在ScrollView中缩放图像

我有一个滚动视图，里面有一些图像，我水平滚动。我想使用捏手势进行缩放。这是我正在使用的代码，但它不起作用。我似乎无法弄清楚我做错了什么。有什么建议吗？在ScrollView中缩放图像

let scrollView = UIScrollView(frame: CGRect(x: 0, y: 100, width: UIScreen.main.bounds.size.width , height: (UIScreen.main.bounds.size.height - 140))) var frame: CGRect = CGRect(x: 0, y: 0, width: 0, height: 0) 
var subView = UIImageView() 
override func viewDidLoad() { 
    super.viewDidLoad() 
    getOfferImages() 
    swipeGesture() 
    setupView() 
    scrollView.delegate = self 
    scrollView.minimumZoomScale = 1.0 
    scrollView.maximumZoomScale = 4.0 
} 
func configureScrollView(){ 

    scrollView.backgroundColor = UIColor.black 
    scrollView.showsHorizontalScrollIndicator = false 
    scrollView.isUserInteractionEnabled = true 
    scrollView.clipsToBounds = true 
    scrollView.bouncesZoom = true 

    pageNumberlabel.text = "1 of \(offersImagesArray.count)" 
    self.view.addSubview(scrollView) 

    for index in 0..<images.count { 

     frame.origin.x = self.scrollView.frame.size.width * CGFloat(index) 
     frame.size = self.scrollView.frame.size 
     subView = UIImageView(frame: frame) 
     subView.tag = 1 
     subView.contentMode = .scaleToFill 
     subView.isUserInteractionEnabled = true 
     subView.sd_setImage(with: images[index], placeholderImage: UIImage(named:""), options: [.continueInBackground]) 
     self.scrollView.addSubview(subView) 
    } 
    self.scrollView.isPagingEnabled = true 
    self.scrollView.contentSize = CGSize(width: (self.scrollView.frame.size.width * CGFloat(images.count)), height: self.scrollView.frame.size.height) 

} 
func viewForZoomingInScrollView(scrollView: UIScrollView) -> UIView? { 
    // let image = self.view.findSubview(withTag: 1) 
    return self.subView 
}

来源

2017-04-25 Stephanie

您需要将PinchGestureRecognizer添加到您的故事板，然后将其链接到像下面这样的功能。

@IBAction func scaleImage(_ sender: UIPinchGestureRecognizer) { 
    self.subView.transform = self.subView.transform.scaledBy(x: sender.scale, y: sender.scale) 
    sender.scale = 1 
}

注：subView应该要尝试缩放视图来代替。

来源

2017-04-25 16:09:21 MwcsMac

所以，我想这回你的形象，它会识别缩放手势，但它不不放大图像，它只是闪烁一点。 – Stephanie

@Stephanie请参阅编辑。 – MwcsMac

@Stephanie为你工作过吗？还是你仍然有问题？ – MwcsMac

1）集变焦倍数

scrollView.maximumZoomScale = 10 
scrollView.minimumZoomScale = 1

2）设置滚动视图的委托，在viewForZooming

func viewForZooming(in scrollView: UIScrollView) -> UIView? { 
    return myImageView 
}

来源

2018-02-26 11:56:07 f3dm76

在ScrollView中缩放图像

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