u7684\u6570\u5b57',context: context);\n } },\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: DropdownButtonFormField<int>(\n value: editProvider.contact?.sex,\n items: genderOptions.map((option) {\n return DropdownMenuItem<int>(\n value: option['value'],\n child: Text(option['label']),\n );\n }).toList(),\n onChanged: (int? newValue) {\n if (newValue != null) {\n editProvider.contact?.sex = newValue;\n }\n },\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\n Padding(\n padding: const EdgeInsets.symmetric(\n horizontal: 8,\n vertical: 16,\n ),\n child: TextFormField(\n controller: editProvider.phoneNumber,\n onChanged: (value){\n editProvider.contact!.phoneNumber = value;\n },\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 controller: editProvider.address,\n onChanged: (value){\n editProvider.contact!.address = value;\n },\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 Padding(\n padding: const EdgeInsets.symmetric(\n horizontal: 8,\n vertical: 16,\n ),\n child: Center(child:\n ElevatedButton(\n onPressed: () {\n _submit();\n },\n child: Text("\u63d0\u4ea4"),\n ),)\n ),\n ],\n ),\n ),\n ),\n );\n }\n\n Future<void> _submit() async {\n final editProvider = Provider.of<EditProvider>(context, listen: false);\n final mainProvider = Provider.of<MainProvider>(context, listen: false);\n \/\/ \u663e\u793a\u52a0\u8f7d Dialog\n showDialog(\n context: context,\n barrierDismissible: false,\n builder: (context) => Center(child: Container(\n width: 100,\n child: Dialog(child: Container(height: 100,child: Center(child: CircularProgressIndicator()),)),\n )),\n );\n\n try {\n if (widget.id != null) {\n await editProvider.submit(widget.id!);\n \/\/ \u5173\u95ed Dialog\n Navigator.of(context, rootNavigator: true).pop();\n \/\/ \u5173\u95ed\u5f53\u524d\u9875\u9762\n Navigator.of(context).pop();\n \/\/ \u901a\u77e5 main.dart \u5237\u65b0\u5217\u8868\n mainProvider.resetPage();\n await mainProvider.getListPage(mainProvider.pageNum);\n }\n } catch (e) {\n \/\/ \u5173\u95ed Dialog\n Navigator.of(context, rootNavigator: true).pop();\n showToast('\u63d0\u4ea4\u5931\u8d25\uff0c\u8bf7\u91cd\u8bd5', context: context);\n }\n }\n\n @override\n void dispose() {\n super.dispose();\n }\n}\n<\/code><\/pre>\nedit_provider.dart<\/h5>\nimport 'package:day07\/bean\/contact_bean.dart';\nimport 'package:flutter\/material.dart';\n\nimport 'bean\/base_bean.dart';\nimport 'dio_util.dart';\n\nclass EditProvider with ChangeNotifier {\n final TextEditingController firstName = TextEditingController();\n final TextEditingController lastName = TextEditingController();\n final TextEditingController age = TextEditingController();\n final TextEditingController phoneNumber = TextEditingController();\n final TextEditingController address = TextEditingController();\n\n ContactBean? contact;\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 this.contact = contact;\n firstName.text = contact.firstName ?? '';\n lastName.text = contact.lastName ?? '';\n age.text = contact.age.toString();\n\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 Future<void> submit(int id) async {\n await Future.delayed(const Duration(seconds: 2));\n _error = null;\n DioUtil.getInstance().addHeader("token", "123456789");\n await DioUtil.getInstance().post(\n "http:\/\/192.168.5.116:20080\/contact\/update",\n contact!.toJson(),\n () {\n\n },\n (data) {\n\n },\n (reason) {\n\n },\n );\n }\n\n void clearData() {\n lastName.clear();\n firstName.clear();\n age.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 phoneNumber.dispose();\n address.dispose();\n \/\/ TODO: implement dispose\n super.dispose();\n }\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"\u5176\u5b9e\u8be6\u60c5\u9875\uff0c\u5c31\u6709\u70b9\u7f16\u8f91\u7684\u610f\u5473\u4e86~\u6240\u4ee5\u7f16\u8f91\u9875\u5c31\u662f\u8be6\u60c5\u9875\u6539\u51fa\u6765\u7684\uff01\u6539\u4e86\u70b9\u5565\uff0c\u5176\u5b9e\u4e5f\u6709\u8bf4\u7684\u3002 1\u3001\u628a\u6027\u522b\u4ece\u6587\u672c\u6846\u6362\u6210 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-334","post","type-post","status-publish","format-standard","hentry","category-androidflutter"],"_links":{"self":[{"href":"https:\/\/www.bqmz001.top\/index.php\/wp-json\/wp\/v2\/posts\/334","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bqmz001.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bqmz001.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bqmz001.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bqmz001.top\/index.php\/wp-json\/wp\/v2\/comments?post=334"}],"version-history":[{"count":27,"href":"https:\/\/www.bqmz001.top\/index.php\/wp-json\/wp\/v2\/posts\/334\/revisions"}],"predecessor-version":[{"id":361,"href":"https:\/\/www.bqmz001.top\/index.php\/wp-json\/wp\/v2\/posts\/334\/revisions\/361"}],"wp:attachment":[{"href":"https:\/\/www.bqmz001.top\/index.php\/wp-json\/wp\/v2\/media?parent=334"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bqmz001.top\/index.php\/wp-json\/wp\/v2\/categories?post=334"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bqmz001.top\/index.php\/wp-json\/wp\/v2\/tags?post=334"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}