在拉下松爺更新的Podfile後，嘗試用pod update更新，結果出現下面錯誤
$pod update Update all pods Analyzing dependencies [!] Unable to satisfy the following requirements: - `JSQMessagesViewController (~> 6.1.0)` required by `Podfile`
沒什麼頭緒，嘗試查一下版本
$pod list | grep JSQM JSQMessagesViewController 6.0.0
JSQMessagesViewController主頁明明標了已經是6.1.1，是不是版本庫有本地緩存，在pod --help加google下，發現命令pod
repo update，果斷運行一下，卡住，加上–verbose
$pod repo update --verbose $ /usr/bin/git rev-parse >/dev/null 2>&1 Updating spec repo `master` $ /usr/bin/git pull --ff-only error: Your local changes to the following files would be overwritten by merge: CocoaPods-version.yml Specs/AdMobMediationAdapterMMedia/1.5.0/AdMobMediationAdapterMMedia.podspec.json Please, commit your changes or stash them before you can merge. error: The following untracked working tree files would be overwritten by merge: Specs/AAShareBubbles/1.1.0/AAShareBubbles.podspec.json ...[略去n行] Specs/AQSEvent/0.2.0/AQSE Aborting Updating da90008..86016e3 [!] CocoaPods was not able to update the `master` repo. If this is an unexpected issue and persists you can inspect it running `pod repo update --verbose`
果然本地有緩存，還是git管理的，更新時衝突，google了一下，找到相關資料：
1.http://stackoverflow.com/questions/19477178/cocoapods-error-during-pod-update
2.http://blog.cocoapods.org/Repairing-Our-Broken-Specs-Repository/
解決方法：刪除本地緩存，重新setup
$rm -fr ~/.cocoapods/repos/master $pod setup
原文鏈接：http://yongyao.li/blog/article/repair-broken-cocoapods-specs-repository