pod use "MessageDisplayKit"報錯，

ld: 13 duplicate symbols for architecture x86_64 clang: error: linker command failed with exit code 、

podFile 裏

source 'https://github.com/CocoaPods/Specs'

platform:ios,'6.0'

  pod 'PathCover', '~> 0.1.2'

  pod 'XHImageViewer', '~> 0.1.2'

  pod 'XHRefreshControl', '~> 3.8'

  pod 'MessageDisplayKit', '~> 3.0.0'

因爲重複引用了

  pod 'PathCover', '~> 0.1.2'

  pod 'XHImageViewer', '~> 0.1.2'

  pod 'XHRefreshControl', '~> 3.8'

刪除後，pod update ok