今天从svn下载下来的工程运行pod install安装后遇到的问题。
问题1
Multiple commands produce '/Users/hml/Library/Developer/Xcode/DerivedData/ByTalk-ggqcplakcssjghegvezbxqgzgjzp/Build/Products/Debug-iphoneos/ByTalk.app/Info.plist':
- Target 'ByTalk' (project 'ByTalk') has copy command from '/Users/hml/Desktop/SVN_Project/ByTalk/ByTalkSDK/Info.plist' to '/Users/hml/Library/Developer/Xcode/DerivedData/ByTalk-ggqcplakcssjghegvezbxqgzgjzp/Build/Products/Debug-iphoneos/ByTalk.app/Info.plist'
- Target 'ByTalk' (project 'ByTalk') has process command with output '/Users/hml/Library/Developer/Xcode/DerivedData/ByTalk-ggqcplakcssjghegvezbxqgzgjzp/Build/Products/Debug-iphoneos/ByTalk.app/Info.plist'
解决办法，找到重复数据删除，参考https://stackoverflow.com/questions/50718018/xcode-10-error-multiple-commands-produce
解决方法1.png
问题2
Use of undeclared identifier 'MJExtensionSemaphoreWait'
问题2.png
通过查找，头文件#import "BTFMJExtensionConst.h" 中已经包含MJExtensionSemaphoreWait，
解决方法：通过修改头文件位置问题改好。
解决方法2.png
问题3
ld: framework not found Reachability
clang:error: linker commmand failed with exit code 1 (user -v to see invacation)
问题3.png
解决方法：
target->Build Settings->Other Linker Flags 中找到出错的文件删除
解决方法3.png
问题4
pod install 时一直出错
LibreSSL SSL_connect: SSL_ERROR_SYSCALL in connection to GitHub.com:443
问题4.png
解决方法：
网络问题，网络超时，pod install很多次，把所有库文件都下载下来。
