無法在swift中發出GET請求時觸發終端

Question

您好，我正在嘗試從我的服務器發出get請求，但由於我檢查了日誌並且即使沒有擊中最終端點，我也無法擊中端點。端點需要已經添加到請求字段的授權。我試圖獲取json值並將它們顯示爲表格單元格。但是，當我試圖檢索值返回零。它從不嘗試擊中端點。我試圖把打印語句print("Session)"檢查它是否調用dataWithRequest，但是如果不能這樣做。請問我在這裏做錯了什麼？

func getLocalData() -> [[String:AnyObject]] { 
     var json:[[String:AnyObject]]? 
     let endPoint = "http://******************" 

     let url:NSURL? = NSURL(string: endPoint) 
     let session = NSURLSession.sharedSession() 

     let request:NSMutableURLRequest = NSMutableURLRequest(URL: url!) 

     request.HTTPMethod = "GET" 
     request.setValue("application/json", forHTTPHeaderField: "Content-Type") 
     request.addValue(token!, forHTTPHeaderField: "Authorization-Header") 


     let task = session.dataTaskWithRequest(request) {(data, response, error) -> Void in 
      print("Session") //not able to get in here 
      guard let data = data where error == nil else { 
       //network error 
       print("Error with network: \(error?.localizedDescription)") 
       return 
      } 

      let httpResponse = response as! NSHTTPURLResponse//HTTPURLResponse 
      let statusCode = httpResponse.statusCode 

      if statusCode == 200 { 
       do { 
        print("Here buddy") 
        json = try NSJSONSerialization.JSONObjectWithData(data, options: .AllowFragments) as? [[String: AnyObject]] 
        // return json 
       } 

       catch { 
        print("Error in json") 
       } 
      } 
     } 

     task.resume() 

     print("JSON: \(json)") //prints nil as it never attempts to make the request to the server 

     return json 
} 

，並在我的TableListController我試圖調用此函數，它抱怨的fatal error: unexpectedly found nil while unwrapping an Optional value

class DealListController: UITableViewController { 
    let myDeals = DealList() 
    var dealsArray = [] 

    override func awakeFromNib() { 
     super.awakeFromNib() 
     dealsArray = myDeals.getLocalData()! //complains about error here 
    } 
} 

Answer 1

讓添加這些東西到你的Info.plist

更新：讓使用完成處理程序而不是返回值

func getLocalData(completion: (json: [[String:AnyObject]]?) -> Void) { 
    let endPoint = "http://******************" 

    let url:NSURL? = NSURL(string: endPoint) 
    let session = NSURLSession.sharedSession() 

    let request:NSMutableURLRequest = NSMutableURLRequest(URL: url!) 

    request.HTTPMethod = "GET" 
    request.setValue("application/json", forHTTPHeaderField: "Content-Type") 
    request.addValue("", forHTTPHeaderField: "Authorization-Header") 


    let task = session.dataTaskWithRequest(request) {(data, response, error) -> Void in 
     print("Session") //not able to get in here 
     guard let data = data where error == nil else { 
      //network error 
      print("Error with network: \(error?.localizedDescription)") 
      completion(json: nil) 
      return 
     } 

     let httpResponse = response as! NSHTTPURLResponse//HTTPURLResponse 
     let statusCode = httpResponse.statusCode 

     if statusCode == 200 { 
      do { 
       print("Here buddy") 
       let json = try NSJSONSerialization.JSONObjectWithData(data, options: .AllowFragments) as? [[String: AnyObject]] 
       // return json 
       completion(json: json) 
      } 

      catch { 
       print("Error in json") 
       completion(json: nil) 
      } 
     } 
    } 

    task.resume() 
} 

和：

myDeals.getLocalData { json in 
    print("json: \(json)") 
    dealsArray = json! 
}