CODEWITHSUNDEEP
iosswiftviewswipe
swift
swift

Reputation: 75

Changing views with swipe gesture

I have googled as much as I can to try to find this. I am new to app development and programming in general. I want to have a view return to the previous view via swipe gesture.

Here is my ViewController.swift

import UIKit

class ViewController: UIViewController {

@IBOutlet var changeView: UIView!

override func viewDidLoad() {
    super.viewDidLoad()
    let recognizer: UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: "swipeDown:")
    recognizer.direction = .Down
    self.view .addGestureRecognizer(recognizer)

    func swipeDown(recognizer : UISwipeGestureRecognizer) {
        self.performSegueWithIdentifier("HowToPlaySegue", sender: self)
    }
}

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

Now with that there I am also a beginner with the new Xcode. If i remember correctly gestures used to be like buttons with a simple control-drag to the view and it would work.

In xcode I have my view that I want to swipe and I have the main view. What am I doing wrong?

error I receive now. Right now my AppDelegate.swift has not been touched. I believe that is where my selector goes, but I am unsure and I couldn't find much about this particular stuff.

[Swipe_t.ViewController swipeDown:]: unrecognized selector sent to instance 0x7fe94bc7a080 2015-03-05 23:10:15.637 Swipe't[32779:3391684] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[Swipe_t.ViewController swipeDown:]: unrecognized selector sent to instance

Upvotes: 0

Views: 2267

Answers (1)

Taha Samad
Taha Samad

Reputation: 1135

1) Your swipeDown function is inside viewDidLoad. Shouldn't that be outside the viewDidLoad braces?

EDIT(Adding Modified Code)

override func viewDidLoad() 
{
    super.viewDidLoad()
    let recognizer: UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: "swipeDown:")
    recognizer.direction = .Down
    self.view.addGestureRecognizer(recognizer)
}

func swipeDown(recognizer : UISwipeGestureRecognizer) 
{
    self.performSegueWithIdentifier("HowToPlaySegue", sender: self)
}

2) Secondly, though I am not sure about your use case,from information you have provided, I think you can utilize UIPageViewController. No need to implement swiping behavior yourself.

Upvotes: 1

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