$ pod install --no-repo-update Analyzing dependencies [!] CocoaPods could not
find compatible versions for pod "XXXXX": In snapshot (Podfile.lock): XXXXX (=
1.3.1) In Podfile: XXXXX None of your spec sources contain a spec satisfying
the dependencies: `XXXXX, XXXXXX (= 1.3.1)`. You have either: * out-of-date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.

按提示信息update后即可,pod repo update