今天刚升级到Xcode10，迫不及待运行项目，结果1S我就回到冰点，爆红点。
网查发现解决方案。网查的时候发现还有个问题似乎出现概率也挺高的，我就汇总一下，节省之后可能浪费的时间。

雷区一、二是我自己出现的问题，其他还没有实测，如果没有解决你的问题，请自行找度娘。

雷区一：
Multiple commands produce

雷区1

error: Multiple commands produce '/Users/xiaoyuan/Library/Developer/Xcode/DerivedData/Boobuz-gnxeuntgkenwgdgycqnvabqubafh/Build/Products/Debug-iphoneos/Boobuz.app':
1) Target 'Boobuz' has create directory command with output '/Users/xiaoyuan/Library/Developer/Xcode/DerivedData/Boobuz-gnxeuntgkenwgdgycqnvabqubafh/Build/Products/Debug-iphoneos/Boobuz.app'
2) That command depends on command in Target 'Boobuz': script phase “[CP] Copy Pods Resources”

分析error内容，错误发生在Copy Pods Resources，而且与output有关，应该是使用了cocoapods导致的，尝试删除该项目target-Copy Pods Resources-Output Files，成功解决问题。
参考解决方案：Xcode 10 beta3 Error: Multiple commands produce

雷区二

雷区2

ld: library not found for -lstdc++.6.0.9
clang: error: linker command failed with exit code 1 (use -v to see invocation)

项目用到了c++，依赖了libstdc++.6.0.9.tbd,导致整个工程编译不通过，原因是苹果在XCode10和iOS12中移除了libstdc++这个库，由libc++这个库取而代之,苹果的解释是libstdc++已经标记为废弃有5年了，建议大家使用经过了llvm优化过并且全面支持C++11的libc++库。
"libc++" C++ Standard Library
libc++和libstdc++
接下来更新这个库就好了，TARGETS—>Build Phases—>Link Binary With Libraries()

stdc++.6.0.9

雷区三

:-1: Multiple commands produce '/Users/.../Library/Developer/Xcode/DerivedData/.../Build/Products/Dev-iphonesimulator/TLYShyNavBar/TLYShyNavBar.framework/Info.plist':
1) Target 'TLYShyNavBar' has copy command from '/Users/.../Desktop/Workspace/iOS/.../Pods/TLYShyNavBar/TLYShyNavBar/Info.plist' to '/Users/.../Library/Developer/Xcode/DerivedData/.../Build/Products/Dev-iphonesimulator/TLYShyNavBar/TLYShyNavBar.framework/Info.plist'
2) Target 'TLYShyNavBar' has process command with input '/Users/.../Desktop/Workspace/iOS/.../Pods/Target Support Files/TLYShyNavBar/Info.plist'

1. In Xcode, go to File->Project/Workspace settings.
2. Change the build system to Legacy Build system.
   参考解决方案：Xcode10 Multiple commands produced error

雷区四

雷区4