didReceiveRemoteNotification 未调用，iOS 10
didReceiveRemoteNotification not called, iOS 10
在 iOS 9.3 中，didReceiveRemoteNotification 方法会在以下两种情况下被调用。
1) 收到推送通知时
2) 当用户通过点击通知启动应用程序时。
但是在 iOS 10，我注意到 didReceiveRemoteNotification 方法在用户通过点击通知启动应用程序时 NOT 触发。只有在收到通知时才会调用它。因此，应用程序从通知启动后，我无法执行任何进一步的操作。
解决这个问题的方法是什么？有什么想法吗？
类型转换
对于 Swift3
-
示例参见 this
import the UserNotifications framework and add the UNUserNotificationCenterDelegate in Appdelegate
import UserNotifications
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate,UNUserNotificationCenterDelegate
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
//create the notificationCenter
let center = UNUserNotificationCenter.current()
center.delegate = self
// set the type as sound or badge
center.requestAuthorization(options: [.sound,.alert,.badge, .providesAppNotificationSettings]) { (granted, error) in
// Enable or disable features based on authorization
}
application.registerForRemoteNotifications()
return true
}
func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
// let chars = UnsafePointer<CChar>((deviceToken as NSData).bytes)
var token = ""
for i in 0..<deviceToken.count {
//token += String(format: "%02.2hhx", arguments: [chars[i]])
token = token + String(format: "%02.2hhx", arguments: [deviceToken[i]])
}
print("Registration succeeded!")
print("Token: ", token)
}
func application(_ application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: NSError) {
print("Registration failed!")
}
receive the Notifications using this delegates
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (_ options: UNNotificationPresentationOptions) -> Void) {
print("Handle push from foreground")
// custom code to handle push while app is in the foreground
print("\(notification.request.content.userInfo)")
}
func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
print("Handle push from background or closed")
// if you set a member variable in didReceiveRemoteNotification, you will know if this is from closed or background
print("\(response.notification.request.content.userInfo)")
}
func userNotificationCenter(_ center: UNUserNotificationCenter, openSettingsFor notification: UNNotification?) {
let navController = self.window?.rootViewController as! UINavigationController
let notificationSettingsVC = NotificationSettingsViewController()
navController.pushViewController(notificationSettingsVC, animated: true)
}
有关更多信息，您可以在 Apple 中查看 API Reference
objective C
AppDelegate.h 有这些行：
第一步
//Add Framework in your project "UserNotifications"
#import <UserNotifications/UserNotifications.h>
@interface AppDelegate : UIResponder <UIApplicationDelegate,UNUserNotificationCenterDelegate>
第 2 步
AppDelegate.m
// define macro
#define SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedAscending)
#define SYSTEM_VERSION_LESS_THAN(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedAscending)
第三步
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
application.applicationIconBadgeNumber = 0;
if( SYSTEM_VERSION_LESS_THAN( @"10.0" ) ) {
[[UIApplication sharedApplication] registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge | UIUserNotificationTypeprovidesAppNotificationSettings) categories:nil]];
[[UIApplication sharedApplication] registerForRemoteNotifications];
//if( option != nil )
//{
// NSLog( @"registerForPushWithOptions:" );
//}
} else {
UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];
center.delegate = self;
[center requestAuthorizationWithOptions:(UNAuthorizationOptionSound | UNAuthorizationOptionAlert | UNAuthorizationOptionBadge) completionHandler:^(BOOL granted, NSError * _Nullable error) {
if( !error ) {
// required to get the app to do anything at all about push notifications
[[UIApplication sharedApplication] registerForRemoteNotifications];
NSLog( @"Push registration success." );
} else {
NSLog( @"Push registration FAILED" );
NSLog( @"ERROR: %@ - %@", error.localizedFailureReason, error.localizedDescription );
NSLog( @"SUGGESTIONS: %@ - %@", error.localizedRecoveryOptions, error.localizedRecoverySuggestion );
}
}];
}
return YES;
}
This will fire as a result of calling registerForRemoteNotifications:
- (void)application:(UIApplication*)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken
{
// custom stuff we do to register the device with our AWS middleman
}
Then, when a user taps a notification, this fires:
This will fire in iOS 10 when the app is foreground or background, but not closed
-(void) application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void
(^)(UIBackgroundFetchResult))completionHandler
{
// iOS 10 will handle notifications through other methods
if( SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO( @"10.0" ) )
{
NSLog( @"iOS version >= 10. Let NotificationCenter handle this one." );
// set a member variable to tell the new delegate that this is background
return;
}
NSLog( @"HANDLE PUSH, didReceiveRemoteNotification: %@", userInfo );
// custom code to handle notification content
if( [UIApplication sharedApplication].applicationState == UIApplicationStateInactive )
{
NSLog( @"INACTIVE" );
completionHandler( UIBackgroundFetchResultNewData );
}
else if( [UIApplication sharedApplication].applicationState == UIApplicationStateBackground )
{
NSLog( @"BACKGROUND" );
completionHandler( UIBackgroundFetchResultNewData );
}
else
{
NSLog( @"FOREGROUND" );
completionHandler( UIBackgroundFetchResultNewData );
}
}
或使用
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
{
[self application:application didReceiveRemoteNotification:userInfo fetchCompletionHandler:^(UIBackgroundFetchResult result) {
}];
}
Then for iOS 10, these two methods:
- (void)userNotificationCenter:(UNUserNotificationCenter *)center
willPresentNotification:(UNNotification *)notification
withCompletionHandler:(void (^)(UNNotificationPresentationOptions options))completionHandler
{
NSLog( @"Handle push from foreground" );
// custom code to handle push while app is in the foreground
NSLog(@"%@", notification.request.content.userInfo);
}
- (void)userNotificationCenter:(UNUserNotificationCenter *)center
didReceiveNotificationResponse:(UNNotificationResponse *)response
withCompletionHandler:(void (^)())completionHandler
{
NSLog( @"Handle push from background or closed" );
// if you set a member variable in didReceiveRemoteNotification, you will know if this is from closed or background
NSLog(@"%@", response.notification.request.content.userInfo);
}
- (void)userNotificationCenter:(UNUserNotificationCenter *)center
openSettingsForNotification:(UNNotification *)notification{
Open notification settings screen in app
}
我遇到了同样的问题。出现通知横幅，但未调用 -application:didReceiveRemoteNotification:fetchCompletionHandler: 方法。对我有用的解决方案是添加 - application:didReceiveRemoteNotification: 方法的实现并将调用转发给 -application:didReceiveRemoteNotification:fetchCompletionHandler::
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo {
[self application:application didReceiveRemoteNotification:userInfo fetchCompletionHandler:^(UIBackgroundFetchResult result){}];
}
Swift代码:
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
// Override point for customization after application launch.
if #available(iOS 10.0, *) {
let center = UNUserNotificationCenter.currentNotificationCenter()
center.delegate = self
}
// ...
return true
}
@available(iOS 10.0, *)
public func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
print(response.notification.request.content.userInfo)
}
@available(iOS 10.0, *)
public func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
print(notification.request.content.userInfo)
}
这是一个 iOS 错误。它将在 iOS 10.1 中修复。但只需等待 10 月发布 10.1，而不是实施新库并稍后将其删除。
顺便说一句，这个问题似乎已在 iOS 10.1 中修复。我在 10.1 上测试了我的应用程序，一切正常
工作版本 iOS11，Swift4，Xcode9。只需将以下代码复制粘贴到 AppDelegate 中。
import UIKit
import UserNotifications
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate,UNUserNotificationCenterDelegate {
var window: UIWindow?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
if #available(iOS 10, *)
{ // iOS 10 support
//create the notificationCenter
let center = UNUserNotificationCenter.current()
center.delegate = self
// set the type as sound or badge
center.requestAuthorization(options: [.sound,.alert,.badge]) { (granted, error) in
if granted {
print("Notification Enable Successfully")
}else{
print("Some Error Occure")
}
}
application.registerForRemoteNotifications()
}
else if #available(iOS 9, *)
{
// iOS 9 support
UIApplication.shared.registerUserNotificationSettings(UIUserNotificationSettings(types: [.badge, .sound, .alert], categories: nil))
UIApplication.shared.registerForRemoteNotifications()
}
else if #available(iOS 8, *)
{
// iOS 8 support
UIApplication.shared.registerUserNotificationSettings(UIUserNotificationSettings(types: [.badge, .sound,
.alert], categories: nil))
UIApplication.shared.registerForRemoteNotifications()
}
else
{ // iOS 7 support
application.registerForRemoteNotifications(matching: [.badge, .sound, .alert])
}
return true
}
//get device token here
func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken
deviceToken: Data)
{
let tokenParts = deviceToken.map { data in String(format: "%02.2hhx", data) }
let token = tokenParts.joined()
print("Registration succeeded!")
print("Token: ", token)
//send tokens to backend server
}
//get error here
func application(_ application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error:
Error) {
print("Registration failed!")
}
//get Notification Here below ios 10
func application(_ application: UIApplication, didReceiveRemoteNotification data: [AnyHashable : Any]) {
// Print notification payload data
print("Push notification received: \(data)")
}
//This is the two delegate method to get the notification in iOS 10..
//First for foreground
@available(iOS 10.0, *)
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (_ options:UNNotificationPresentationOptions) -> Void)
{
print("Handle push from foreground")
// custom code to handle push while app is in the foreground
print("\(notification.request.content.userInfo)")
}
//Second for background and close
@available(iOS 10.0, *)
func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response:UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void)
{
print("Handle push from background or closed")
// if you set a member variable in didReceiveRemoteNotification, you will know if this is from closed or background
print("\(response.notification.request.content.userInfo)")
}
}
swift 4,如果你使用的是ios11或者xcode版本大于9.0 那么你必须使用 UNUserNotification delegate 方法来调用 didReceiveRemoteNotification
func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
//Your code to handle events
}
Swift 4 和 IOS 12.
虽然可能有多种原因（已在其他答案中提到）为什么会发生此问题，但就我个人而言，解决方案与发送推送通知时的有效负载有关：
您需要将 json 负载上的 “内容可用” 键设置为 1。
例如：
{"aps":{"alert":"Test", "content-available":1, "badge":1,"sound":"default"}}
我认为这是设计使然，我目前正在研究 iOS 14，同样的情况也发生了。我意识到，如果您启用 'Background Fetching' 功能并实现 [didReceiveRemoteNotification: withCompletionHandler:] «您可能也想使用 [performBackgroundFetch:] 这样做»，那么您可以在该委托方法中设置一个断点并调试远程通知
在 iOS 9.3 中，didReceiveRemoteNotification 方法会在以下两种情况下被调用。
1) 收到推送通知时 2) 当用户通过点击通知启动应用程序时。
但是在 iOS 10，我注意到 didReceiveRemoteNotification 方法在用户通过点击通知启动应用程序时 NOT 触发。只有在收到通知时才会调用它。因此，应用程序从通知启动后，我无法执行任何进一步的操作。
解决这个问题的方法是什么？有什么想法吗？
类型转换
对于 Swift3
-
示例参见 this
import the
UserNotificationsframework and add theUNUserNotificationCenterDelegatein Appdelegate
import UserNotifications
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate,UNUserNotificationCenterDelegate
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
//create the notificationCenter
let center = UNUserNotificationCenter.current()
center.delegate = self
// set the type as sound or badge
center.requestAuthorization(options: [.sound,.alert,.badge, .providesAppNotificationSettings]) { (granted, error) in
// Enable or disable features based on authorization
}
application.registerForRemoteNotifications()
return true
}
func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
// let chars = UnsafePointer<CChar>((deviceToken as NSData).bytes)
var token = ""
for i in 0..<deviceToken.count {
//token += String(format: "%02.2hhx", arguments: [chars[i]])
token = token + String(format: "%02.2hhx", arguments: [deviceToken[i]])
}
print("Registration succeeded!")
print("Token: ", token)
}
func application(_ application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: NSError) {
print("Registration failed!")
}
receive the Notifications using this delegates
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (_ options: UNNotificationPresentationOptions) -> Void) {
print("Handle push from foreground")
// custom code to handle push while app is in the foreground
print("\(notification.request.content.userInfo)")
}
func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
print("Handle push from background or closed")
// if you set a member variable in didReceiveRemoteNotification, you will know if this is from closed or background
print("\(response.notification.request.content.userInfo)")
}
func userNotificationCenter(_ center: UNUserNotificationCenter, openSettingsFor notification: UNNotification?) {
let navController = self.window?.rootViewController as! UINavigationController
let notificationSettingsVC = NotificationSettingsViewController()
navController.pushViewController(notificationSettingsVC, animated: true)
}
有关更多信息，您可以在 Apple 中查看 API Reference
objective C
AppDelegate.h 有这些行：
第一步
//Add Framework in your project "UserNotifications"
#import <UserNotifications/UserNotifications.h>
@interface AppDelegate : UIResponder <UIApplicationDelegate,UNUserNotificationCenterDelegate>
第 2 步
AppDelegate.m
// define macro
#define SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedAscending)
#define SYSTEM_VERSION_LESS_THAN(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedAscending)
第三步
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
application.applicationIconBadgeNumber = 0;
if( SYSTEM_VERSION_LESS_THAN( @"10.0" ) ) {
[[UIApplication sharedApplication] registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge | UIUserNotificationTypeprovidesAppNotificationSettings) categories:nil]];
[[UIApplication sharedApplication] registerForRemoteNotifications];
//if( option != nil )
//{
// NSLog( @"registerForPushWithOptions:" );
//}
} else {
UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];
center.delegate = self;
[center requestAuthorizationWithOptions:(UNAuthorizationOptionSound | UNAuthorizationOptionAlert | UNAuthorizationOptionBadge) completionHandler:^(BOOL granted, NSError * _Nullable error) {
if( !error ) {
// required to get the app to do anything at all about push notifications
[[UIApplication sharedApplication] registerForRemoteNotifications];
NSLog( @"Push registration success." );
} else {
NSLog( @"Push registration FAILED" );
NSLog( @"ERROR: %@ - %@", error.localizedFailureReason, error.localizedDescription );
NSLog( @"SUGGESTIONS: %@ - %@", error.localizedRecoveryOptions, error.localizedRecoverySuggestion );
}
}];
}
return YES;
}
This will fire as a result of calling registerForRemoteNotifications:
- (void)application:(UIApplication*)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken
{
// custom stuff we do to register the device with our AWS middleman
}
Then, when a user taps a notification, this fires:
This will fire in iOS 10 when the app is foreground or background, but not closed
-(void) application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void
(^)(UIBackgroundFetchResult))completionHandler
{
// iOS 10 will handle notifications through other methods
if( SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO( @"10.0" ) )
{
NSLog( @"iOS version >= 10. Let NotificationCenter handle this one." );
// set a member variable to tell the new delegate that this is background
return;
}
NSLog( @"HANDLE PUSH, didReceiveRemoteNotification: %@", userInfo );
// custom code to handle notification content
if( [UIApplication sharedApplication].applicationState == UIApplicationStateInactive )
{
NSLog( @"INACTIVE" );
completionHandler( UIBackgroundFetchResultNewData );
}
else if( [UIApplication sharedApplication].applicationState == UIApplicationStateBackground )
{
NSLog( @"BACKGROUND" );
completionHandler( UIBackgroundFetchResultNewData );
}
else
{
NSLog( @"FOREGROUND" );
completionHandler( UIBackgroundFetchResultNewData );
}
}
或使用
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
{
[self application:application didReceiveRemoteNotification:userInfo fetchCompletionHandler:^(UIBackgroundFetchResult result) {
}];
}
Then for iOS 10, these two methods:
- (void)userNotificationCenter:(UNUserNotificationCenter *)center
willPresentNotification:(UNNotification *)notification
withCompletionHandler:(void (^)(UNNotificationPresentationOptions options))completionHandler
{
NSLog( @"Handle push from foreground" );
// custom code to handle push while app is in the foreground
NSLog(@"%@", notification.request.content.userInfo);
}
- (void)userNotificationCenter:(UNUserNotificationCenter *)center
didReceiveNotificationResponse:(UNNotificationResponse *)response
withCompletionHandler:(void (^)())completionHandler
{
NSLog( @"Handle push from background or closed" );
// if you set a member variable in didReceiveRemoteNotification, you will know if this is from closed or background
NSLog(@"%@", response.notification.request.content.userInfo);
}
- (void)userNotificationCenter:(UNUserNotificationCenter *)center
openSettingsForNotification:(UNNotification *)notification{
Open notification settings screen in app
}
我遇到了同样的问题。出现通知横幅，但未调用 -application:didReceiveRemoteNotification:fetchCompletionHandler: 方法。对我有用的解决方案是添加 - application:didReceiveRemoteNotification: 方法的实现并将调用转发给 -application:didReceiveRemoteNotification:fetchCompletionHandler::
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo {
[self application:application didReceiveRemoteNotification:userInfo fetchCompletionHandler:^(UIBackgroundFetchResult result){}];
}
Swift代码:
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
// Override point for customization after application launch.
if #available(iOS 10.0, *) {
let center = UNUserNotificationCenter.currentNotificationCenter()
center.delegate = self
}
// ...
return true
}
@available(iOS 10.0, *)
public func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
print(response.notification.request.content.userInfo)
}
@available(iOS 10.0, *)
public func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
print(notification.request.content.userInfo)
}
这是一个 iOS 错误。它将在 iOS 10.1 中修复。但只需等待 10 月发布 10.1，而不是实施新库并稍后将其删除。
顺便说一句，这个问题似乎已在 iOS 10.1 中修复。我在 10.1 上测试了我的应用程序，一切正常
工作版本 iOS11，Swift4，Xcode9。只需将以下代码复制粘贴到 AppDelegate 中。
import UIKit
import UserNotifications
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate,UNUserNotificationCenterDelegate {
var window: UIWindow?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
if #available(iOS 10, *)
{ // iOS 10 support
//create the notificationCenter
let center = UNUserNotificationCenter.current()
center.delegate = self
// set the type as sound or badge
center.requestAuthorization(options: [.sound,.alert,.badge]) { (granted, error) in
if granted {
print("Notification Enable Successfully")
}else{
print("Some Error Occure")
}
}
application.registerForRemoteNotifications()
}
else if #available(iOS 9, *)
{
// iOS 9 support
UIApplication.shared.registerUserNotificationSettings(UIUserNotificationSettings(types: [.badge, .sound, .alert], categories: nil))
UIApplication.shared.registerForRemoteNotifications()
}
else if #available(iOS 8, *)
{
// iOS 8 support
UIApplication.shared.registerUserNotificationSettings(UIUserNotificationSettings(types: [.badge, .sound,
.alert], categories: nil))
UIApplication.shared.registerForRemoteNotifications()
}
else
{ // iOS 7 support
application.registerForRemoteNotifications(matching: [.badge, .sound, .alert])
}
return true
}
//get device token here
func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken
deviceToken: Data)
{
let tokenParts = deviceToken.map { data in String(format: "%02.2hhx", data) }
let token = tokenParts.joined()
print("Registration succeeded!")
print("Token: ", token)
//send tokens to backend server
}
//get error here
func application(_ application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error:
Error) {
print("Registration failed!")
}
//get Notification Here below ios 10
func application(_ application: UIApplication, didReceiveRemoteNotification data: [AnyHashable : Any]) {
// Print notification payload data
print("Push notification received: \(data)")
}
//This is the two delegate method to get the notification in iOS 10..
//First for foreground
@available(iOS 10.0, *)
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (_ options:UNNotificationPresentationOptions) -> Void)
{
print("Handle push from foreground")
// custom code to handle push while app is in the foreground
print("\(notification.request.content.userInfo)")
}
//Second for background and close
@available(iOS 10.0, *)
func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response:UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void)
{
print("Handle push from background or closed")
// if you set a member variable in didReceiveRemoteNotification, you will know if this is from closed or background
print("\(response.notification.request.content.userInfo)")
}
}
swift 4,如果你使用的是ios11或者xcode版本大于9.0 那么你必须使用 UNUserNotification delegate 方法来调用 didReceiveRemoteNotification
func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
//Your code to handle events
}
Swift 4 和 IOS 12.
虽然可能有多种原因（已在其他答案中提到）为什么会发生此问题，但就我个人而言，解决方案与发送推送通知时的有效负载有关：
您需要将 json 负载上的 “内容可用” 键设置为 1。
例如：
{"aps":{"alert":"Test", "content-available":1, "badge":1,"sound":"default"}}
我认为这是设计使然，我目前正在研究 iOS 14，同样的情况也发生了。我意识到，如果您启用 'Background Fetching' 功能并实现 [didReceiveRemoteNotification: withCompletionHandler:] «您可能也想使用 [performBackgroundFetch:] 这样做»，那么您可以在该委托方法中设置一个断点并调试远程通知