升级到XCode 10后出现如下错误：
1、错误1：xx.app
:-1: Multiple commands produce '/Users/user/Library/Developer/Xcode/DerivedData/xxx-gkttrflwrjbhrcfecpzefanisuxz/Build/Products/Debug-iphonesimulator/xx.app':
1)Target 'xxx' has create directory command with output '/Users/user/Library/Developer/Xcode/DerivedData/xxx-gkttrflwrjbhrcfecpzefanisuxz/Build/Products/Debug-iphonesimulator/xx.app'
2)That command depends on command in Target 'xxx': script phase“[CP]Copy Pods Resources”
分析得到，错误发生在[CP] Copy Pods Resources，且与output有关。
解决方案：根据提示信息，选中对应的target -> Build Phases -> [CP] Copy Pods Resources -> Output Files -> 移除${TARGET_BUILD_DIR}/${UNLOCALIZED_RESOURCES_FOLDER_PATH} -> build
2、错误2：Info.plist
:-1: Multiple commands produce '/Users/user/Library/Developer/Xcode/DerivedData/xxx-exfgtfjwbnuxosetescfonvyzrns/Build/Products/Debug-iphoneos/dtkeyboard.appex/Info.plist':
1)Target 'xxx'(project 'xxx')has copy command from '/Users/xulefeng/Documents/Biu/zhuangbility/dtkeyboard/Info.plist' to '/Users/xulefeng/Library/Developer/Xcode/DerivedData/xxx-exfgtfjwbnuxosetescfonvyzrns/Build/Products/Debug-iphoneos/dtkeyboard.appex/Info.plist'
2)Target 'xxx'(project 'xxx')has process command with output '/Users/xulefeng/Library/Developer/Xcode/DerivedData/xxx-exfgtfjwbnuxosetescfonvyzrns/Build/Products/Debug-iphoneos/dtkeyboard.appex/Info.plist'
解决方案：根据提示信息，选中对应的target-> Build Phases -> Copy Bundle Resource -> 移除Info.plist
