对讲机快速推送通知

Question

我正在尝试注册一个应用程序，用于对讲机推送通知。他们这里有指示：https://docs.intercom.io/Install-on-your-mobile-product/enabling-push-notifications-with-intercom-for-ios

他们在obj c中给出了这段代码，但我的应用程序速度很快，这在我看来像是胡言乱语：

- (void)applicationDidBecomeActive:(UIApplication *)application {    
    if ([application respondsToSelector:@selector(registerUserNotificationSettings:)]){ // iOS 8 (User notifications)
        [application registerUserNotificationSettings:
         [UIUserNotificationSettings settingsForTypes:
          (UIUserNotificationTypeBadge |
           UIUserNotificationTypeSound |
           UIUserNotificationTypeAlert)
                                           categories:nil]];
        [application registerForRemoteNotifications];
    } else { // iOS 7 (Remote notifications)
        [application registerForRemoteNotificationTypes:
         (UIRemoteNotificationType)
         (UIRemoteNotificationTypeBadge |
          UIRemoteNotificationTypeSound |
          UIRemoteNotificationTypeAlert)];
    }
}

有人能解释一下如何快速完成这一过程吗？

Answer 1

下面的代码通过使用Swift 2中添加的新可用性特性在Xcode 7.1上工作

if #available(iOS 8, *) {
    application.registerUserNotificationSettings(
            UIUserNotificationSettings(forTypes: UIUserNotificationType(rawValue: UIUserNotificationType.Badge.rawValue |
                UIUserNotificationType.Sound.rawValue |
                UIUserNotificationType.Alert.rawValue),
            categories: nil))
} else {
    application.registerForRemoteNotificationTypes(
        UIRemoteNotificationType(rawValue: UIRemoteNotificationType.Badge.rawValue |
        UIRemoteNotificationType.Alert.rawValue |
        UIRemoteNotificationType.Sound.rawValue))
}