相关疑难解决方法(0)

在Flutter中,我在异步任务期间为loader编写简单的对话框.当我触摸外部对话被解雇时,我该如何阻止这种行为？

码

  showDialog(
    context: context,
    builder: (_) => new Dialog(
          child: new Container(
            alignment: FractionalOffset.center,
            height: 80.0,
            padding: const EdgeInsets.all(20.0),
            child: new Row(
              mainAxisSize: MainAxisSize.min,
              children: [
                new CircularProgressIndicator(),
                new Padding(
                  padding: new EdgeInsets.only(left: 10.0),
                  child: new Text("Loading"),
                ),
              ],
            ),
          ),
        ));

任何帮助将不胜感激,谢谢你提前.