升级Xcode11.4导致Flutter项目报错Building for iOS, but the linked and embedded framework 'App.framework'的处理

之前Flutter项目都妥妥的，升级Xcode11.4后却报错。

error: Building for iOS, but the linked and embedded framework 'App.framework' was built for iOS Simulator. (in target 'Runner' from project 'Runner')

别急，首先Clean下项目，在项目根目录下：

flutter clean

然后删除ios/Flutter/App.framework：

rm -rf ios/Flutter/App.framework

再次运行，应该就OK了。

如果还是不行的话，双击ios/Runner.xcworkspace。在Xcode左侧Navigator中，删除App.framework和Flutter.framework。

在Runner Target -> Build Phases -> Link Binary With Libraries和Embed Frameworks中，确认下图红框中没有App.framework和Flutter.framework。

将Build Phases -> Thin Binary中的脚本改为如下：

/bin/sh "$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh" embed
/bin/sh "$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh" thin

切换到Runner Target的Build Settings面板，双击Other Linker Flags项，在弹出窗口中点击**+**号，并输入：

$(inherited) -framework Flutter