Xcode10打开之前的项目报 Multiple commands produce '/Users/.../Library/Developer/Xcode/DerivedData/...

解决方法如下:
1:打开菜单栏File,点击Workspace settings

Xcode10打开之前的项目报 Multiple commands produce '/Users/.../Library/Developer/Xcode/DerivedData/..._第1张图片
屏幕快照 2018-09-20 下午4.20.02.png

2、点击build system


Xcode10打开之前的项目报 Multiple commands produce '/Users/.../Library/Developer/Xcode/DerivedData/..._第2张图片
屏幕快照 2018-09-20 下午4.20.14.png

3、将选择修改 Legacy Build system


Xcode10打开之前的项目报 Multiple commands produce '/Users/.../Library/Developer/Xcode/DerivedData/..._第3张图片
屏幕快照 2018-09-20 下午4.20.24.png

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