1.appBar的leading控件无法改大小

appBar: AppBar(
     leading: Container(
       width: 100,
       height: 30,
       color: Colors.red,
       margin: EdgeInsets.only(left: ScreenAdapter.width(20)),
       child: Row(
         mainAxisAlignment: MainAxisAlignment.spaceBetween,
         children: [
           ImageUtils.name("icon_Location.png"),
           SizedBox(width: 10),
           Text("东莞市")
         ],
       ),
     ),
     title: Text("首页"),
   ),

leading不能改变大小，网上看是使用title写
改造后

return Scaffold(
      appBar: AppBar(
        title: Row(
          mainAxisAlignment: MainAxisAlignment.start,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            ImageUtils.name("Location_icon.png"),
            SizedBox(width: 10),
            Text(
              "东莞市",
              style: TextStyle(color: Colors.white),
            )
          ],
        ),
      ),
      body: Text("aaa"),
    );

2.真机模拟器突然运行不了

检查代码发现是一句代码的问题 ，太他妈坑了

3.点击空白处回收键盘

 return GestureDetector(
      behavior: HitTestBehavior.translucent,
      onTap: () {
        //点击空白关闭软键盘  
        FocusScope.of(context).requestFocus(FocusNode());
      },
      child: Container();//此处输入框
);

4.flutter 图片地址有效但是返回404导致崩溃

参考# Flutter cached_network_image图片缓存异常/加载失败优化