flutter 提示框2 Dialog

flutter 提示框 写在点击的方法体中

child里放自己喜欢的

        showDialog(  
          context: context,  
          builder: (BuildContext context) {  
            final Dialog alertDialog = Dialog(  
              backgroundColor: Colors.transparent,
              shadowColor:Colors.transparent,

              child: Container(
                  height: mediawidth*0.25,
                  width: mediawidth*0.5,
                  decoration: BoxDecoration(
                    // color: Colors.transparent,
                          image: DecorationImage(  
                            image: AssetImage('assets/images/choosed.png'),
                            fit: BoxFit.contain, 
                          ),
                        ),
                ),
            
            );  
  
            // 使用Future.delayed来在1秒后自动关闭对话框  
            Future.delayed(Duration(milliseconds: 700), () {  
              Navigator.of(context).pop();  
            });  
  
            return alertDialog;  
          },  
        );