如果我启用并聚焦先前禁用的TextFormField,则看不到闪烁的光标。在本例中,TextFormField最初是禁用的,正如_enabled状态变量所指示的那样,当您单击enable按钮时,该字段将被启用并聚焦,但闪烁的光标不可见。我必须单击TextFormField才能看到闪烁的光标。
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
// This widget is the root o
我正在尝试将首次按钮设置为禁用,当用户输入它被启用的金额时,按钮禁用工作正常,但当我在TextFormField中输入金额时,它给出以下错误。 I/flutter (29519): ══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY
╞═══════════════════════════════════════════════════════════
I/flutter (29519): The following assertion was thrown building
TextFormField(dirty, state: _T
我有一张有三个容器的卡片。前两个有文本,最后一个应该与一些文本一起保存一个TextFormField。所以我要把这两个人排在一起。唯一的问题是,当我添加TextFormField小部件时,它不会出现,控制台抛出显示一个错误。
══╡ EXCEPTION CAUGHT BY RENDERING LIBRARY
╞═════════════════════════════════════════════════════════
I/flutter (14101): The following assertion was thrown during
perform
我一直在尝试测试一个元素,当按下IconButton时,文本对象会更改为TextFormField。当我尝试测试它时,我会得到以下错误:
A Timer is still pending even after the widget tree was disposed.
'package:flutter_test/src/binding.dart': Failed assertion: line 672 pos 7:
'_fakeAsync.nonPeriodicTimerCount == 0'
尽管小部件没有使用我所知道的任何计时器?
示例代码:
await t