entityMap|0|type|IMAGE|mutability|IMMUTABLE|data|imageUrl|https://ask.qcloudimg.com/http-save/actteam/b8650aadc1c848aeed4d0b0bf43341a6.png|imageAlt|1|https://ask.qcloudimg.com/http-save/actteam/8ca38f48eef0a57e5a50708e52ce3c00.png|2|LINK|MUTABLE|url|https://swifting.io/blog/2016/08/22/23-notifications-in-ios-10/|3|https://developer.apple.com/reference/usernotifications/unusernotificationcenter|blocks|key|15t59|text|类型转换|unstyled|depth|inlineStyleRanges|entityRanges|emjod|?|atomic|offset|length|almt7|对于Swift3|71nri|aehb4|-|78igu|有关示例，请参阅this|7f2vm|导入UserNotifications框架，并添加UNUserNotificationCenterDelegate在Appdelegate中|style|CODE|23nl6|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((deviceToken+as+NSData).bytes)
++var+token+=+""

++for+i+in+0..|code-block|syntax|javascript|asurk|receive+the+Notifications+using+this+delegates|eqsqv|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)
}|8t9v4|for+more+Information+you+can+see+in+Apple+APIReference|6essj|objective+C|eq5u8|AppDelegate.h+has+these+lines:|5hs8t|Step-1|dc55t|//Add+Framework+in+your+project+"UserNotifications"
#import+++
@interface+AppDelegate+:+UIResponder|bu2nu|Step-2|4pgh7|AppDelegate.m|79ihi|//+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)|3srv1|Step-3|2ncii|-+(BOOL)application:(UIApplication+*)application+didFinishLaunchingWithOptions:(NSDictionary+*)launchOptions+{
application.applicationIconBadgeNumber+=+0;
++++if(+SYSTEM_VERSION_LESS_THAN(+@"10.0"+)+)+{++
++++++++[[UIApplication+sharedApplication]+registerUserNotificationSettings:[UIUserNotificationSettings+settingsForTypes:(UIUserNotificationTypeSound+%7C++++UIUserNotificationTypeAlert+%7C+UIUserNotificationTypeBadge+%7C++UIUserNotificationTypeprovidesAppNotificationSettings)+categories:nil]];++
++++++++[[UIApplication+sharedApplication]+registerForRemoteNotifications];++

++++++++//if(+option+!=+nil+)++
++++++++//{++
++++++++//++++NSLog(+@"registerForPushWithOptions:"+);++
++++++++//}++
++++}+else+{++
++++++UNUserNotificationCenter+*center+=+[UNUserNotificationCenter+currentNotificationCenter];++
++++++center.delegate+=+self;++
++++++[center+requestAuthorizationWithOptions:(UNAuthorizationOptionSound+%7C+UNAuthorizationOptionAlert+%7C+UNAuthorizationOptionBadge)+completionHandler:%5E(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:+%25@+-+%25@",+error.localizedFailureReason,+error.localizedDescription+);++
++++++++++++NSLog(+@"SUGGESTIONS:+%25@+-+%25@",+error.localizedRecoveryOptions,+error.localizedRecoverySuggestion+);++
++++++++}
++++++++}];
++++}

++++return+YES;
}|1inar|This+will+fire+as+a+result+of+calling+registerForRemoteNotifications:|9ntr|-+(void)application:(UIApplication*)application+didRegisterForRemoteNotificationsWithDeviceToken:(NSData+*)deviceToken++
{++
//+custom+stuff+we+do+to+register+the+device+with+our+AWS+middleman++
+}|6qqoq|Then,+when+a+user+taps+a+notification,+this+fires:|5rnnc|This+will+fire+in+iOS+10+when+the+app+is+foreground+or+background,+but+not+closed|2r98s|-(void)+application:(UIApplication+*)application+didReceiveRemoteNotification:(NSDictionary+*)userInfo+fetchCompletionHandler:(void++
++(%5E)(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:+%25@",+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+);++
}++
}|4fl8|or+use|bgmng|-+(void)application:(UIApplication+*)application+didReceiveRemoteNotification:(NSDictionary+*)userInfo++
{++
[self+application:application+didReceiveRemoteNotification:userInfo+fetchCompletionHandler:%5E(UIBackgroundFetchResult+result)+{++
}];++
}|7a67h|Then+for+iOS+10,+these+two+methods:|9e08g|-+(void)userNotificationCenter:(UNUserNotificationCenter+*)center++
++++willPresentNotification:(UNNotification+*)notification++
++withCompletionHandler:(void+(%5E)(UNNotificationPresentationOptions+options))completionHandler++
++++{++
++NSLog(+@"Handle+push+from+foreground"+);++
++//+custom+code+to+handle+push+while+app+is+in+the+foreground++
++++NSLog(@"%25@",+notification.request.content.userInfo);
+++}++

-+(void)userNotificationCenter:(UNUserNotificationCenter+*)center++
didReceiveNotificationResponse:(UNNotificationResponse+*)response++
++withCompletionHandler:(void+(%5E)())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(@"%25@",+response.notification.request.content.userInfo);
++++}++

++++-+(void)userNotificationCenter:(UNUserNotificationCenter+*)center+
+++openSettingsForNotification:(UNNotification+*)notification{
++++++++Open+notification+settings+screen+in+app
+++}^0|0|0|1|0|0|0|0|1|1|0|0|8|4|2|0|2|H|P|W|0|0|0|1A|0|0|0|1I|19|9|3|0|0|B|0|0|U|0|0|6|0|0|0|6|0|0|D|0|0|0|6|0|0|0|1X|0|0|0|1E|0|0|29|0|0|0|6|0|0|0|Z|0^^$0|$1|$2|3|4|5|6|$7|8|9|-4]]|A|$2|3|4|5|6|$7|B|9|-4]]|C|$2|D|4|E|6|$F|G]]|H|$2|D|4|E|6|$F|I]]]|J|@$K|L|M|N|2|O|P|2J|Q|@]|R|@]|6|$]]|$K|S|M|T|2|U|P|2K|Q|@]|R|@$V|2L|W|2M|K|2N]]|6|$]]|$K|X|M|Y|2|O|P|2O|Q|@]|R|@]|6|$]]|$K|Z|M|T|2|U|P|2P|Q|@]|R|@$V|2Q|W|2R|K|2S]]|6|$]]|$K|10|M|11|2|O|P|2T|Q|@]|R|@]|6|$]]|$K|12|M|13|2|O|P|2U|Q|@]|R|@$V|2V|W|2W|K|2X]]|6|$]]|$K|14|M|15|2|O|P|2Y|Q|@$V|2Z|W|30|16|17]|$V|31|W|32|16|17]]|R|@]|6|$]]|$K|18|M|19|2|1A|P|33|Q|@]|R|@]|6|$1B|1C]]|$K|1D|M|1E|2|O|P|34|Q|@$V|35|W|36|16|17]]|R|@]|6|$]]|$K|1F|M|1G|2|1A|P|37|Q|@]|R|@]|6|$1B|1C]]|$K|1H|M|1I|2|O|P|38|Q|@$V|39|W|3A|16|17]]|R|@$V|3B|W|3C|K|3D]]|6|$]]|$K|1J|M|1K|2|O|P|3E|Q|@$V|3F|W|3G|16|17]]|R|@]|6|$]]|$K|1L|M|1M|2|O|P|3H|Q|@$V|3I|W|3J|16|17]]|R|@]|6|$]]|$K|1N|M|1O|2|O|P|3K|Q|@$V|3L|W|3M|16|17]]|R|@]|6|$]]|$K|1P|M|1Q|2|1A|P|3N|Q|@]|R|@]|6|$1B|1C]]|$K|1R|M|1S|2|O|P|3O|Q|@$V|3P|W|3Q|16|17]]|R|@]|6|$]]|$K|1T|M|1U|2|O|P|3R|Q|@$V|3S|W|3T|16|17]]|R|@]|6|$]]|$K|1V|M|1W|2|1A|P|3U|Q|@]|R|@]|6|$1B|1C]]|$K|1X|M|1Y|2|O|P|3V|Q|@$V|3W|W|3X|16|17]]|R|@]|6|$]]|$K|1Z|M|20|2|1A|P|3Y|Q|@]|R|@]|6|$1B|1C]]|$K|21|M|22|2|O|P|3Z|Q|@$V|40|W|41|16|17]]|R|@]|6|$]]|$K|23|M|24|2|1A|P|42|Q|@]|R|@]|6|$1B|1C]]|$K|25|M|26|2|O|P|43|Q|@$V|44|W|45|16|17]]|R|@]|6|$]]|$K|27|M|28|2|O|P|46|Q|@$V|47|W|48|16|17]]|R|@]|6|$]]|$K|29|M|2A|2|1A|P|49|Q|@]|R|@]|6|$1B|1C]]|$K|2B|M|2C|2|O|P|4A|Q|@$V|4B|W|4C|16|17]]|R|@]|6|$]]|$K|2D|M|2E|2|1A|P|4D|Q|@]|R|@]|6|$1B|1C]]|$K|2F|M|2G|2|O|P|4E|Q|@$V|4F|W|4G|16|17]]|R|@]|6|$]]|$K|2H|M|2I|2|1A|P|4H|Q|@]|R|@]|6|$1B|1C]]]]

type converson

<a href="https://i.stack.imgur.com/kYc9G.png" rel="noreferrer"><img src="https://i.stack.imgur.com/3pKlb.png" alt="enter image description here"></a>

for Swift3

<a href="https://i.stack.imgur.com/kYc9G.png" rel="noreferrer"><img src="https://i.stack.imgur.com/kYc9G.png" alt="enter image description here"></a>

-

for sample see <a href="https://swifting.io/blog/2016/08/22/23-notifications-in-ios-10/" rel="noreferrer">this</a>

<blockquote>
 import the <code>UserNotifications</code> framework and add the <code>UNUserNotificationCenterDelegate</code> in Appdelegate
</blockquote>

<pre><code>import UserNotifications

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate,UNUserNotificationCenterDelegate 


func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -&gt; 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&lt;CChar&gt;((deviceToken as NSData).bytes)
 var token = ""

 for i in 0..&lt;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!")
 }
</code></pre>

<blockquote>
 receive the Notifications using this delegates
</blockquote>

<pre><code> func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (_ options: UNNotificationPresentationOptions) -&gt; 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 () -&gt; 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)
}
</code></pre>

for more Information you can see in Apple API <a href="https://developer.apple.com/reference/usernotifications/unusernotificationcenter" rel="noreferrer">Reference</a>

<hr>

<h2>objective C</h2>

AppDelegate.h has these lines:

Step-1

<pre><code>//Add Framework in your project "UserNotifications"
#import &lt;UserNotifications/UserNotifications.h&gt; 
@interface AppDelegate : UIResponder &lt;UIApplicationDelegate,UNUserNotificationCenterDelegate&gt; 
</code></pre>

Step-2

AppDelegate.m

<pre><code> // 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) 
</code></pre>

Step-3

<pre><code>- (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;
}
</code></pre>

<blockquote>
 This will fire as a result of calling registerForRemoteNotifications:
</blockquote>

<pre><code> - (void)application:(UIApplication*)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken 
{ 
// custom stuff we do to register the device with our AWS middleman 
 }
</code></pre>

<blockquote>
 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 
</blockquote>

<pre><code> -(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 &gt;= 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 ); 
} 
} 
</code></pre>

or use 

<pre><code> - (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo 
{ 
[self application:application didReceiveRemoteNotification:userInfo fetchCompletionHandler:^(UIBackgroundFetchResult result) { 
}]; 
} 
</code></pre>

<blockquote>
 Then for iOS 10, these two methods:
</blockquote>

<pre><code>- (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
 }
</code></pre>

entityMap|0|type|LINK|mutability|MUTABLE|data|url|https://forums.developer.apple.com/thread/54332|blocks|key|fenn9|text|我也有同样的问题。出现通知横幅，但是|unstyled|depth|inlineStyleRanges|entityRanges|cor9j|-application:didReceiveRemoteNotification:fetchCompletionHandler:未调用方法。对我来说有效的解决方案是添加-+application:didReceiveRemoteNotification:方法并将调用前转到-application:didReceiveRemoteNotification:fetchCompletionHandler:|offset|length|style|CODE|7h1t8|-+(void)application:(UIApplication+*)application+didReceiveRemoteNotification:(NSDictionary+*)userInfo+{
++++[self+application:application+didReceiveRemoteNotification:userInfo+fetchCompletionHandler:%5E(UIBackgroundFetchResult+result){}];
}|code-block|syntax|javascript|8krl6|Source..。^0|0|0|1T|2D|17|3T|1T|0|0|0|6|0^^$0|$1|$2|3|4|5|6|$7|8]]]|9|@$A|B|C|D|2|E|F|V|G|@]|H|@]|6|$]]|$A|I|C|J|2|E|F|W|G|@$K|X|L|Y|M|N]|$K|Z|L|10|M|N]|$K|11|L|12|M|N]]|H|@]|6|$]]|$A|O|C|P|2|Q|F|13|G|@]|H|@]|6|$R|S]]|$A|T|C|U|2|E|F|14|G|@]|H|@$K|15|L|16|A|17]]|6|$]]]]

I had the same problem. Notification banner appeared, but <code>-application:didReceiveRemoteNotification:fetchCompletionHandler:</code> method was not called. The solution for me that worked was to add implementation of <code>- application:didReceiveRemoteNotification:</code> method and forward call to <code>-application:didReceiveRemoteNotification:fetchCompletionHandler:</code>:

<pre><code>- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo {
 [self application:application didReceiveRemoteNotification:userInfo fetchCompletionHandler:^(UIBackgroundFetchResult result){}];
}
</code></pre>

<a href="https://forums.developer.apple.com/thread/54332">Source</a>.

entityMap|blocks|key|9b8b|text|Swift代码|type|unstyled|depth|inlineStyleRanges|entityRanges|data|n389|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)
}|code-block|syntax|javascript^0|0^^$0|$]|1|@$2|3|4|5|6|7|8|H|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|I|9|@]|A|@]|B|$F|G]]]]

Swift code:

<pre><code>func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -&gt; 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 () -&gt; Void) { 
 print(response.notification.request.content.userInfo) 
}

@available(iOS 10.0, *)
public func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -&gt; Void) {
 print(notification.request.content.userInfo)
}
</code></pre>

entityMap|0|type|LINK|mutability|MUTABLE|data|url|https://forums.developer.apple.com/thread/54322|blocks|key|3gh50|text|这是一个iOS错误。它将在iOS+10.1中修复。但只需等待10.1版本在10月份发布，而不是实现一个新的库并在以后删除它。https://forums.developer.apple.com/thread/54322|unstyled|depth|inlineStyleRanges|entityRanges|offset|length^0|1Q|1B|0^^$0|$1|$2|3|4|5|6|$7|8]]]|9|@$A|B|C|D|2|E|F|K|G|@]|H|@$I|L|J|M|A|N]]|6|$]]]]

It is an iOS bug. It will be fixed in iOS 10.1. But just wait for 10.1 release in Oct instead of implementing a new library and remove it later.

<a href="https://forums.developer.apple.com/thread/54322" rel="nofollow noreferrer">https://forums.developer.apple.com/thread/54322</a>

entityMap|blocks|key|5hegs|text|顺便说一句，这个问题似乎在iOS+10.1中得到了解决。我在10.1上测试了我的应用程序，一切正常|type|unstyled|depth|inlineStyleRanges|entityRanges|data^0^^$0|$]|1|@$2|3|4|5|6|7|8|C|9|@]|A|@]|B|$]]]]

BTW, this issue seems to be fixed in iOS 10.1. I tested my app on 10.1, all work fine

entityMap|blocks|key|db95m|text|工作版本iOS+11、Swift+4、Xcode+9。只需将以下代码复制粘贴到AppDelegate中即可。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|26n2|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:+"%2502.2hhx",+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)")
++++}


}|code-block|syntax|javascript^0|0^^$0|$]|1|@$2|3|4|5|6|7|8|H|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|I|9|@]|A|@]|B|$F|G]]]]

Working version iOS 11, Swift 4, Xcode 9. Just copy paste the below code in AppDelegate. 

<pre><code>import UIKit
import UserNotifications
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate,UNUserNotificationCenterDelegate {

 var window: UIWindow?


 func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -&gt; 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) -&gt; 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 () -&gt; 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)")
 }


}
</code></pre>

entityMap|blocks|key|fl7f0|text|斯威夫特4如果您正在使用ios+11或xcode版本高于9.0那么你一定用过UNUserNotification委派方法调用didReceiveRemoteNotification|type|unstyled|depth|inlineStyleRanges|entityRanges|data|35qd3|func+userNotificationCenter(_+center:+UNUserNotificationCenter,+didReceive+response:+UNNotificationResponse,+withCompletionHandler+completionHandler:+@escaping+()+->+Void)+{

//Your+code+to+handle+events

}|code-block|syntax|javascript^0|0^^$0|$]|1|@$2|3|4|5|6|7|8|H|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|I|9|@]|A|@]|B|$F|G]]]]

swift 4, if you are using ios 11 or xcode version greater than 9.0 then you must have use UNUserNotification delegate method to call the didReceiveRemoteNotification

<pre><code> func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -&gt; Void) {

//Your code to handle events

}
</code></pre>

entityMap|blocks|key|4f0vm|text|Swift+4和IOS+12。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|biafu|虽然可能有多种原因(已经在其他答案中提到)可能会发生此问题，但在我个人的情况下，解决方案与发送推送通知时的有效负载有关：|bd0f8|您需要将“内容-可用”将json有效负载上的密钥设置为1。|4cpd0|例如：|7l13u|{"aps":{"alert":"Test",+"content-available":1,+"badge":1,"sound":"default"}}|code-block|syntax|js^0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|N|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|O|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|P|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|Q|9|@]|A|@]|B|$]]|$2|I|4|J|6|K|8|R|9|@]|A|@]|B|$L|M]]]]

Swift 4 and IOS 12.
While there might be multiple reasons (Already mentioned on other answers) why this issue could happen, in my personal case the solution was related to the payload when sending the push notification:
You need to set the &quot;content-available&quot; key on the json payload to 1.
e.g:
<pre><code>{&quot;aps&quot;:{&quot;alert&quot;:&quot;Test&quot;, &quot;content-available&quot;:1, &quot;badge&quot;:1,&quot;sound&quot;:&quot;default&quot;}}
</code></pre>

entityMap|blocks|key|a1lft|text|我认为这是被设计成这样的，我目前正在开发iOS+14，同样的事情也发生了。我意识到的是，如果您启用了“后台获取”功能并实现了didReceiveRemoteNotification:+withCompletionHandler：«您可能还希望使用以下命令来执行此操作performBackgroundFetch：然后，您可以在该委托方法中设置断点并调试远程通知|type|unstyled|depth|inlineStyleRanges|entityRanges|data^0^^$0|$]|1|@$2|3|4|5|6|7|8|C|9|@]|A|@]|B|$]]]]

I think this is done like this by design, I'm currently working on iOS 14 and the same happens. What I realized is that if you enable 'Background Fetching' capability and implement the [didReceiveRemoteNotification: withCompletionHandler:] «you may also want to do so with [performBackgroundFetch:] as well», then you can set a breakpoint in that delegate method and debug remote notification

In iOS 9.3, the <code>didReceiveRemoteNotification</code> method gets called on both of the following occasions. 

1) When the push notification is received 
2) When the user launches the app by tapping on the notification.

But on iOS 10, I notice that the <code>didReceiveRemoteNotification</code> method does NOT fire when the user launches the app by tapping on the notification. It's called only when the notification is received. Hence, I cannot do any further action after the app is launched from notification.

What should be the fix for this? Any idea?

didReceiveRemoteNotification not called, iOS 10

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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 在iOS 9.3中，didReceiveRemoteNotification方法在以下两种情况下都会被调用。 1)当接收到推送通知时2)当用户通过点击通知启动应用程序时。但是在iOS 10上，我注意到didReceiveRemoteNotification方法可以做到这一点。注释当用户通过点击通知启动应用程序时触发。...

问未调用didReceiveRemoteNotification，iOS 10
EN

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问未调用didReceiveRemoteNotification，iOS 10EN