Unable to satisfy the following requirements

Analyzing dependencies[!] 
Unable to satisfy the following requirements:
- `JSQMessagesViewController (~> 6.1.0)` required by `Podfile`

    用cocoapods更新第三方时出现以上错误,解决方法:

    删除本地缓存:

rm -fr ~/.cocoapods/repos/master

    重新setup:

pod setup


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