https://www.jianshu.com/p/12558d39ba08
先默念别有太多坑啊
跑起来吧
结果没有跑起来
1.第一个坑
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:-1: Multiple commands produce '/Users/wanglei/Library/Developer/Xcode/DerivedData/JMTAPP-grwqpsineudpywaswwtdjudjpkwm/Build/Products/Debug-iphonesimulator/JMTAPP.app':
1) Target 'JMTAPP' has create directory command with output '/Users/wanglei/Library/Developer/Xcode/DerivedData/JMTAPP-grwqpsineudpywaswwtdjudjpkwm/Build/Products/Debug-iphonesimulator/JMTAPP.app'
2) That command depends on command in Target 'JMTAPP': script phase “[CP] Copy Pods Resources”
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英语不好，隐约中感觉是跟Pod有关系，但是抓住了output 和[CP] Copy Pods Resources关键字，摸索一番之后，得到了解决办法
TARGETS --> Build Phases --> [CP] Copy Pods Resources --> Output Files 删除 ${TARGET_BUILD_DIR}/${UNLOCALIZED_RESOURCES_FOLDER_PATH}
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结果如下：
3
好的接着跑
2.第二个坑
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:-1: Multiple commands produce '/Users/wanglei/Library/Developer/Xcode/DerivedData/JMTAPP-grwqpsineudpywaswwtdjudjpkwm/Build/Products/Debug-iphonesimulator/JMTAPP.app/Info.plist':
1) Target 'JMTAPP' (project 'JMTAPP') has copy command from '/Users/wanglei/Desktop/iosv2.1 2/JMTAPP/Info.plist' to '/Users/wanglei/Library/Developer/Xcode/DerivedData/JMTAPP-grwqpsineudpywaswwtdjudjpkwm/Build/Products/Debug-iphonesimulator/JMTAPP.app/Info.plist'
2) Target 'JMTAPP' (project 'JMTAPP') has process command with output '/Users/wanglei/Library/Developer/Xcode/DerivedData/JMTAPP-grwqpsineudpywaswwtdjudjpkwm/Build/Products/Debug-iphonesimulator/JMTAPP.app/Info.plist'
字面意思，说是info.plist 文件重复了
两种解决方案：
1 设置workspace
xcode -> file -> WorkSpace Settings ->BuildSystem -> 选择 Legacy Build System
4
2 删除info.plist 文件
TARGETS --> Build Phases --> Copy Bundle Resources --> 删除info.plist
3.第三个坑
犹豫项目比较老，很多第三方库不能用了
Pods/ObjectMapper/Sources/EnumOperators.swift:35:13: Invalid redeclaration of '<-'
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红的报的我想哭
尝试更新第三方库试试
pod update ObjectMapper --verbose --no-repo-update
pod update HandyJSON --verbose --no-repo-update
4.第四个坑
ld: library not found for -lstdc++.6.0.9
linker command failed with exit code 1 (use -v to see invocation)
项目里用了阿里百川的反馈，用了这个依赖库，
字面意思，缺失c++依赖库，苹果在XCode10和iOS12中移除了libstdc++这个库，由libc++这个库取而代之，
苹果的官方解释是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。
这个好解决，缺失库，我就从xcode9里面把这些库复制过来。
Xcode -> 显示包内容->Contents->Developer->Platforms->iPhoneOS.platform(模拟器是iPhoneSimulator.platform)->Developer->SDKS->iPhoneOS.sdk->usr->lib
然后真机运行，成功
5.第五个坑
继续上面的第四个坑啊，真机运行是OK的，但是模拟器运行，编译通过后却崩溃了。
6
看得出错提示说是.dylib与这个模拟器不符合。
这个问题，要么在Xcode10里面安装iOS11的模拟器运行环境，要么就是跟厂家联系，进行升级。
更新
找到了Xcode10模拟器和真机运行的办法了
1.将libstdc++_sim.zip解压，放到目录
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/lib/
将 libstdc++.dylib_sim.zip 解压，放到目录
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/
总结
趟坑之路先写到这里，期间也遇到了以前同事写的代码过于臃肿，Xcode10识别不出来的问题，这都是小问题，就不赘述了，报的错误如下，有这个相似经历的，稍微修改一下就可以了。
The compiler is unable to type-check this expression in reasonable time; try breaking up the expression into distinct sub-expressions
欢迎各位大佬，批评指正和建议。
作者：王垒iOS
链接：https://www.jianshu.com/p/12558d39ba08
来源：简书
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