低版本XCode安装高版本系统的iPhone/iPad

1.下载DeviceSupport,下载地址https://github.com/iGhibli/iOS-DeviceSupport/tree/master/DeviceSupport
2.将下载的文件解压,放到/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport目录
3.重启XCode,编译安装