在iPhone上确定用户是否启用了推送通知

对于iOS7及以下版本，您确实应该使用enabledRemoteNotificationTypes并检查它是否等于（或不等于，这取决于您的需求）UIRemoteNotificationTypeNone。

但是对于iOS8，并不总是仅通过检查isRegisteredForRemoteNotifications就足够了，正如许多人所述。您还应该检查application.currentUserNotificationSettings.types是否等于（或不等于，这取决于您的需求）UIUserNotificationTypeNone！

isRegisteredForRemoteNotifications可能会返回true，即使currentUserNotificationSettings.types返回UIUserNotificationTypeNone。

我尝试使用@Shaheen Ghiassy提供的解决方案支持iOS 10及以上版本，但发现了enabledRemoteNotificationTypes的剥夺问题。因此，我使用isRegisteredForRemoteNotifications替代了enabledRemoteNotificationTypes，后者在iOS 8中已经过时。下面是我的更新解决方案，对我完美地起作用：

- (BOOL)notificationServicesEnabled {
    BOOL isEnabled = NO;
    if ([[UIApplication sharedApplication] respondsToSelector:@selector(currentUserNotificationSettings)]){
        UIUserNotificationSettings *notificationSettings = [[UIApplication sharedApplication] currentUserNotificationSettings];

        if (!notificationSettings || (notificationSettings.types == UIUserNotificationTypeNone)) {
            isEnabled = NO;
        } else {
            isEnabled = YES;
        }
    } else {

        if ([[UIApplication sharedApplication] isRegisteredForRemoteNotifications]) {
            isEnabled = YES;
        } else{
            isEnabled = NO;
        }
    }
    return isEnabled;
}

我们可以轻松地调用此函数并访问其Bool值，并通过以下方式将其转换为字符串值：

NSString *str = [self notificationServicesEnabled] ? @"YES" : @"NO";

希望这也能帮助其他人 :) 愉快编码。

UIRemoteNotificationType types = [[UIApplication sharedApplication] enabledRemoteNotificationTypes];
if (types & UIRemoteNotificationTypeAlert)
    // blah blah blah
{
    NSLog(@"Notification Enabled");
}
else
{
    NSLog(@"Notification not enabled");
}

在这里，我们从UIApplication获取UIRemoteNotificationType。它代表了此应用程序在设置中的推送通知状态，您可以轻松地检查其类型。

虽然 Zac 的回答在 iOS 7 之前是完全正确的，但自从 iOS 8 推出以来就发生了改变。因为从 iOS 8 开始，enabledRemoteNotificationTypes 已被弃用。对于 iOS 8 及更高版本，您需要使用 isRegisteredForRemoteNotifications。

• iOS 7 及之前版本 --> 使用 enabledRemoteNotificationTypes
• iOS 8 及之后版本 --> 使用 isRegisteredForRemoteNotifications。

This Swifty解决方案在iOS8+上对我非常有效。
方法：

func isNotificationEnabled(completion:@escaping (_ enabled:Bool)->()){
    if #available(iOS 10.0, *) {
        UNUserNotificationCenter.current().getNotificationSettings(completionHandler: { (settings: UNNotificationSettings) in
            let status =  (settings.authorizationStatus == .authorized)
            completion(status)
        })
    } else {
        if let status = UIApplication.shared.currentUserNotificationSettings?.types{
            let status = status.rawValue != UIUserNotificationType(rawValue: 0).rawValue
            completion(status)
        }else{
            completion(false)
        }
    }
}

用法:

isNotificationEnabled { (isEnabled) in
            if isEnabled{
                print("Push notification enabled")
            }else{
                print("Push notification not enabled")
            }
        }

Ref

在 Xamarin 中，以上所有的解决方案对我都不起作用。 以下是我使用的：

public static bool IsRemoteNotificationsEnabled() {
    return UIApplication.SharedApplication.CurrentUserNotificationSettings.Types != UIUserNotificationType.None;
}

在设置中更改通知状态后，它也会进行实时更新。

以下是在Xamarin.ios中执行此操作的方法。

public class NotificationUtils
{
    public static bool AreNotificationsEnabled ()
    {
        var settings = UIApplication.SharedApplication.CurrentUserNotificationSettings;
        var types = settings.Types;
        return types != UIUserNotificationType.None;
    }
}

如果你只支持iOS 10及以上版本，那就选择使用UNUserNotificationCenter方法。

回复：

这是正确的

if (types & UIRemoteNotificationTypeAlert)

但是以下写法也是正确的！（因为UIRemoteNotificationTypeNone等于0）

if (types == UIRemoteNotificationTypeNone) 

请看下面。

NSLog(@"log:%d",0 & 0); ///false
NSLog(@"log:%d",1 & 1); ///true
NSLog(@"log:%d",1<<1 & 1<<1); ///true
NSLog(@"log:%d",1<<2 & 1<<2); ///true
NSLog(@"log:%d",(0 & 0) && YES); ///false
NSLog(@"log:%d",(1 & 1) && YES); ///true
NSLog(@"log:%d",(1<<1 & 1<<1) && YES); ///true
NSLog(@"log:%d",(1<<2 & 1<<2) && YES); ///true

完整的易于复制和粘贴的代码，基于@ZacBowling的解决方案构建（https://dev59.com/AHI_5IYBdhLWcg3wEe5u#1535427）

这也将带用户到您的应用程序设置，并允许他们立即启用

我还添加了一个检查位置服务是否已启用的解决方案（并将其带到设置中）

// check if notification service is enabled
+ (void)checkNotificationServicesEnabled
{
    if (![[UIApplication sharedApplication] isRegisteredForRemoteNotifications])
    {
        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Notification Services Disabled!"
                                                            message:@"Yo don't mess around bro! Enabling your Notifications allows you to receive important updates"
                                                           delegate:self
                                                  cancelButtonTitle:@"Cancel"
                                                  otherButtonTitles:@"Settings", nil];

        alertView.tag = 300;

        [alertView show];

        return;
    }
}

// check if location service is enabled (ref: https://dev59.com/zGUp5IYBdhLWcg3woonS#35982887)
+ (void)checkLocationServicesEnabled
{
    //Checking authorization status
    if (![CLLocationManager locationServicesEnabled] || [CLLocationManager authorizationStatus] == kCLAuthorizationStatusDenied)
    {

        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Location Services Disabled!"
                                                            message:@"You need to enable your GPS location right now!!"
                                                           delegate:self
                                                  cancelButtonTitle:@"Cancel"
                                                  otherButtonTitles:@"Settings", nil];

        //TODO if user has not given permission to device
        if (![CLLocationManager locationServicesEnabled])
        {
            alertView.tag = 100;
        }
        //TODO if user has not given permission to particular app
        else
        {
            alertView.tag = 200;
        }

        [alertView show];

        return;
    }
}

// handle bringing user to settings for each
+ (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{

    if(buttonIndex == 0)// Cancel button pressed
    {
        //TODO for cancel
    }
    else if(buttonIndex == 1)// Settings button pressed.
    {
        if (alertView.tag == 100)
        {
            //This will open ios devices location settings
            [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"prefs:root=LOCATION_SERVICES"]];
        }
        else if (alertView.tag == 200)
        {
            //This will open particular app location settings
            [[UIApplication sharedApplication] openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]];
        }
        else if (alertView.tag == 300)
        {
            //This will open particular app location settings
            [[UIApplication sharedApplication] openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]];
        }
    }
}

祝你好运！