NSURLSessionDataTask dataTaskWithURL completion handler not getting called

by

If you’re going to use the completion block rendition of the data task, rather than specifying a delegate of nil, like this:

NSURLSession *defaultSession = [NSURLSession sessionWithConfiguration: defaultConfigObject
                                                             delegate: nil
                                                        delegateQueue: [NSOperationQueue mainQueue]];

You should instead instantiate your session using the method that does not take a delegate at all:

NSURLSession *defaultSession = [NSURLSession sessionWithConfiguration: defaultConfigObject];

Or, alternatively, given that you’re not customizing your configuration at all, you can skip the instantiation of the NSURLSessionConfiguration altogether and use the shared NSURLSession:

NSURLSession *defaultSession = [NSURLSession sharedSession];

But, bottom line, you should not use the sessionWithConfiguration:delegate:queue: rendition unless you’re going to implement the delegates, in which case you wouldn’t use the rendition of the NSURLSessionDataTask method with the completionHandler parameter.

Also, make sure your device/simulator is running iOS 7.0 or greater.

More Related Contents:

  1. How do I make an HTTP request in Swift?
  2. NSURLSession with NSBlockOperation and queues
  3. Send POST request using NSURLSession
  4. How to make HTTP request in Swift?
  5. NSURLSession: How to increase time out for URL requests?
  6. Sort An Array in Objective C with Multiple Items [closed]
  7. Posting On facebook friends wall [closed]
  8. Setting a button’s target/action and passing a particular string to the action [closed]
  9. How to link to apps on the app store
  10. How to programmatically send SMS on the iPhone?
  11. Assertion failure in dequeueReusableCellWithIdentifier:forIndexPath:
  12. Placeholder in UITextView
  13. @property retain, assign, copy, nonatomic in Objective-C
  14. Looping a video with AVFoundation AVPlayer?
  15. What is NSZombie?
  16. iOS: Modal ViewController with transparent background
  17. UIButton Long Press Event
  18. How can you rotate text for UIButton and UILabel in Objective-C?
  19. UITableview: How to Disable Selection for Some Rows but Not Others
  20. distanceFromLocation – Calculate distance between two points
  21. How to turn the iPhone camera flash on/off?
  22. How to disable back swipe gesture in UINavigationController on iOS 7
  23. How to calculate actual font point size in iOS 7 (not the bounding rectangle)?
  24. How to copy sqlite database when application is launched in iOS?
  25. Cocoapods ld: library not found for -lPods-Projectname
  26. Highlight just the text in a UILabel
  27. iPhone storage in tmp directory
  28. NEHotspotHelper annotations not appearing
  29. How can I fix the “UIPopoverController is deprecated” warning?
  30. MKMapView show incorrectly saved region

Leave a Comment