オプション（<OS_dispatch_data：data [0x7f97b145f2f0] = {leaf、size = 17290、buf = 0x11a63f000}>）

Question

JSONを使用してiOSでWebサービスを使用しようとしましたが、最後に上記のエラーが発生します。それは起こって..

Answer 1

があなたのDOとキャッチを修正してみ..

import UIKit 

class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate { 

    @IBOutlet weak var lbl_studentID: UILabel! 
    @IBOutlet weak var image: UIImageView! 

    override func viewDidLoad() { 
     super.viewDidLoad() 
     // Do any additional setup after loading the view, typically from a nib. 
    } 

    override func didReceiveMemoryWarning() { 
     super.didReceiveMemoryWarning() 
     // Dispose of any resources that can be recreated. 
    } 

    @IBAction func btnfunc_getStudentID(sender: UIButton) { 

     let data:String = "http://neo4j.nannasgroup.com/service.php" 
     let url:NSURL = NSURL.init(string: data)! 
     let req:NSURLRequest = NSURLRequest.init(URL: url) 
     let res:AutoreleasingUnsafeMutablePointer<NSURLResponse?>=nil 

     do { 
      let dataVal = try NSURLConnection.sendSynchronousRequest(req, returningResponse: res) 

      do { 
       if let jsonResult = try NSJSONSerialization.JSONObjectWithData(dataVal, options: []) as? NSMutableArray { 
        lbl_studentID.text = "\(jsonResult)" 
       } 
      } catch let error as NSError { 
       print(error.localizedDescription) 
      } 
     } catch let error as NSError { 
      print("incatch" + error.localizedDescription) 
     } 

    } 

    @IBAction func selectPicture(sender: UIButton) { 

     let ImagePicker = UIImagePickerController() 
     ImagePicker.delegate = self 
     ImagePicker.sourceType = UIImagePickerControllerSourceType.PhotoLibrary 

     self.presentViewController(ImagePicker, animated: true, completion: nil) 
    } 

    func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) { 

     image.image = info[UIImagePickerControllerOriginalImage] as? UIImage 
     self.dismissViewControllerAnimated(true, completion: nil) 
    } 
    @IBAction func upload_request(sender: UIButton) { 
     } 
} 

Answer 2

単なる文字列

へのNSDataを変換する//

NSString *String = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]; 
    NSLog(@"responseObject:%@",String);