IOS中的Firebase集成错误

Question

我在我的应用程序中集成了 firebase 推送通知。我已经很好地安装了 cocoapods，并在 appdelegate.m 文件中为 firebase 消息传递执行了所有代码。还创建了证书并上传到我的项目的firebase，我正确地遵循了所有程序，但是当我运行应用程序时，我遇到了一些错误并且应用程序没有运行并在链接时显示错误。我的 firebase 代码是这样的，

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

        [FIRApp configure];

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

        UIUserNotificationType type=(UIUserNotificationTypeAlert | UIUserNotificationTypeBadge | UIUserNotificationTypeSound);
        UIUserNotificationSettings *settings=[UIUserNotificationSettings settingsForTypes:type categories:nil];

        [application registerUserNotificationSettings:settings];
        [application registerForRemoteNotifications];
        return YES;
    }

    -(void)tokenRefreshCallBack:(NSNotification *)notification{
        NSString *refreshToken=[[FIRInstanceID instanceID]token];
        NSLog(@"Instance IDToken : %@",refreshToken);
        [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");
            }
            }];
    }

    -(void)application:(UIApplication *)application didReceiveRemoteNotification:(nonnull NSDictionary *)userInfo fetchCompletionHandler:(nonnull void (^)(UIBackgroundFetchResult))completionHandler{
        NSLog(@"Message ID : %@",userInfo[@"gcm.message_id"]);
        NSLog(@"%@",userInfo);
    }

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Answer 1

David East 爵士的回答 (https://stackoverflow.com/a/38226058/3231194)：

转到Build Settings > Other Linker Flags > 换行$(inherited)。

执行Cmd+Ctrl+K 进行清理，然后构建。

---

我也想添加这些步骤，而不是Cmd+Ctrl+K，应该是：

1. Cmd+Shift+K。然后：
2. Cmd+AltOption+Shift+K
3. 最后，构建它。