Swift 3 - Hide Elements


Im trying to hide a element using swift 3. The element won't hide if its in session.dataTask, but if I move it outside session.dataTask the element hides fine. Is it possible to hide a element in session.dataTask?

@IBOutlet weak var login_box: UIStackView! let task = session.dataTask(with: request as URLRequest) { ( data, response, error) in guard let data = data, let _:URLResponse = response, error == nil else { print("error") return } //Following won't hide element self.login_box.isHidden = true } //If placed here element hides fine login_box.isHidden = true task.resume()


First of all you need to start URLSessionDataTask instance using resume and always perform UI changes on main thread.

let task = session.dataTask(with: request as URLRequest) { (data, response, error) in guard let data = data, let _:URLResponse = response, error == nil else { print("error") return } DispatchQueue.main.async { self.login_box.isHidden = true } } task.resume()

It will take some time get response from server (depends on your internet speed), but if error is not nil then it will not hide your login_box because it is return from the block.


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