升级xcode 10.0之后项目出了许多的红色错误
报这个错误就是去tagets 里Build Phases下 [CP]copy pods Resources 删除下面
然后又会报错 ld: library not found for -lstdc++.6.0.9（xcode升级之后这些库不存在，项目里添加的这库要移除）
1>在TARGETS ---->General ------>Linked Frameworks and Libraries 下移除libstdc++.6.0.9.tdb库
2>在TARGETS ---->Build Settings ------>Other Linker Flages 下移除libstdc++.6.0.9.tdb这个库的标识链接
如果依赖c++6.0.9的SDK是第三方SDK，需要联系第三方，等待第三方更新
如果是自己的文件引用了c++，请替换对c++库的使用，重新编译。
同时还会出现其他的问题，仅供参考
升级完Xcode，编辑运行的时候发现报了一些错误（如下）：
问题如下：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：按照下面的解决步骤一步一步来。
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'
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。