UIScrollViewで画像をピンチで拡大したり縮小する
UIScrollViewの中にある画像を拡大したり縮小するサンプルです。
ピンチで画像を大きくしたり、小さくします。
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| import UIKit | |
| class ViewController: UIViewController, UIScrollViewDelegate { | |
| var scrollView: UIScrollView! | |
| var imageView: UIImageView! | |
| override func viewDidLoad() { | |
| super.viewDidLoad() | |
| scrollView = UIScrollView() | |
| scrollView.frame = self.view.frame | |
| scrollView.delegate = self | |
| scrollView.maximumZoomScale = 3.0 | |
| scrollView.minimumZoomScale = 1.0 | |
| self.view.addSubview(scrollView) | |
| imageView = UIImageView() | |
| imageView.image = UIImage(named: "snorlax") | |
| imageView.frame = scrollView.frame | |
| scrollView.addSubview(imageView) | |
| } | |
| func viewForZooming(in scrollView: UIScrollView) -> UIView? { | |
| return self.imageView | |
| } | |
| } |