如何在應用程序處於后台時處理 iOS 遠程通知

Question

我正在通過蘋果推送通知處理 iOS 推送通知功能，現在我在我的應用程序處於后台或前台時收到正確的通知，但我想在我的應用程序處於后台時處理遠程通知，基本上當我的應用程序處於后台時只是顯示來自有效負載的警報消息。實際上我只想自定義我的遠程通知。

代碼：

 - (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"]);
}

Answer 1

在 iOS 10 中，首先你必須在AppDelegate.h文件中設置UNUserNotificationCenterDelegate

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

之后在AppDelegate.m編寫這樣的代碼

- (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;
}

現在為iOS10以下版本實現此方法

    - (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 );
}

    }

蘋果在iOS10中引入了這兩種方式來接收推送通知。

也寫這些方法

    // 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);
       }

就是這樣。

嘗試這個