Swift image do not fit in the scrollview - ios

Question

i have a scrollview wich load a image to zoom in and zoom out , the problem is that i want the image to be loaded full like this
http://www.capital.cl/wp-content/uploads/2015/04/avengers.jpg
so the user can see the complete image first
but it looks like this
this is the code
import UIKit
class Paso2: UIViewController, UIScrollViewDelegate {
#IBOutlet weak var scrollView: UIScrollView!
#IBOutlet weak var noCheckBox2: CheckBox!
#IBOutlet weak var siCheckBox2: CheckBox!
var imageView = UIImageView()
override func viewDidLoad() {
super.viewDidLoad()
scrollView.delegate = self
// imageView.contentMode = UIViewContentMode.ScaleAspectFill
// imageView.clipsToBounds = true
imageView.image = UIImage(named: "avengers.jpg")
let imagee = UIImage(named: "avengers.jpg")
let size = imagee?.size
imageView.frame = CGRectMake(0, 0, size!.width, size!.height)
imageView.contentMode = .Top
scrollView.addSubview(imageView)
scrollView.contentSize = size!
let scrollViewFrame = scrollView.frame
let scaleWidth = scrollViewFrame.size.width / scrollView.contentSize.width
let scaleHeight = scrollViewFrame.size.height / scrollView.contentSize.height
let minScale = min(scaleHeight, scaleWidth)
scrollView.minimumZoomScale = 1
scrollView.maximumZoomScale = 4
scrollView.zoomScale = minScale
centerScrollViewContents()
}
func centerScrollViewContents(){
let boundsSize = scrollView.bounds.size
var contentsFrame = imageView.frame
if contentsFrame.size.width < boundsSize.width {
contentsFrame.origin.x = (boundsSize.width - contentsFrame.size.width) / 2
}
else {
contentsFrame.origin.x = 0
}
if contentsFrame.size.height < boundsSize.height {
contentsFrame.origin.y = (boundsSize.height - contentsFrame.size.height) / 2
}
else {
contentsFrame.origin.y = 0
}
imageView.frame = contentsFrame
// scrollView.frame = contentsFrame
}
func scrollViewDidZoom(scrollView: UIScrollView) {
centerScrollViewContents()
}
func viewForZoomingInScrollView(scrollView: UIScrollView) -> UIView? {
return imageView
}
Help plz

Answer 1

Just change this.
imageView.contentMode = .ScaleAspectFit
without zoom
with zoom

Answer 2

You should use .contentMode property of the UIImageView for the proper representation of the image.
This is small comparison of the content modes.

Answer 3

You want to display full image without scrolling or you want to display scrollable image?
Try this code for fast start:
class ViewController: UIViewController {
#IBOutlet weak var scrollView: UIScrollView!
var imageView = UIImageView()
private var imageViewOriginalSize = CGRect ()
override func viewDidLoad() {
super.viewDidLoad()
imageView.image = UIImage(named: "avengers.jpg")
imageView.contentMode = .ScaleAspectFit
let size = UIScreen.mainScreen().bounds
imageViewOriginalSize = size
imageView.frame = CGRectMake(0, 0, size.width, size.height)
scrollView.addSubview(imageView)
let pinch = UIPinchGestureRecognizer(target: self, action: #selector(ViewController.pinchGestureRecognizerAction))
self.scrollView.addGestureRecognizer(pinch)
}
func pinchGestureRecognizerAction(gestureRecoginzer: UIPinchGestureRecognizer) {
imageView.frame.size.height = imageViewOriginalSize.height*gestureRecoginzer.scale
imageView.frame.size.width = imageViewOriginalSize.width*gestureRecoginzer.scale
imageView.frame.origin.x = imageViewOriginalSize.origin.x*gestureRecoginzer.scale
imageView.frame.origin.y = imageViewOriginalSize.origin.y*gestureRecoginzer.scale
scrollView.contentSize = imageView.frame.size
}}