// IOS8 新系统需要使用新的代码

   if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0) 

   { 

       [[UIApplication sharedApplication] registerUserNotificationSettings:[UIUserNotificationSettings 

                                                                            settingsForTypes:(UIUserNotificationTypeSound |UIUserNotificationTypeAlert | UIUserNotificationTypeBadge) 

                                                                            categories:nil]]; 

       [[UIApplication sharedApplication] registerForRemoteNotifications]; 

   } 

   else 

   { 

       //ios7注册推送通知 

       [[UIApplication sharedApplication] registerForRemoteNotificationTypes: 

        (UIUserNotificationTypeBadge | UIUserNotificationTypeSound | UIUserNotificationTypeAlert)]; 

   }