How to find and cancel a task in NSURLSession?
To get tasks list you can use NSURLSession's method
- (void)getTasksWithCompletionHandler:(void (^)(NSArray *dataTasks, NSArray *uploadTasks, NSArray *downloadTasks))completionHandler;Asynchronously calls a completion callback with all outstanding data, upload, and download tasks in a session.
Then check task.originalRequest.URL for returned tasks to find the one you want to cancel.
Based on all the answers below, I'd go for something like this:
Swift 5
func cancelTaskWithUrl(_ url: URL) { URLSession.shared.getAllTasks { tasks in tasks .filter { $0.state == .running } .filter { $0.originalRequest?.url == url }.first? .cancel() } }You also probably want to account for your task completion handler, since canceling the task will result Error in that completion handler.
Hope below code help.
-(IBAction)cancelUpload:(id)sender { if (_uploadTask.state == NSURLSessionTaskStateRunning) { [_uploadTask cancel]; } }