flutter - 在Flutter中的嵌套 “onVerticalDragUpdate”上接收 “GestureDetectors”

以下代码段只是我实际情况的最小化版本。在我的实际情况中，这些GestureDetectors位于不同的小部件中。我的问题是，onVerticalDragUpdate事件仅由内部GestureDetector接收。我什至将内部behavior的GestureDetector设置为HitTestBehavior.translucent，这意味着该事件应该冒泡到父窗口小部件。还是我到那里出问题了？

void main() {
  debugPaintPointersEnabled = true;
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  @override
  Widget build(BuildContext context) {
    return GestureDetector(
        onVerticalDragUpdate: (details) {
          var test = "test";
        },
        child: GestureDetector(
          behavior: HitTestBehavior.translucent,
          onVerticalDragUpdate: (details) {
            var test = "test";
          },
          child: Container(height: 100, width: 100, color: Colors.red),
        ));
  }
}

最佳答案

对于每个有兴趣的人，这就是我解决的方法:

class _MyAppState extends State<MyApp> {
  @override
  Widget build(BuildContext context) {
    return RawGestureDetector(
        gestures: {
          AllowMultipleVerticalDragGestureRecognizer: GestureRecognizerFactoryWithHandlers<
              AllowMultipleVerticalDragGestureRecognizer>(
            () => AllowMultipleVerticalDragGestureRecognizer(),
            (AllowMultipleVerticalDragGestureRecognizer instance) {
              instance..onEnd = (_) => print("test1");
            },
          )
        },
        child: RawGestureDetector(
          gestures: {
            AllowMultipleVerticalDragGestureRecognizer: GestureRecognizerFactoryWithHandlers<
                AllowMultipleVerticalDragGestureRecognizer>(
              () => AllowMultipleVerticalDragGestureRecognizer(),
              (AllowMultipleVerticalDragGestureRecognizer instance) {
                instance..onEnd = (_) => print("test2");
              },
            )
          },
          child: Container(color: Colors.red),
        ));
  }
}

class AllowMultipleVerticalDragGestureRecognizer extends VerticalDragGestureRecognizer{
  @override
  void rejectGesture(int pointer) {
    acceptGesture(pointer);
  }
}

信用:https://gist.github.com/Nash0x7E2/08acca529096d93f3df0f60f9c034056

关于flutter - 在Flutter中的嵌套 “onVerticalDragUpdate”上接收 “GestureDetectors”，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/58138114/