CocoaPods could not find compati

今天接到，新项目CocoaPads的时候，需要以下问题：

[!] CocoaPods could not find compatible versions for pod "SDWebImage":
  In snapshot (Podfile.lock):
    SDWebImage (= 5.3.0)

  In Podfile:
    SDWebImage

None of your spec sources contain a spec satisfying the dependencies: `SDWebImage, SDWebImage (= 5.3.0)`.

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 * out-of-date source repos which you can update with `pod repo update` or with `pod install --repo-update`.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.

解决方法：把.xcworkspace和Podfile.lock文件删除，重新pod install一下就好了！