ios - How to cancel on-going HTTP request in Swift? -

my code get request this:

dispatch_async(dispatch_get_global_queue(dispatch_queue_priority_default, 0), { () -> void in     // ...      let task = nsurlsession.sharedsession().datataskwithrequest(request) { data, response, error in         if error != nil {             println("error = \(error)")             return         }          if let httpresponse = response as? nshttpurlresponse {             if httpresponse.statuscode == 200 { // got response                 var err: nserror?                 if let json = nsjsonserialization.jsonobjectwithdata(data!, options: nil, error: &err) as? [string : anyobject] {                     // success decoding json                 } else {                     // failed -> stop activity indicator                     dispatch_async(dispatch_get_main_queue(), { () -> void in                         self.activityindicator.stopanimating()                     })                 }             }             task.resume()         })     } } 

if viewwilldisappear() gets called before request finishes, want stop request.

right now, seems view doesn't disappear before request finishes. there way cancel ongoing get/post request?

yes, have store outside access - task has method cancel() can use, you're using resume().

for viewdiddisappear() i'd recommend having object property - var currenttask: nsurlsessiontask?, in dispatch have self.currenttask = ... instead of let task = ... , in viewdiddisappear() call self.currenttask?.cancel().