We can simply pass a function as parameter like we pass a variable. When we want to call the passed function from calling function, we just call it with () at the end along with parameters if it accepts any. try
Widgetbuild(BuildContext context,WidgetRef ref){int userId;// Read the user ID from somewherefinal locale=Localizations.localeOf(context);final something=ref.watch(exampleProvider(MyParameter(userId:userId,locale:locale)),);...} .autoDispose 它的一个常见的用例是,当一个Provider不再被使用时,要销...
A TypeAhead widget for Flutter, where you can show suggestions to users as they type - AbdulRahmanAlHamali/flutter_typeahead
have to use a global key assigned to the SignaturePad instance to call this method. Optionally, thepixelRatioparameter may be used to set the pixel ratio of the image. The higher the pixel ratio value, the high-quality picture you get. The default value of the pixel ratio parameter is 1...
To create a new ParseQuery, you need to pass as a parameter the desired ParseObject subclass, which is the one that will contain your query results. You can see a user query example below. Using the code provided, find the doUserQuery function in the file main.dart. Replace the code ins...
flutter 参数类型'MaterialApp Function()'无法指派给参数类型'Widget Function(BuildContext，Widget？'嗨，...
The first thing to know is that the height of ModalBottomSheets defaults to half of the screen. In order to change it, you must pass true to the isScrollControlled parameter and return a widget that matches the size we expect, so let's do this. ...
An example is adding notes to the text, or anything custom that you want to add in your text editor. The only thing that you need is to add a CustomBlockEmbed and provider a builder for it to the embedBuilders parameter, to transform the data inside of the Custom Block into a widget...
voidmain() { runApp(MyApp()); }///flutter 2.0classMyAppextendsStatelessWidget{@overrideWidget build(BuildContext context) {returnMaterialApp( home: Container(), builder: (BuildContext context, Widget? child) {returnFlutterSmartDialog(child: child); }, ); } }///flutter 1.xclassMyAppextendsSt...
当我appbar抽出来的时候。如: 引用的时候会出现问题'getAppBarWidget' can't be assigned to the parameter type '...