MXFlutter的依赖发生变化，需要将iOS最低系统版本提高
修改之后，进入到MXFlutter目录，执行 flutter run 发现编译错误
咨询了下，mxflutter需要flutter为 用Flutter 1.20.3 版本
进入flutter目录，执行 git checkout tags/1.20.3
再回到mxflutter，执行clean
flutter clean
flutter pub get
再执行
flutter run
? mxflutter git:(master) ? flutter run Launching lib/main.dart on iPad Pro (12.9-inch) (4th generation) in debug mode... Running pod install... 16.7s Running Xcode build... └─Compiling, linking and signing... 12.4s Xcode build done. 35.3s Waiting for iPad Pro (12.9-inch) (4th generation) to report its views... 4ms Syncing files to device iPad Pro (12.9-inch) (4th generation)... 632ms
结果