Swift 在ScrollView中缩放图像
我有一个滚动视图,其中有一些图像,我水平滚动。我想用捏手势缩放。这是我正在使用的代码,但它不起作用。我似乎不知道我做错了什么。有什么建议吗Swift 在ScrollView中缩放图像,swift,xcode,uiscrollview,pinchzoom,zooming,Swift,Xcode,Uiscrollview,Pinchzoom,Zooming,我有一个滚动视图,其中有一些图像,我水平滚动。我想用捏手势缩放。这是我正在使用的代码,但它不起作用。我似乎不知道我做错了什么。有什么建议吗 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:
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
}
let scrollView=UIScrollView(帧:CGRect(x:0,y:100,宽度:UIScreen.main.bounds.size.width,高度:(UIScreen.main.bounds.size.height-140)))var-frame:CGRect=CGRect(x:0,y:0,宽度:0,高度:0)
var subView=UIImageView()
重写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=“第1页,共\(OfferImage.count)”
self.view.addSubview(滚动视图)
对于0..UIView中的索引{
//让image=self.view.findSubview(带标记:1)
返回self.subView
}
您需要将PinchGestureRecognizer
添加到情节提要中,然后将其链接到如下函数
@IBAction func scaleImage(_ sender: UIPinchGestureRecognizer) {
self.subView.transform = self.subView.transform.scaledBy(x: sender.scale, y: sender.scale)
sender.scale = 1
}
注意:子视图
应替换为您尝试缩放的视图。1)设置缩放比例
scrollView.maximumZoomScale = 10
scrollView.minimumZoomScale = 1
2) 设置滚动视图代理,在视图中返回图像进行缩放
func viewForZooming(in scrollView: UIScrollView) -> UIView? {
return myImageView
}
所以我尝试了这个方法,它确实能识别挤压手势,但它不会缩放图像,只是会闪烁一点。@Stephanie对你有用吗?或者你仍然有问题吗?我想缩放子视图,但问题是它只应用于scrollView中的最后一个图像,刚才我尝试用scrollView本身替换它虽然它不是我想要的样子,但它还是起作用了。谢谢你的帮助!看看另一个答案,这个答案实际上没有使用滚动视图来缩放。