报错：Building for iOS, but the linked and embedded framework 'App.framework' was built for iOS Simulator.或者Building for iOS Simulator, but the linked and embedded framework 'App.framework' was built for iOS.
文章链接地址：https://flutter.dev/docs/development/ios-project-migration
根据文档设置下来，很可能xcode Run完以后生成的App.framework不会出现asssts文件，编译失败，造成这一问题的原因很有可能是缓存问题依然存在, clear build然后重启电脑，再clear build， Run，OK了，完美解决
