Flutter flutter: Another exception was thrown: setState() called after dispose()報錯

原因是組件已經被銷毀了但你仍然調用該組件的setState()這個方法

解決辦法:

setState方法之前調用mouted屬性進行判斷即可。

if (mounted) {
  _sctrollController = widget.sctrollController;
  _sctrollController.addListener(() {
    setState(() {
      var scrollProportion = _sctrollController.offset / (400 - _statusBarHeight - 44);
      var tempOffsetY = 60 - 60 * scrollProportion;
      if (tempOffsetY > 60) {
        tempOffsetY = 60;
      }else if (tempOffsetY < 0) {
        tempOffsetY = 0;
      }
      _offsetY = tempOffsetY;
    });
  });
}