ios - 使用 firebase 和 Objective C 不接收推送通知

Question

我正在尝试使用 Firebase 进行推送通知。我已通过 Cocoapods 成功安装了 Firebase 和 Firebase 消息传递。

我使用了下面的代码

 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    [FIRApp configure];

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(tokenRefreshCallback:) name:kFIRInstanceIDTokenRefreshNotification object:nil];


    UIUserNotificationType allNotificationsType = (UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge);

    UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:allNotificationsType categories:nil];
    [application registerUserNotificationSettings:settings];

    [application isRegisteredForRemoteNotifications];

    return YES;
}


 -(void)applicationDidEnterBackground:(UIApplication *)application {

    [[FIRMessaging messaging] disconnect];
    NSLog(@"Disconnect from FCM");
}

- (void)applicationDidBecomeActive:(UIApplication *)application {
     [self connectToFirebase];
}

- (void) application:(UIApplication *) application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:( void (^)(UIBackgroundFetchResult))completionHandler{

    // Pring The Message Id
    NSLog(@"Mesage Id : %@",userInfo[@"gcm.message_id"]);

    // Print Full Message
    NSLog(@"%@",userInfo);
}

#pragma mark -- Custom Firebase code


- (void)tokenRefreshCallback:(NSNotification *) notification{
    NSString *refreshedToken = [[FIRInstanceID instanceID] token];
    NSLog(@"IstanceID token: %@", refreshedToken);

    // Connect To FCM since connection may have failed when attempt before having a token
    [self connectToFirebase];
}

-(void) connectToFirebase{

    [[FIRMessaging messaging] connectWithCompletion:^(NSError * _Nullable error)
     {
         if ( error != nil)
         {
             NSLog(@"Unable to Connect To FCM. %@",error);
         }
         else
         {
             NSLog((@"Connected To FCM"));
         }
     }];
}

当我使用与 Xcode 连接的 iPhone 运行上述代码时，当我从 Firebase 控制台发送消息时，我遇到了以下问题

1).当应用程序处于前台(事件)时，日志显示以下消息

Mesage Id : (null){
    CustommData = "First Message";
    "collapse_key" = "abcd.iospush.FireBasePush";
    from = 555551391562;
    notification =     {
        badge = 4;
        body = "Test Message";
        e = 1;
        sound = default;
        sound2 = default;
    };
}

注意消息 ID 为 null。

2).无论应用程序处于前台、后台还是关闭状态，我的手机在通知中心中均不显示任何通知

我希望用户在应用程序处于后台、前台或关闭时收到推送通知

Answer 1

您必须调用 [[UIApplication sharedApplication] registerForRemoteNotifications]; 才能正确注册远程通知。

为后台使用配置远程通知

您是否已将应用的后台模式配置为接受远程通知？ 您可以通过点击:项目名称 -> 功能 -> 后台模式

打开它，然后勾选远程通知旁边的框，如下面的屏幕截图所示。