flutter-layout

问题 I have a list of data called anchors that has a link to a detailed screen. And each anchor has distribution centers which are an array of nested objects. so I was able to parse an id of each of the anchors to a detailed screen and Oid I am having a challenge to loop through the children i.e the distribution centers of the anchors. Please can anyone help me, I was able to pull all the values belonging to an anchor to the detailed screen but how to loop through the nested values in the detailed

问题 I have a list of data called anchors that has a link to a detailed screen. And each anchor has distribution centers which are an array of nested objects. so I was able to parse an id of each of the anchors to a detailed screen and Oid I am having a challenge to loop through the children i.e the distribution centers of the anchors. Please can anyone help me, I was able to pull all the values belonging to an anchor to the detailed screen but how to loop through the nested values in the detailed

问题 I have a list of data called anchors that has a link to a detailed screen. And each anchor has distribution centers which are an array of nested objects. so I was able to parse an id of each of the anchors to a detailed screen and Oid I am having a challenge to loop through the children i.e the distribution centers of the anchors. Please can anyone help me, I was able to pull all the values belonging to an anchor to the detailed screen but how to loop through the nested values in the detailed

问题 I am new to flutter this error is giving me a serious nightmare. I have a card list of items called Anchors. These items are coming from the shared preference file which belongs to the logged-in user. In the shared preference Json file, each anchor has one or more distribution centers nested to it. All in a JSON form stored in the shared Preference. Now, I was able to iterate over the anchors respectfully at the first screen but the challenge I am having is when I click on view anchor details

问题 I want to detect the gestures on the TabBarView so I wrapped the TabBarView in a GestureDetector widget, but it doesn't register any kind of gesture. And swiping to different tabs works. I just want a detect the gestures. TabController _tabController; @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar(//I have 3 tabs in here at AppBar.bottum), ///This is where I need help with the GestureDetector not working. body: GestureDetector( onHorizontalDragStart:

问题 This is full code: class Application extends StatelessWidget { @override Widget build(BuildContext context) { return new MaterialApp( home: new Scaffold( body: new Container( color: Color(0xff258DED), height: 400.0, alignment: Alignment.center, child: new Container( height: 200.0, width: 200.0, decoration: new BoxDecoration( image: DecorationImage( image: new AssetImage('assets/logo.png'), fit: BoxFit.fill ), shape: BoxShape.circle ), ), child: new Container( child: new Text('Welcome to Prime

问题 I am using row widget with three child widgets: Text Icon Text I want all of them to appear in single line same level horizontally and drop to new line if text increases. I am using below code for Row widget but last Text widget is not aligned correctly The text dropping should start below the " Tap " and " on the right hand " is not aligned Row( mainAxisAlignment: MainAxisAlignment.start, mainAxisSize: MainAxisSize.min, children: <Widget>[ Text( 'Tap ', style: TextStyle( fontSize: 17, ), ),

问题 Trying to figure out if I can align the text in a full width button, i.e a button that has width: double.infinity for example this: ButtonTheme( minWidth: double.infinity, child: FlatButton( onPressed: () {}, child: Text('Sign Out', textAlign: TextAlign.left), ), ) produces a centered text button and the alignment cannot be changed. I have tried a few things but can't figure it out, unless I try to create a custom button. I'm trying to get a full width button with text:left so the user can

问题 I am trying to display gif in flutter. I am using the code Image(image : NetworkImage(message.image_url)) But it shows error: Another exception was thrown: Exception: HTTP request failed, statusCode: 403, https://media.giphy.com/media/13AXYJh2jDt2IE/giphy.gif%20 回答1: Place your gif in your images folder of your project and mention it in pubspec.yaml file,just like you do for images. Image.asset( "images/loading.gif", height: 125.0, width: 125.0, ) 回答2: This is what used in Flutter Gallery app

问题 I am trying to display gif in flutter. I am using the code Image(image : NetworkImage(message.image_url)) But it shows error: Another exception was thrown: Exception: HTTP request failed, statusCode: 403, https://media.giphy.com/media/13AXYJh2jDt2IE/giphy.gif%20 回答1: Place your gif in your images folder of your project and mention it in pubspec.yaml file,just like you do for images. Image.asset( "images/loading.gif", height: 125.0, width: 125.0, ) 回答2: This is what used in Flutter Gallery app