升级完Xcode，编辑运行的时候发现报了一些错误（如下）。
问题零：Showing Recent Messages
:-1: Multiple commands produce '/Users/xx/Library/Developer/Xcode/DerivedData/xxx-enekjocpeavqtedhdmtdevxeaemj/Build/Products/Debug-iphonesimulator/xxx.app':
1) Target 'xxx' has create directory command with output '/Users/xx/Library/Developer/Xcode/DerivedData/xxx-enekjocpeavqtedhdmtdevxeaemj/Build/Products/Debug-iphonesimulator/xxx.app'
2) That command depends on command in Target 'xxx': script phase “[CP] Copy Pods Resources”
解决方法：我是按照这篇文章步骤做的。
问题一：Showing Recent Messages
:-1: Multiple commands produce '/Users/xx/Library/Developer/Xcode/DerivedData/xxx-dnzktflfdnohzveyiyzjeqhgewlh/Build/Products/Debug-iphonesimulator/xxx.app/README.md':
1) Target 'xxx' (project 'xxx') has copy command from '/Users/xx/xxx/xxx/Classes/Other/Lib/YYCache/README.md' to '/Users/xx/Library/Developer/Xcode/DerivedData/xxx-dnzktflfdnohzveyiyzjeqhgewlh/Build/Products/Debug-iphonesimulator/xxx.app/README.md'
2) Target 'xxx' (project 'xxx') has copy command from '/Users/xx/xx/xxx/Classes/Other/Lib/YYImage/README.md' to '/Users/xx/Library/Developer/Xcode/DerivedData/xxx-dnzktflfdnohzveyiyzjeqhgewlh/Build/Products/Debug-iphonesimulator/xxx.app/README.md'
3) Target 'xxx' (project 'xxx') has copy command from '/Users/xx/xx/xxx/Classes/Other/Lib/YYWebImage/README.md' to '/Users/xx/Library/Developer/Xcode/DerivedData/xxx-dnzktflfdnohzveyiyzjeqhgewlh/Build/Products/Debug-iphonesimulator/xxx.app/README.md'
解决方法：Bulid Phases —> Copy Bundle Reasources 然后找到 “YYCache/README.md”、“YYImage/README.md”和“YYWebImage/README.md”，将他们删掉就行了。
问题二：Showing Recent Messages
:-1: Multiple commands produce '/Users/xx/Library/Developer/Xcode/DerivedData/xxx-dnzktflfdnohzveyiyzjeqhgewlh/Build/Products/Debug-iphonesimulator/xxx.app/Info.plist':
1) Target 'xxx' (project 'xxx') has copy command from '/Users/xx/xx/xxx/Classes/Other/Lib/MDSocketRocket/Resources/Info.plist' to '/Users/xx/x/Developer/Xcode/DerivedData/xxx-dnzktflfdnohzveyiyzjeqhgewlh/Build/Products/Debug-iphonesimulator/xxx.app/Info.plist'
2) Target 'xxx' (project 'xxx') has process command with output '/Users/xx/Library/Developer/Xcode/DerivedData/xxx-dnzktflfdnohzveyiyzjeqhgewlh/Build/Products/Debug-iphonesimulator/xxx.app/Info.plist'
解决方法：Bulid Phases —> Copy Bundle Reasources 然后找到 plist文件，将其删掉就行了。
问题三：Showing Recent Messages
:-1: Multiple commands produce '/Users/xx/Library/Developer/Xcode/DerivedData/xxx-dnzktflfdnohzveyiyzjeqhgewlh/Build/Products/Debug-iphonesimulator/xxx.app/LICENSE':
1) Target 'xxx' (project 'xxx') has copy command from '/Users/xx/xx/RZSJApp/Classes/Other/Lib/YYCache/LICENSE' to '/Users/xx/Library/Developer/Xcode/DerivedData/xxx-dnzktflfdnohzveyiyzjeqhgewlh/Build/Products/Debug-iphonesimulator/xxx.app/LICENSE'
2) Target 'xxx' (project 'xxx') has copy command from '/Users/xx/xx/xxx/Classes/Other/Lib/YYImage/LICENSE' to '/Users/xx/Library/Developer/Xcode/DerivedData/xxx-dnzktflfdnohzveyiyzjeqhgewlh/Build/Products/Debug-iphonesimulator/xxx.app/LICENSE'
3) Target 'xxx' (project 'xxx') has copy command from '/Users/xx/xx/xxx/Classes/Other/Lib/YYWebImage/LICENSE' to '/Users/xx/Library/Developer/Xcode/DerivedData/xxx-dnzktflfdnohzveyiyzjeqhgewlh/Build/Products/Debug-iphonesimulator/xxx.app/LICENSE'
解决方法：Bulid Phases —> Copy Bundle Reasources 然后找到 “YYCache/LICENSE”、“YYImage/LICENSE”和“YYWebImage/LICENSE”，将他们删掉就行了。