Swift - How can I make an image full screen when clicked and then original size when clicked again? [closed]

Here is code which creates a full screen image (with black bars to preserve aspect ratio) when an image is clicked.

To use this, add this code to your ViewController which holds the image.

Then, for your imageView that you want to expand, check the box for userInteractionEnabled in the Attributes Inspector, and add a TapGestureRecognizer to it and set it call imageTapped.

@IBAction func imageTapped(sender: UITapGestureRecognizer) {    let imageView = sender.view as! UIImageView    let newImageView = UIImageView(image: imageView.image)    newImageView.frame = UIScreen.main.bounds    newImageView.backgroundColor = .blackColor()    newImageView.contentMode = .ScaleAspectFit    newImageView.userInteractionEnabled = true    let tap = UITapGestureRecognizer(target: self, action: "dismissFullscreenImage:")    newImageView.addGestureRecognizer(tap)    self.view.addSubview(newImageView)    self.navigationController?.isNavigationBarHidden = true    self.tabBarController?.tabBar.isHidden = true}func dismissFullscreenImage(sender: UITapGestureRecognizer) {    self.navigationController?.isNavigationBarHidden = false    self.tabBarController?.tabBar.isHidden = false    sender.view?.removeFromSuperview()}

This code works by creating a new fullscreen image which covers everything else. It has its own TapGestureRecognizer that removes the fullscreen image from its superView (and thus uncovers the original screen).

Update for Swift 3 and 4:

@IBAction func imageTapped(_ sender: UITapGestureRecognizer) {    let imageView = sender.view as! UIImageView    let newImageView = UIImageView(image: imageView.image)    newImageView.frame = UIScreen.main.bounds    newImageView.backgroundColor = .black    newImageView.contentMode = .scaleAspectFit    newImageView.isUserInteractionEnabled = true    let tap = UITapGestureRecognizer(target: self, action: #selector(dismissFullscreenImage))    newImageView.addGestureRecognizer(tap)    self.view.addSubview(newImageView)    self.navigationController?.isNavigationBarHidden = true    self.tabBarController?.tabBar.isHidden = true}@objc func dismissFullscreenImage(_ sender: UITapGestureRecognizer) {    self.navigationController?.isNavigationBarHidden = false    self.tabBarController?.tabBar.isHidden = false    sender.view?.removeFromSuperview()}