在websocket/SignalR響應中獲取「\ n」？

Question

我收到了一個websocket/SignalR響應中的「\ n」，我似乎無法弄清楚爲什麼。我試圖改變我的響應對象的數據類型，解析它，就好像它是JSON，但仍然無法擺脫「\ n」。

我該如何刪除這個「\ n」並像其他任何JSON對象/響應一樣處理？

代碼以供參考：

-(void)SignalR{ 

    WebServices *services = [[WebServices alloc] init]; 

    SRHubConnection *hubConnection = [SRHubConnection connectionWithURLString:@"xxx"]; 

    SRHubProxy *proxy = [hubConnection createHubProxy:@"xxx"]; 

    [services callGetSRAlertGroupNames:^(NSMutableArray *alertGroupNameArray){ 
     NSLog(@"SR ALERT GROUP NAMES: %@", alertGroupNameArray); 

     [services callGetSRNotificationGroupNames:^(NSMutableArray *notificationGroupNameArray) { 
      NSLog(@"SR NOTIFICATION GROUP NAMES: %@", notificationGroupNameArray); 

      NSArray *combinedArray=[alertGroupNameArray arrayByAddingObjectsFromArray:notificationGroupNameArray]; 

      // Register for connection lifecycle events 
      [hubConnection setStarted:^{ 

       NSLog(@"Connection Started"); 

       for (NSString *groupName in combinedArray){ 
        [proxy invoke:@"Subscribe" withArgs:@[groupName] completionHandler:nil]; 
       } 

      }]; 
      [hubConnection setReceived:^(NSString *data) { 

       NSLog(@"CONNECTION RECIEVED - %@",data); 

      }]; 
      [hubConnection setConnectionSlow:^{ 
       NSLog(@"Connection Slow"); 
      }]; 
      [hubConnection setReconnecting:^{ 
       NSLog(@"Connection Reconnecting"); 
      }]; 
      [hubConnection setReconnected:^{ 
       NSLog(@"Connection Reconnected"); 
      }]; 
      [hubConnection setClosed:^{ 
       NSLog(@"Connection Closed"); 
      }]; 
      [hubConnection setError:^(NSError *error) { 
       NSLog(@"Connection Error %@",error); 
      }]; 

      [hubConnection start]; 

     }]; 
    }]; 
} 

已註銷響應樣本：

CONNECTION RECIEVED - { 
    A =  (
     "{ 
\n \"NotificationType\": 1, 
\n \"TelemetryDetails\": { 
\n \"serialNumber\": \"xxx\", 
\n \"name\": \"sf-top\", 
\n \"statusId\": 2, 
\n \"buildVersion\": \"xxx\", 
\n \"securityModeId\": 2, 
\n \"IP\": \"xxx\", 
\n \"priority\": 1, 
\n \"bandwidthUpload\": 0.00, 
\n \"bandwidthDownload\": 0.00, 
\n \"bandwidthInternal\": null, 
\n \"totalBandwidthUpload\": 3107397.00, 
\n \"totalBandwidthDownload\": 8078656.00, 
\n \"totalBandwidthInternal\": null, 
\n \"usage\": \"8078656/3107397\", 
\n \"lastUpdateTime\": \"2017-03-02T16:27:57.1736937Z\", 
\n \"buildVersionUpdatingInProgress\": false, 
\n \"transportType\": 2, 

Answer 1

簡單。

您可以使用：

data = [data stringByReplacingOccurrencesOfString:@"\n" withString:@""]; 

但因爲這個問題顯然是從您的網絡服務來這一招是「髒」，我猜。

編輯：

你在哪裏更換出現？

你能告訴我這個日誌是什麼嗎？

[hubConnection setReceived:^(NSString *data) { 

     NSLog(@"CONNECTION RECIEVED - %@",data); 
     NSString *newString = [data stringByReplacingOccurrencesOfString:@"\n" withString:@""]; 
     NSLog(@"NEW STRING - %@", newString); 
    }]; 

編輯2：

好了，你可以嘗試添加完成處理器超出這個變量。

__block NSString *newString; 

或者你也可以試試這個

[hubConnection setReceived:^(NSString *data) { 

      NSLog(@"CONNECTION RECIEVED - %@",data); 

      [self replaceOccurrences: data]; 

}]; 

- (void)replaceOccurrences:(NSString *)data { 
    NSString *newString = [data stringByReplacingOccurrencesOfString:@"\n" withString:@""]; 
    NSLog("New String = %@", newString); 
} 

但你真的應該檢查你的後端，這種反應是不以適當的格式。