flutter-layout

问题 I wanted to know if there was a way of adding a prefix (like "- ") to every line in a multiline Text Input in Flutter. For example: Hello World! Would become: -Hello -World! This is my code: TextField( maxLines: null, controller: _elementsController, textCapitalization: TextCapitalization.sentences, style: TextStyle( fontSize: 18.0, ), decoration: InputDecoration( contentPadding: EdgeInsets.all(0.0), labelText: 'Elements', ), ), 回答1: U can add a - everytime a new line is created. Add this in

问题 I want to fade both side (edges) of a content. I use a ShaderMask along with a LinearGradient , it works great except that I don't understand why my stops are not centered correctly, I use stops: [0.0, 0.05, 0.95, 1.0] so that it should be faded 0.05 on each side, but I get the following (I added a Container gradient with same configuration for comparison): With debug paint mode : I use exactly the same stops for the Container and for the ShaderMask but get different results. Of course I can

问题 I want to fade both side (edges) of a content. I use a ShaderMask along with a LinearGradient , it works great except that I don't understand why my stops are not centered correctly, I use stops: [0.0, 0.05, 0.95, 1.0] so that it should be faded 0.05 on each side, but I get the following (I added a Container gradient with same configuration for comparison): With debug paint mode : I use exactly the same stops for the Container and for the ShaderMask but get different results. Of course I can

问题 I am facing problems with the CircularProgressIndicator in a login page. I would like to do this. When the users tap in "log in" button I want that the app makes a CircularProgressIndicator and kick the raisedButton Text and add the CircularProgessIdnicator, and after that my app get the data from my webservice I want to stop the CircularProgessIndicator. Any Tips? thanks. Actual Code (you can compile it without problems just add http: ^0.12.0 in dependencies). Photos of the actual system:

问题 Befor HTTP response show loading and after https response create tab view. I successfully create tab view but my problem is after HTTP request unable to update the view in the android studio with java we use `mAdapter.notifyDataSetChanged(); mActivity.runOnUiThread(new Runnable() { @Override public void run() { } });` code for doing this. what is the equivalent code in the flutter? 回答1: If you want update any widget in flutter you should call setState((){}) class MyApp extends StatefulWidget

问题 I am trying to wrap the text ' Awesome somthing very long text which should ideally soft warp ' in the blow code. Tried using Flexible and Expanded , did not work. It's getting tough to have softWrap working in nested row column scenarios :( import 'package:flutter/material.dart'; import 'package:sample/models/Reward.dart'; class RewardDetailsView extends StatelessWidget { final Reward _reward; RewardDetailsView(this._reward); @override Widget build(BuildContext context) { return Scaffold(

问题 This code here currently loads all the brews that are stored in the Firestore collection.. How can i load initially just 10 brews and then later on when the user scrolls down and reaches to the end of the list of 10 brews..it should load 10 more after the last brew..and the brews should be sorted according to the timestamp. class BrewList extends StatefulWidget { @override _BrewListState createState() => _BrewListState(); } class _BrewListState extends State<BrewList> { List<Brew> brews = [];

问题 I'm trying to highlight any numbers & special characters like '%' from a String that comes dynamically from JSON. This is my current implementation but I can't understand how to change it dynamically. RichText( overflow: TextOverflow.ellipsis, textAlign: TextAlign.center, maxLines: 4, text: TextSpan( children: <TextSpan>[ TextSpan( text: 'Hey I\'m', style: TextStyle( color: kDarkBlue, fontSize: 21)), TextSpan( text: '1234 ', style: TextStyle( fontWeight: FontWeight.w800, fontSize: 24)),

问题 So I'm the ToggleButtons introduced in 1.9.1 like this: Column( mainAxisAlignment: MainAxisAlignment.start, crossAxisAlignment: CrossAxisAlignment.start, children: <Widget>[ Padding(padding: EdgeInsets.only(top: 8),), Text('Sort By: '), Align( alignment: Alignment.topLeft, child: ToggleButtons( borderColor: Color(0xffED7D31), selectedBorderColor: Color(0xffED7D31), selectedColor: Color(0xffAD7651), fillColor: Color(0xffFBE5D6), color: Color(0xffBF987E), children: <Widget>[ ...state.sortBy

问题 I was trying to create a simple web page on Flutter Web (dev channel - v1.13.2) and this weird issue occured. When I tried to place a Flare animation in stack widget which have 2 additional widget, a background and a centered text respectively, the Flare didn't seems to appear. But when I remove the background container, flare works and positioned perfectly. Here is the code; import 'package:flutter/material.dart'; import "package:flare_flutter/flare_actor.dart"; void main() => runApp(MyApp()