iOS 错误汇总

1. Xcode11.2编译报错，报错如下

error: Multiple comands product 'xxx/Info.plist'
1)Target'xxx'(project 'xxx') has copy command from 'xxx/Info.plist'
2)Target'xxx'(project 'xxx') has process command with output 'xxx/Info.plist'

解决:

2. xcode编译报错，报错如下

undef: _res_9_getservers
undef: _res_9_ninit
undef: _res_9_ndestroy

解决:
在Build Phases，新增库libresolv

3. pod install报错，报错如下

$ pod install
Analyzing dependencies
[!] CDN: trunk Repo update failed - 2 error(s):
CDN: trunk URL couldn't be downloaded: https://raw.githubusercontent.com/CocoaPods/Specs/master/Specs/4/a/4/fishhook/0.1/fishhook.podspec.json Response: Timeout was reached
CDN: trunk URL couldn't be downloaded: https://raw.githubusercontent.com/CocoaPods/Specs/master/Specs/4/a/4/fishhook/0.2/fishhook.podspec.json Response: Timeout was reached

解决：

1. podfile文件中添加指定source源为master，并保存
   source 'https://github.com/CocoaPods/Specs.git'
2. 终端执行移除trunk源
   pod repo remove trunk
3. 执行完成之后，再执行pod searchorpod install可以正常进行
4. podfile文件中一定要指定master源，因为现在默认是trunk源
   source 'https://github.com/CocoaPods/Specs.git'