dart – 以编程方式关注InputField并打开键盘

我正在使用Focus.moveTo功能;但是,即使InputField处于聚焦状态(出现闪烁的光标),键盘也不会启动.

似乎最好的解决方案是在_InputFieldState中调用RequestKeyboard()函数,但这是私有的.

实现这一目标的最佳方法是什么？

以下是显示工作流程的代码示例：

class InputFieldWrapper extends StatefulWidget {

  @override
  _InputFieldWrapperState createState() => new _InputFieldWrapperState();
}


class _InputFieldWrapperState extends State<InputFieldWrapper> {

  InputValue _currentInput = new InputValue(text: 'hello');

  // GlobalKey for the InputField so we can focus on it
  GlobalKey<EditableTextState> _inputKey = new GlobalKey<EditableTextState>();

  @override
  Widget build(BuildContext context) {
    return new Column(
      children: [
        // Button that should focus on the InputField when pressed
        new IconButton(
          icon: new Icon(Icons.message),onPressed: () {
            Focus.moveTo(_inputKey);
          },),// InputField that should be focused when pressing the Button
        new InputField(
          value: _currentInput,key: _inputKey,onChanged: (InputValue input) {
            setState(() {
              _currentInput = input;
            });
          }
        ),],);
  }
}