Swift ios 检查 ios9和 ios10中是否启用了远程推送通知

Updated answer after iOS 10 is using UNUserNotificationCenter .

First you need to import UserNotifications then

let current = UNUserNotificationCenter.current()
current.getNotificationSettings(completionHandler: { permission in
switch permission.authorizationStatus  {
case .authorized:
print("User granted permission for notification")
case .denied:
print("User denied notification permission")
case .notDetermined:
print("Notification permission haven't been asked yet")
case .provisional:
// @available(iOS 12.0, *)
print("The application is authorized to post non-interruptive user notifications.")
case .ephemeral:
// @available(iOS 14.0, *)
print("The application is temporarily authorized to post notifications. Only available to app clips.")
@unknown default:
print("Unknow Status")
}
})

this code will work till iOS 9, for iOS 10 use the above code snippet.

let isRegisteredForRemoteNotifications = UIApplication.shared.isRegisteredForRemoteNotifications
if isRegisteredForRemoteNotifications {
// User is registered for notification
} else {
// Show alert user is not registered for notification
}

I tried Rajat's solution, but it didn't work for me on iOS 10 (Swift 3). It always said that push notifications were enabled. Below is how I solved the problem. This says "not enabled" if the user has tapped "Don't Allow" or if you have not asked the user yet.

let notificationType = UIApplication.shared.currentUserNotificationSettings!.types
if notificationType == [] {
print("notifications are NOT enabled")
} else {
print("notifications are enabled")
}

PS: The method currentUserNotificationSettings was deprecated in iOS 10.0 but it's still working.

Apple recommends to use UserNotifications framework instead of shared instances. So, do not forget to import UserNotifications framework. As this framework is new in iOS 10 it's really only safe to use this code in apps building for iOS10+

let current = UNUserNotificationCenter.current()


current.getNotificationSettings(completionHandler: { (settings) in
if settings.authorizationStatus == .notDetermined {
// Notification permission has not been asked yet, go for it!
} else if settings.authorizationStatus == .denied {
// Notification permission was previously denied, go to settings & privacy to re-enable
} else if settings.authorizationStatus == .authorized {
// Notification permission was already granted
}
})

You may check official documentation for further information: https://developer.apple.com/documentation/usernotifications

@Rajat's answer is not enough.

• isRegisteredForRemoteNotifications is that your app has connected to APNS and get device token, this can be for silent push notification
• currentUserNotificationSettings is for user permissions, without this, there is no alert, banner or sound push notification delivered to the app

Here is the check

static var isPushNotificationEnabled: Bool {
guard let settings = UIApplication.shared.currentUserNotificationSettings
else {
return false
}


return UIApplication.shared.isRegisteredForRemoteNotifications
&& !settings.types.isEmpty
}

For iOS 10, instead of checking for currentUserNotificationSettings, you should use UserNotifications framework

center.getNotificationSettings(completionHandler: { settings in
switch settings.authorizationStatus {
case .authorized, .provisional:
print("authorized")
case .denied:
print("denied")
case .notDetermined:
print("not determined, ask user for permission now")
}
})

Push notification can be delivered to our apps in many ways, and we can ask for that

UNUserNotificationCenter.current()
.requestAuthorization(options: [.alert, .sound, .badge])

User can go to Settings app and turn off any of those at any time, so it's best to check for that in the settings object

open class UNNotificationSettings : NSObject, NSCopying, NSSecureCoding {




open var authorizationStatus: UNAuthorizationStatus { get }




open var soundSetting: UNNotificationSetting { get }


open var badgeSetting: UNNotificationSetting { get }


open var alertSetting: UNNotificationSetting { get }




open var notificationCenterSetting: UNNotificationSetting { get }
}

If your app supports iOS 10 and iOS 8, 9 use below code

// At the top, import UserNotifications
// to use UNUserNotificationCenter
import UserNotifications

Then,

if #available(iOS 10.0, *) {
let current = UNUserNotificationCenter.current()
current.getNotificationSettings(completionHandler: { settings in


switch settings.authorizationStatus {


case .notDetermined:
// Authorization request has not been made yet
case .denied:
// User has denied authorization.
// You could tell them to change this in Settings
case .authorized:
// User has given authorization.
}
})
} else {
// Fallback on earlier versions
if UIApplication.shared.isRegisteredForRemoteNotifications {
print("APNS-YES")
} else {
print("APNS-NO")
}
}

in iOS11, Swift 4...

 UNUserNotificationCenter.current().getNotificationSettings { (settings) in
if settings.authorizationStatus == .authorized {
// Already authorized
}
else {
// Either denied or notDetermined
UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound, .badge]) {
(granted, error) in
// add your own
UNUserNotificationCenter.current().delegate = self
let alertController = UIAlertController(title: "Notification Alert", message: "please enable notifications", preferredStyle: .alert)
let settingsAction = UIAlertAction(title: "Settings", style: .default) { (_) -> Void in
guard let settingsUrl = URL(string: UIApplicationOpenSettingsURLString) else {
return
}
if UIApplication.shared.canOpenURL(settingsUrl) {
UIApplication.shared.open(settingsUrl, completionHandler: { (success) in
})
}
}
let cancelAction = UIAlertAction(title: "Cancel", style: .default, handler: nil)
alertController.addAction(cancelAction)
alertController.addAction(settingsAction)
DispatchQueue.main.async {
self.window?.rootViewController?.present(alertController, animated: true, completion: nil)


}
}
}
}

Here's a solution for getting a string describing the current permission that works with iOS 9 trough iOS 11, with Swift 4. This implementation uses When for promises.

import UserNotifications


private static func getNotificationPermissionString() -> Promise<String> {
let promise = Promise<String>()


if #available(iOS 10.0, *) {
let notificationCenter = UNUserNotificationCenter.current()
notificationCenter.getNotificationSettings { (settings) in
switch settings.authorizationStatus {
case .notDetermined: promise.resolve("not_determined")
case .denied: promise.resolve("denied")
case .authorized: promise.resolve("authorized")
}
}
} else {
let status = UIApplication.shared.isRegisteredForRemoteNotifications ? "authorized" : "not_determined"
promise.resolve(status)
}


return promise
}

class func isRegisteredForRemoteNotifications() -> Bool {
if #available(iOS 10.0, *) {
var isRegistered = false
let semaphore = DispatchSemaphore(value: 0)
let current = UNUserNotificationCenter.current()
current.getNotificationSettings(completionHandler: { settings in
if settings.authorizationStatus != .authorized {
isRegistered = false
} else {
isRegistered = true
}
semaphore.signal()
})
_ = semaphore.wait(timeout: .now() + 5)
return isRegistered
} else {
return UIApplication.shared.isRegisteredForRemoteNotifications
}
}

Even though user doesn't allow the push notifications, the device token is available. So it would be also a good idea to check if it's allowed to receive the push notifications.

private func checkPushNotificationAllowed(completionHandler: @escaping (Bool) -> Void) {
if #available(iOS 10.0, *) {
UNUserNotificationCenter.current().getNotificationSettings { (settings) in
if settings.authorizationStatus == .notDetermined || settings.authorizationStatus == .denied {
completionHandler(false)
}
else {
completionHandler(true)
}
}
}
else {
if let settings = UIApplication.shared.currentUserNotificationSettings {
if settings.types.isEmpty {
completionHandler(false)
}
else {
completionHandler(true)
}
}
else {
completionHandler(false)
}
}
}

All answers above are almost correct BUT if you have push notifications enabled and all options disabled (alertSetting, lockScreenSetting etc.), authorizationStatus will be authorized and you won't receive any push notifications.

The most appropriate way to find out if you user can receive remote notifications is to check all these setting values. You can achieve it using extensions.

Note: This solution works for iOS 10+. If you support older versions, please read previous answers.

extension UNNotificationSettings {


func isAuthorized() -> Bool {
guard authorizationStatus == .authorized else {
return false
}


return alertSetting == .enabled ||
soundSetting == .enabled ||
badgeSetting == .enabled ||
notificationCenterSetting == .enabled ||
lockScreenSetting == .enabled
}
}

extension UNUserNotificationCenter {


func checkPushNotificationStatus(onAuthorized: @escaping () -> Void, onDenied: @escaping () -> Void) {
getNotificationSettings { settings in
DispatchQueue.main.async {
guard settings.isAuthorized() {
onDenied()
return
}


onAuthorized()
}
}
}
}

for iOS12 and Swift 4 also support iOS13 and Swift5 I also created a git for this you can check here

just add this singleton file in your XCode Project

import Foundation
import UserNotifications
import UIKit


class NotificaionStatusCheck {
    

    

var window: UIWindow?
    

private var currentViewController : UIViewController? = nil
    

    

static let shared = NotificaionStatusCheck()
    

public func currentViewController(_ vc: UIViewController?) {
self.currentViewController = vc
checkNotificationsAuthorizationStatus()
}
    

    

private func checkNotificationsAuthorizationStatus() {
let userNotificationCenter = UNUserNotificationCenter.current()
userNotificationCenter.getNotificationSettings { (notificationSettings) in
switch notificationSettings.authorizationStatus {
case .authorized:
print("The app is authorized to schedule or receive notifications.")
                

case .denied:
print("The app isn't authorized to schedule or receive notifications.")
self.NotificationPopup()
case .notDetermined:
print("The user hasn't yet made a choice about whether the app is allowed to schedule notifications.")
self.NotificationPopup()
case .provisional:
print("The application is provisionally authorized to post noninterruptive user notifications.")
self.NotificationPopup()
}
}
        

}
    

private func NotificationPopup(){
let alertController = UIAlertController(title: "Notification Alert", message: "Please Turn on the Notification to get update every time the Show Starts", preferredStyle: .alert)
let settingsAction = UIAlertAction(title: "Settings", style: .default) { (_) -> Void in
guard let settingsUrl = URL(string: UIApplication.openSettingsURLString) else {
return
}
if UIApplication.shared.canOpenURL(settingsUrl) {
UIApplication.shared.open(settingsUrl, completionHandler: { (success) in
})
}
}
let cancelAction = UIAlertAction(title: "Cancel", style: .default, handler: nil)
alertController.addAction(cancelAction)
alertController.addAction(settingsAction)
DispatchQueue.main.async {
self.currentViewController?.present(alertController, animated: true, completion: nil)
            

}
        

}
    

    

}

to access this code on ViewController user this on viewDidLoad

NotificaionStatusCheck.shared.currentViewController(self)

The new style with async await

 static func getPermissionState() async throws  {
let current = UNUserNotificationCenter.current()
        

let result = await current.notificationSettings()
switch result.authorizationStatus {
case .notDetermined:
//
case .denied:
//
case .authorized:
//
case .provisional:
//
case .ephemeral:
//
@unknown default:
//
}
       

}