今天更新CocoaPads的時候突然遇到以下問題，而且感覺pch文件一下子不管用了，在此記錄一下：

[!] CocoaPods could not find compatible versions for pod "MJRefresh":In snapshot (Podfile.lock):MJRefresh (= 3.1.15.3)In Podfile:MJRefreshNone of your spec sources contain a spec satisfying the dependencies: `MJRefresh, MJRefresh (= 3.1.15.3)`.You have either:* out-of-date source repos which you can update with `pod repo update` or with `pod install --repo-update`.* mistyped the name or version.* not added the source repo that hosts the Podspec to your Podfile.Note: as of CocoaPods 1.0, `pod repo update` does not happen on `pod install` by default.

解決方法：把.xcworkspace和Podfile.lock文件刪除，重新pod install一下就好了.

鏈接：https://www.jianshu.com/p/1950da79b79b

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