解决flutter在iOS14+真机上的运行问题

In iOS 14+,debug mode Flutter apps can only be launched from Flutter tooling, IDEs with Flutter plugins or from Xcode.

Alternatively,build in profile or release modes to enable launching from the home screen.

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在iOS 14+，调试模式Flutter应用程序只能从Flutter工具，带有Flutter插件的ide或Xcode启动。

或者，构建概要文件或发布模式，以支持从主屏幕启动。

$ cd 项目目录
$ flutter run --release