小编Lir*_*bul的帖子

我尝试在 {AbsorbPointer} （特别是 {GestureDetector} onPanEnd）调用的 'fling' 函数的 SetState() 内使用 'showGeneralDialog' 编写动画对话框脚本。我附加了简单的代码，我尝试用未来的异步等待等来完成它，但可能我不明白。

“child: EasyDialog”在我的代码中定义为 void 函数。\n这是我的调试控制台和附加的代码

如果有人能指导我如何在 setState 期间完成动画（pageBuilder），我会很高兴。

[38;5;248m\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90 Exception caught by widgets library \xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90\xe2\x95\x90[39;49m\n[38;5;244mThe following assertion was thrown building Builder(dirty, dependencies: [_LocalizationsScope-[GlobalKey#3e9b6]]):[39;49m\nsetState() or markNeedsBuild() called during build.\n\n[38;5;244mThis Overlay widget cannot be marked as needing to build because the framework is already in the process of building widgets.  A widget can be marked as needing to be built during the build phase only if one of its …

我尝试编写生成数组随机值并显示在小部件卡上的代码（每次打开时都会显示 array{string} 中的另一个值）。实际上，代码从数组中选择一个单元格一次，每次我打开小部件它显示了与第一个选择的相同的小部件（没有更改）我使用 slimycard 包（https://pub.dev/packages/slimy_card）

// in 'homepage' class widget build
child: StreamBuilder(
            initialData: false,
            stream: slimyCard.stream,
            builder: ((BuildContext context, AsyncSnapshot snapshot) {
              return ListView(
                padding: EdgeInsets.only(top: 150),
                children: <Widget>[
                  // SlimyCard is being called here.
                  SlimyCard(
                    color: Colors.transparent.withOpacity(0.2),
                    topCardHeight: 450,
                    width: 400,
                    topCardWidget: topCardWidget(),
                    bottomCardWidget: bottomCardWidget(),
                  ),
                ],
              );
            }),
          )
// the widget I want to change his text every time he's opened.
  Widget bottomCardWidget() {
    return FutureBuilder(
        future: _getfromlist(widget.mode),
        initialData: 'loading..',
        builder: (BuildContext context, AsyncSnapshot<String> …