按照Alok的建议，我研究了onSubmitted方法。我使用TextfromField，所以在我的例子中我选择了onFieldSubmitte...
我确信您正在寻找的是TextField的onSubmitted。这样做的目的是，在按下键盘上的Enter时，它会给出一个值...
onSaved: (value) { username = value; }, validator: validateUsername, autovalidate: _autovalidate, ), TextFormField( obscureText: true, decoration: InputDecoration( labelText: 'Password', helperText: 'please inputPassword', ), onSaved: (value) { password = value; }, validator: validatePass...
decoration: InputDecoration(labelText:'Password'), obscureText:true, ), RaisedButton( onPressed: (formKey.currentState.validate()) {// 如果表单验证通过,则可以提交数据}, child: Text('Submit'), ), ], ), ), ), ), ); } } 在这个例子中,我们使用了TextFormField控件来创建输入框,并通过valid...
key: registerFormKey, child: Column( children:<Widget>[ TextFormField( decoration: InputDecoration( labelText:'Username', helperText:'', ), onSaved: (value) { username=value; }, validator: validateUsername, autovalidate: autovalidate,
validator: (value) {if(value ==null|| value.isEmpty) {return'Please enter your email'; }if(!value.contains('@')) {return'Please enter a valid email address'; }returnnull; }, ),constSizedBox(height:16), TextFormField( controller: _passwordController, ...
TextField and TextFormField can use a MaterialStatesController by @Renzo-Olivares in #133977 UndoHistory stack We fixed a problem where the undo/redo history could disappear on Japanese keyboards, and made it so you can now modify the UndoHistory stack. Add undoStackModifier to UndoHistory ...
当您为 Delete绑定一个 Delete/Backspace 加速器,但随后有用户可能正在 子 TextFields 输入,这一点尤其重要。 鼠标进入、退出和悬停 在桌面上,通常会更改鼠标光标以指示鼠标悬停在其上的内容的功能。例如,当您将鼠标悬停在按钮上时通常会看到一个手形光标,或者当您将鼠标悬停在文本上时会看到一个 I光标。
点击按钮,autovalidate为false的情况,执行_formKey.currentState.validate()会对上边的TextFormField的内容进行验证,如果不符合验证条件就会显示错误的提示文字 image.png 参数解析 constForm({Key key,@requiredthis.child,this.autovalidate=false,this.onWillPop,this.onChanged,})/// If true, form fields will ...
Whenever I try to enter text into a TextFormField, the keyboard pops up for a brief second and hides away instantly. I read up on this and tried setting GlobalKeys (_k1, _k2) for the fields, however the keyboard still disappears instantl...