升級Xcode 11.2 後報錯： Multiple commands produce 的解決辦法

報錯日誌：

Multiple commands produce '/Users/tjsoft/Library/Developer/Xcode/DerivedData/TYKYTwoLearnOneDo-amcfzswumxdotlgjwdslugmywxch/Build/Products/Debug-iphoneos/xxx.app/Info.plist': 1) Target 'TYKYTwoLearnOneDo' (project 'TYKYTwoLearnOneDo') has copy command from '/Users/tjsoft/Library/Developer/Xcode/DerivedData/TYKYTwoLearnOneDo-amcfzswumxdotlgjwdslugmywxch/Build/Products/Debug-iphoneos/xxx.app/Info.plist' 2) Target 'TYKYTwoLearnOneDo' (project 'TYKYTwoLearnOneDo') has process command with output '/Users/tjsoft/Library/Developer/Xcode/DerivedData/TYKYTwoLearnOneDo-amcfzswumxdotlgjwdslugmywxch/Build/Products/Debug-iphoneos/xxx.app/Info.plist'

 

這是因爲在新版本的xcode增加了一種新的new build system構建方式。但是可能與之前的項目構建有衝突。 

依次打開xcode->file-project/workspace settting 裏面，將build system 更改爲Legacy build system,然後重新運行項目即可。