iOS build Faild

1. https://www.jianshu.com/p/8a8444acdca5

问题出现了：Target '**' has create directory command with output '/Users/tl/Library/Developer/Xcode/DerivedData/Build/Products/Debug-iphoneos/xxxx.app’

解决：修改build system

在Xcode菜单栏 -> File -> Workspace Setting，将build system修改为legacy build system，然后clean后编译。