解决方案是将该流提升到该小部件的initState中,或者使用类似RiverpodStreamProvider的东西来 Package 值,...
SetState在这种情况下不起作用。这需要StreamBuilder。StreamBuilder获取输入流并在builder字段中的小部件内...
解决方案是将该流提升到该小部件的initState中,或者使用类似RiverpodStreamProvider的东西来 Package 值,...
问题:上例中margin不是状态变量**。它是build方法内部的局部变量。
Future表示在接下来的某个时间的值或错误,借助Future我们可以在Flutter实现异步操作Future是dart:async包中的一个类,使用它时需要导入...,如何为Future设置超时时间呢?四、什么是FutureBuilder?1、FutureBuildere是一个将异步操作和异步UI更新结合在一起的类,通过它我们可以将网络请求,数据库读取等的结果...
1 Flutter TextField not responding inside FutureBuilder 3 Flutter - how to supply init value of TextField with dynamic value from FutureBuilder? 4 Flutter FutureBuilder not updating when setState() is called Hot Network Questions Short novel where kids travel through tiny parallel universe Ca...
Flutter是一种跨平台的移动应用开发框架,它可以帮助开发者快速构建高性能、美观的移动应用程序。GridView是Flutter中的一个常用组件,用于展示网格布局的内容。然而,有时候在使用GridView时可能会遇到无法正确显示的问题。 造成GridView不能正确显示的原因可能有多种,下面我将列举一些可能的原因和解决方法: 数据源问题:首先...
There is a widget provided by the framework called FutureBuilder that you can use to build widgets asynchronously. FutureBuilder( future: databaseObject.getContradictions, builder: (context, snapshot) { if (snapshot.hasData) { final contradictions = snapshot.data; return your_title_widget_here; ...
下面没有列出,但尝试了在setState({})、FutureBuilder()和重新生成一个新的FireStore项目/db中进行初始化。 google-services.json位置: main: import 'package:flutter/material.dart'; import 'package:firebase_auth/fi 浏览2提问于2020-12-13得票数 1...
UI Components: Flutter provides a rich set of highly customizable widgets to create complex UIs. ReactJS in contrast, requires additional libraries like React-bootstrap or Material-UI to provide similar sets of UI components. Performance: Since Flutter apps are compiled to native machine code, they...