Flutter GestureDetector onTap 不工作

Question

当用户点击外部时，尝试使用 GestureDetector 使 TextFormField 失去焦点，但我无法让它工作。onTap 永远不会触发。

class EditScreen extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: new GestureDetector(
        onTap: () {
          print('this does not fire, why???????????');

          // this is my attempt to unfocus textformfield when click away
          FocusScope.of(context).requestFocus(new FocusNode());
        },
        child: SingleChildScrollView(
          child: Column(
            children: <Widget>[
              TextFormField(
                maxLines: null,
              ),
            ],
          ),
        ),
      ),
    );
  }
}

Answer 1

尝试使用 Gesture Detector 包裹你的 Scaffold，然后使用 onTap 函数：

      onTap: () {
    FocusScopeNode currentFocus = FocusScope.of(context);
    if (!currentFocus.hasPrimaryFocus) {
      currentFocus.unfocus();
    }

所以每次你点击脚手架它都会开火