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* out-of-date source repos which you can update with `pod repo update` or with `pod install --repo-update`.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