在颤动中将焦点滑动到文本域

var focusNode = FocusNode();
var textField = TextField(focusNode: focusNode);


FocusScope.of(context).requestFocus(focusNode);
// or
focusNode.requestFocus();

参见

• Https://api.flutter.dev/flutter/widgets/focusnode-class.html
• Https://flutter.dev/docs/cookbook/forms/focus

 TextField(
autofocus: true,
);

使用

FocusScope.of(context).previousFocus();

Column(
children: [
TextField(...), // 1st TextField
TextField(...), // 2nd TextField
RaisedButton(
onPressed: () => FocusScope.of(context).previousFocus(), // This is what you need
child: Text("Go back"),
),
],
)

FocusNode name _ focus = FocusNode () ;

                     TextField(
controller: name_Controller,
focusNode: name_focus,
decoration: InputDecoration(
errorText: name_validate ? 'Enter Name' : null,
labelStyle:
TextStyle(color: HexColor(HexColor.gray_text)),
labelText: "Name",
border: OutlineInputBorder(),
enabledBorder: OutlineInputBorder(
borderSide:
BorderSide(color: HexColor(HexColor.gray))),
focusedBorder: OutlineInputBorder(
borderSide:
BorderSide(color: HexColor(HexColor.gray))),
),
),

检查验证名称是否为空自动滚动显示我的页面

 if(name_Controller.text.isEmpty){
name_validate=true;
name_focus.requestFocus();
}