即将离开知乎
您即将离开知乎,请注意您的帐号和财产安全。
https://developer.apple.com/library/prerelease/ios/documentation/General/Conceptual/ExtensibilityPG/NotificationCenter.html
您即将离开知乎,请注意您的帐号和财产安全。
https://developer.apple.com/library/prerelease/ios/documentation/General/Conceptual/ExtensibilityPG/NotificationCenter.html