在iOS 8上启用远程通知类型

在iOS 7中，我可以通过以下方式检索用户启用的通知类型：

NSUInteger rntypes = [[UIApplication sharedApplication] enabledRemoteNotificationTypes];

但在iOS 8上，我无法做到这一点，因为我在控制台中得到：

enabledRemoteNotificationTypes is not supported in iOS 8.0 and later.

我找到了一种检查iOS 8上是否启用通知的方法：

[[UIApplication sharedApplication] isRegisteredForRemoteNotifications]

---

但是如何检索iOS 7中启用的通知类型？

根据developer.apple.com，您可以使用此UIApplication的方法：

- (UIUserNotificationSettings *)currentUserNotificationSettings

然后使用以下命令检查通知类型：

@property (nonatomic, readonly) UIUserNotificationType types;

所以会是这样的：

UIUserNotificationSettings *settings = [[UIApplication sharedApplication] currentUserNotificationSettings];
UIUserNotificationType types = settings.types;

---

我也有同样的问题，我发现types属性基本上是一个位掩码。以下是如何提取信息。 我的例子是斯威夫特

    let settings = UIApplication.sharedApplication().currentUserNotificationSettings()

    if settings.types.rawValue & UIUserNotificationType.Alert.rawValue == UIUserNotificationType.Alert.rawValue
    {
       // can receive alert!
    }
    else
    {
       // if the user is not even able to receive alerts, show him a hint on how to reenable notifications in system settings
    }

    if settings.types.rawValue & UIUserNotificationType.Badge.rawValue == UIUserNotificationType.Badge.rawValue
    {
        // can receive badge!
    }
    if settings.types.rawValue & UIUserNotificationType.Sound.rawValue == UIUserNotificationType.Sound.rawValue
    {
        // can receive sound!
    }