想知道ios5和ios6中通知中心的状态是处于“ON”还是“OFF”状态 [英]want to know the state of the Notification center whether is in "ON" or "OFF" state in ios5 and ios6
适用于ios 4,ios 5和ios6的Apple Push Notification服务是否有任何更改? [英]Is there any changes in Apple Push Notification service for ios 4, ios 5 and ios6?