英文:
How can i change the focus to other textfield after i complete max characters in Flutter?
问题
如何在Flutter中在达到最大字符数后而不需要按下下一个/完成按钮的情况下将焦点更改到其他节点？如何使用Focus节点将控制权传递给其他TextField？我想在每个TextField的前4个字符后将控制权传递给下一个TextField。
Widget serailKey1() {
return TextField(
controller: controller_key1,
focusNode: _serialKeyFN1,
textAlign: TextAlign.center,
keyboardType: TextInputType.text,
textCapitalization: TextCapitalization.characters,
style: textStyle,
maxLength: 4,
decoration: new InputDecoration(
counterText: "",
border: new OutlineInputBorder(
borderRadius: const BorderRadius.all(
const Radius.circular(0.0),
),
),
),
onEditingComplete: () => FocusScope.of(context).requestFocus(_serialKeyFN2),
);
}
Widget serailKey2() {
return TextField(
controller: controller_key2,
focusNode: _serialKeyFN2,
textAlign: TextAlign.center,
keyboardType: TextInputType.text,
style: textStyle,
textCapitalization: TextCapitalization.characters,
maxLength: 4,
decoration: new InputDecoration(
counterText: "",
border: new OutlineInputBorder(
borderRadius: const BorderRadius.all(
const Radius.circular(0.0),
),
),
),
onEditingComplete: () => FocusScope.of(context).requestFocus(_serialKeyFN3),
);
}
这些是您提供的两个TextField小部件，它们具有用于控制焦点的FocusNode，并在编辑完成时将焦点传递给下一个TextField。
英文:
How do I change the focus to other node after completion max characters without pressing next/done in Flutter ?. How do I pass the control to other TextField using Focus node. I want to pass the control to next textfield after 4 characters of every textfield.
Widget serailKey1() {
return TextField(
controller: controller_key1,
focusNode: _serialKeyFN1,
textAlign: TextAlign.center,
keyboardType: TextInputType.text,
textCapitalization: TextCapitalization.characters,
style: textStyle,
maxLength: 4,
decoration: new InputDecoration(
counterText: "",
border: new OutlineInputBorder(
borderRadius: const BorderRadius.all(
const Radius.circular(0.0),
),
),
),
onEditingComplete: ()=> FocusScope.of(context).requestFocus(_serialKeyFN2),
);
}
Widget serailKey2() {
return TextField(
controller: controller_key2,
focusNode: _serialKeyFN2,
textAlign: TextAlign.center,
keyboardType: TextInputType.text,
style: textStyle,
textCapitalization: TextCapitalization.characters,
maxLength: 4,
decoration: new InputDecoration(
counterText: "",
border: new OutlineInputBorder(
borderRadius: const BorderRadius.all(
const Radius.circular(0.0),
),
),
),
onEditingComplete: ()=> FocusScope.of(context).requestFocus(_serialKeyFN3),
);
}
答案1
得分: 0
这对我来说很好用：
FocusNode fNode = FocusNode();
...
TextField(onChanged: (value){
if(value.length == 4)
FocusScope.of(context).requestFocus(fNode);
}),
TextField(focusNode: fNode),
英文:
This works fine for me:
FocusNode fNode = FocusNode();
...
TextField(onChanged: (value){
if(value.length == 4)
FocusScope.of(context).requestFocus(fNode);
}),
TextField(focusNode: fNode),
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