应用程序登陆页面(主页)显示了一系列用于登录不同应用程序的按钮:
他们所有人都可以使用注销按钮注销,但 Apple 不行。这是我的代码
main.dart
class Main extends StatelessWidget {
@override
Widget build(BuildContext context) {
return StreamProvider<User>.value(
value: AuthService().user,
child: MaterialApp(
home: Wrapper(),
routes: {
"/stores": (_) => Stores()
},
));
}
}
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包装器.dart
class Wrapper extends StatelessWidget {
@override
Widget build(BuildContext context) {
final user = Provider.of<User>(context);
if (user == null) {
return Home(); <-- Landing page before login
} else {
return Stores(); <-- Landing page …Run Code Online (Sandbox Code Playgroud) 我是Javascript,jQuery,Ajax和jSON世界的新手.
我需要做的是混合使用SELECT2的2个选项
占位符
$("#e2_2").select2({
placeholder: "Select a State"
});
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和
加载远程数据
$("#e6").select2({
placeholder: "Search for a movie",
minimumInputLength: 1,
ajax: { // instead of writing the function to execute the request we use Select2's convenient helper
url: "http://api.rottentomatoes.com/api/public/v1.0/movies.json",
dataType: 'jsonp',
data: function (term, page) {
return {
q: term, // search term
page_limit: 10,
apikey: "ju6z9mjyajq2djue3gbvv26t" // please do not use so this example keeps working
};
},
results: function (data, page) { // parse the results into the format …Run Code Online (Sandbox Code Playgroud) 我正在尝试学习如何使用 React-Final-Form (简称 RFF)。
我已经学会了如何使用<Field>组件,但现在我需要添加一个自定义组件来使用 RFF 未提供的所见即所得编辑器。
所以,我选择了react-draft-wysiwyg。
好的,首先这是我的表格:
const FormComponent = () => {
const handleSubmitOnClick = () => ({
news_title,
news_subtitle,
editor_content,
image_url,
}) => {
const data = {
"user": {
news_title: news_title,
news_subtitle: news_subtitle,
editor_content: editor_content <- here the content from the WYSIWYG editor
image_url: image_url
}
}
// API call here ....
}
return (
<>
<h1>News Main Page</h1>
<Form
onSubmit={handleSubmitOnClick()}
>
{
({
handleSubmit,
values,
submitting,
}) => (
<form onSubmit={handleSubmit} data-testid="form"> …Run Code Online (Sandbox Code Playgroud) 我是 flutter 新手,每次运行应用程序时都会出现错误:
\n\xe2\x95\x90\xe2\x95\x90\xe2\x95\xa1 EXCEPTION CAUGHT BY WIDGETS LIBRARY \xe2\x95\x9e\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\nThe following NoSuchMethodError was thrown building DataList(dirty, dependencies:\n[_InheritedProviderScope<List<Store>>], state: _DataListState#67e37):\nThe getter 'length' was called on null.\nReceiver: null\nTried calling: length\nThe relevant error-causing widget was:\n DataList\nRun Code Online (Sandbox Code Playgroud)\n这是我的数据列表文件:
\nclass DataList extends StatefulWidget {\n @override\n _DataListState createState() => _DataListState();\n}\n\nclass _DataListState extends State<DataList> {\n @override\n Widget build(BuildContext context) {\n final stores = Provider.of<List<Store>>(context);\n\n // stores.forEach((d) {\n // print(d.name);\n // });\n\n return ListView.builder(\n itemCount: stores.length,\n itemBuilder: (context, index) {\n return StoreTile(store: stores[index]);\n },\n );\n …Run Code Online (Sandbox Code Playgroud)