2.0.6版本引用不到啊

[wubangjunjava]

pod 'YCDownloadSession', '~> 2.0.6', :subspecs => ['Core', 'Mgr']

[!] CocoaPods could not find compatible versions for pod "YCDownloadSession/Mgr":
In Podfile:
YCDownloadSession/Mgr (~> 2.0.6)

None of your spec sources contain a spec satisfying the dependency: YCDownloadSession/Mgr (~> 2.0.6).

You have either:

• mistyped the name or version.
• not added the source repo that hosts the Podspec to your Podfile.