iOS 推送

// 将旧的推送从通知中心移除

[application setApplicationIconBadgeNumber:0];

#if !TARGET_IPHONE_SIMULATOR

// iOS8 注册推送

if ([application respondsToSelector:@selector(registerForRemoteNotifications)]) {
UIUserNotificationType types = UIUserNotificationTypeBadge | UIUserNotificationTypeAlert | UIUserNotificationTypeSound;
UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:types categories:nil];
[application registerForRemoteNotifications];
[application registerUserNotificationSettings:settings];
}

// iOS7 and before 注册推送

else {
[application registerForRemoteNotificationTypes:(UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound | UIRemoteNotificationTypeAlert)];

}

#endif

参考：http://www.blogjava.net/xiaomage234/archive/2014/06/18/414895.html