Flutter热点问题修复

1、Exception: Unsupported Android Plugin version: 7.1.2. Flutter Android Studio

• 解决办法1

app/src/build.gradle

    productFlavors {
        app_dev {
            dimension "version"
            applicationIdSuffix ".dev"
        }
        app_stg {
            signingConfig signingConfigs.debug
            dimension "version"
            applicationIdSuffix ".stg"
        }
        app_prod {
            signingConfig signingConfigs.release
            dimension "version"
        }
    }

If it does have something like that, then you need to go to Run -> Edit Configuration -> Pick your main.dart on left side -> Inside ‘Build flavor’ put “app_dev” inside the textbox (The string can be anything and it depends on what’s inside your productFlavors { ... })

• 解决办法2

debug的时候去掉ABI splits in app build.gradle

2、轮播图数量变化导致问题异常信息：

Flutter Swiper组件使用过程中异常问题

解决方法：增加key属性

Key子类包含LocalKey和GlobalKey。

Swiper(
        itemCount: image_length,
        loop: true,
        autoplay: true,
        key: UniqueKey(),
        itemBuilder: (BuildContext context, int index) {
          return Image.network("image_url"); 
        }
      )

3、CocoaPods could not find compatible versions for pod

podfile里面的

# platform :ios, '11.0'

打开注释改为

platform :ios, '13.0'

pod完之后再改回来

4、SingleScrollView嵌套TabbarView

• 解决方法1

使用 NestedScrollView

NestedScrollView(
      headerSliverBuilder: (context, value) {
        return [
          SliverToBoxAdapter(
              child: Header()
          ),
          SliverToBoxAdapter(
            child: TabBar(
              controller: _controller,
              tabs: [
                Tab(icon: Icon(Icons.x)),
                Tab(icon: Icon(Icons.y)),
                Tab(icon: Icon(Icons.z)),
              ],
            ),
          ),
        ];
      },
    body: Container(
      child: TabBarView(
        controller: _controller,
        children: <Widget>[
          page1(),
          page2(),
          page3(),
        ],
      ),
    ),
  )

会存在同步滚动的问题，可参考关于flutter NestedScrollView导致其body的tabbarview的多个list同步滚动的解决方案，但是我试过了没作用

• 解决方法2

SingleScrollView嵌套TabbarView，对TabbarView用Container保住并设置高度，其高度监听scrollview滚动用动态计算，效果还可以

5、解决setState问题

@override
void setState(VoidCallback fn) {
  if (!mounted) return;
  super.setState(fn);
}