应用程序在后台时如何处理 iOS 远程通知

我正在通过苹果推送通知开发iOS推送通知功能，现在当我的应用程序处于后台或前台时我收到了正确的通知，但我想当我的应用程序处于后台时基本上当我的应用程序处于后台时处理远程通知只是显示来自有效负载的警报消息。实际上我只是想自定义我的远程通知。

code:

 - (BOOL)application:(UIApplication )application didFinishLaunchingWithOptions:(NSDictionary )launchOptions {
// Override point for customization after application launch.
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0)
{
//        [[UIApplication sharedApplication] registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge) categories:nil]];
[[UIApplication sharedApplication] registerForRemoteNotifications];
}
else
{
[[UIApplication sharedApplication] registerForRemoteNotificationTypes:
(UIUserNotificationTypeBadge | UIUserNotificationTypeSound | UIUserNotificationTypeAlert)];
}
return YES;
}
- (void)application:(UIApplication *)application
didFailToRegisterForRemoteNotificationsWithError:(NSError *)error
{
NSLog(@"Did Register for Remote Notifications with Device Token (%@)", error);
}
- (void)application:(UIApplication )application didRegisterForRemoteNotificationsWithDeviceToken:(NSData )deviceToken {
NSLog(@"Did Register for Remote Notifications with Device Token (%@)", deviceToken);
}
-(void)application:(UIApplication )application didReceiveRemoteNotification:(NSDictionary )userInfo fetchCompletionHandler:(void (UIBackgroundFetchResult))completionHandler
{
NSDictionary * aps=[userInfo valueForKey"aps"];
NSLog(@"did recevie %@",aps);
NSLog(@"userinfo details %@",[aps valueForKey"alert"]);
}

在 iOS 10 中首先你必须设置UNUserNotificationCenterDelegate in AppDelegate.h file

@interface AppDelegate : UIResponder <UIApplicationDelegate,CLLocationManagerDelegate,UNUserNotificationCenterDelegate>

之后在AppDelegate.m像这样写代码

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.1) {
            // iOS 7.1 or earlier. Disable the deprecation warnings.
            UIRemoteNotificationType allNotificationTypes =
            (UIRemoteNotificationTypeSound |
             UIRemoteNotificationTypeAlert |
             UIRemoteNotificationTypeBadge);
            [application registerForRemoteNotificationTypes:allNotificationTypes];
            [[UIApplication sharedApplication] registerForRemoteNotifications];
        } else {
            // iOS 8 or later
            // [START register_for_notifications]
    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 9.0)
    {
                UIUserNotificationType allNotificationTypes =
                (UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge);
                UIUserNotificationSettings *settings =
                [UIUserNotificationSettings settingsForTypes:allNotificationTypes categories:nil];
                [application registerForRemoteNotificationTypes:(UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound)];
                [[UIApplication sharedApplication] registerUserNotificationSettings:settings];
                [[UIApplication sharedApplication] registerForRemoteNotifications];
                [application registerForRemoteNotifications];
            } else {
                // iOS 10 or later
    #if defined(__IPHONE_10_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0
                UNAuthorizationOptions authOptions =
                UNAuthorizationOptionAlert
                | UNAuthorizationOptionSound
                | UNAuthorizationOptionBadge;
                [[UNUserNotificationCenter currentNotificationCenter]
                 requestAuthorizationWithOptions:authOptions
                 completionHandler:^(BOOL granted, NSError * _Nullable error) {
                 }
                 ];
                // For iOS 10 display notification (sent via APNS)
                [[UNUserNotificationCenter currentNotificationCenter] setDelegate:self];            
    [[UIApplication sharedApplication] registerForRemoteNotifications];
         return YES;
}

现在iOS10以下版本实现此方法

    - (void)application:(UIApplication *)application
    didReceiveRemoteNotification:(NSDictionary *)userInfo
    fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))handler {
        NSLog(@"Notification received: %@", userInfo);
        if( SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO( @"10.0" ) )
        {
            NSLog( @"iOS version >= 10. Let NotificationCenter handle this one." );
            return;
        }
        NSLog( @"HANDLE PUSH, didReceiveRemoteNotification: %@", userInfo );
          else{
            handler( UIBackgroundFetchResultNewData );
}

    }

苹果在iOS10中引入了这两种方法来接收推送通知。

也写这些方法

    // Receive displayed notifications for iOS 10 devices.
    #if defined(__IPHONE_10_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0
    - (void)userNotificationCenter:(UNUserNotificationCenter *)center
           willPresentNotification:(UNNotification *)notification
             withCompletionHandler:(void (^)(UNNotificationPresentationOptions))completionHandler {

        NSDictionary *userInfo = notification.request.content.userInfo;

        NSLog(@"%@", userInfo);

            completionHandler( UNNotificationPresentationOptionAlert );
   }

-(void)userNotificationCenter:(UNUserNotificationCenter *)center didReceiveNotificationResponse:(UNNotificationResponse *)response withCompletionHandler:(void(^)())completionHandler{

    NSLog(@"Userinfo %@",response.notification.request.content.userInfo);
//    completionHandler(UNNotificationPresentationOptionAlert);
       }

就是这样。

Try this