Ios 在UIScrollView中缩放时未调用ScrollViewDiEndZooming
这可能是一个Xcode错误？我在Ios 在UIScrollView中缩放时未调用ScrollViewDiEndZooming,ios,swift,xcode,optimization,uiscrollview,Ios,Swift,Xcode,Optimization,Uiscrollview,这可能是一个Xcode错误？我在UIScrollView中有一个UIImage，它是用代码编程完成的。用户可以使用缩放手势或双击图像放大图像。这部分很好用 接下来，我尝试检测缩放手势或双击后滚动视图何时完成缩放，使用下面的功能ScrollViewDiEndZooming。但是，ScrollViewDiEndZooming从未被调用，也没有打印行我刚刚完成了缩放 代码不工作： func scrollViewDidEndZooming(scrollView: UIScrollView, with v
UIScrollViewUIImageScrollViewDiEndZoomingScrollViewDiEndZooming我刚刚完成了缩放
代码不工作：
func scrollViewDidEndZooming(scrollView: UIScrollView, with view: UIView?, atScale scale: CGFloat) {
print("I just finished zooming!")
}
class ScrollViewController: UIViewController, UIScrollViewDelegate {
var scrollView: UIScrollView!
var imageView: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
imageView = UIImageView(image: UIImage(named: "image.png"))
scrollView = UIScrollView(frame: view.bounds)
scrollView.backgroundColor = UIColor.blackColor()
scrollView.contentSize = imageView.bounds.size
scrollView.autoresizingMask = [UIViewAutoresizing.FlexibleWidth, UIViewAutoresizing.FlexibleHeight]
scrollView.contentOffset = CGPoint(x: 1000, y: 450)
scrollView.addSubview(imageView)
view.addSubview(scrollView)
scrollView.delegate = self
setZoomScale()
setupGestureRecognizer()
}
func viewForZoomingInScrollView(scrollView: UIScrollView) -> UIView? {
return imageView
}
override func viewWillLayoutSubviews() {
setZoomScale()
}
func setZoomScale() {
let imageViewSize = imageView.bounds.size
let scrollViewSize = scrollView.bounds.size
let widthScale = scrollViewSize.width / imageViewSize.width
let heightScale = scrollViewSize.height / imageViewSize.height
scrollView.minimumZoomScale = min(widthScale, heightScale)
scrollView.zoomScale = 1.0
}
func scrollViewDidZoom(scrollView: UIScrollView) {
let imageViewSize = imageView.frame.size
let scrollViewSize = scrollView.bounds.size
let verticalPadding = imageViewSize.height < scrollViewSize.height ? (scrollViewSize.height - imageViewSize.height) / 2 : 0
let horizontalPadding = imageViewSize.width < scrollViewSize.width ? (scrollViewSize.width - imageViewSize.width) / 2 : 0
scrollView.contentInset = UIEdgeInsets(top: verticalPadding, left: horizontalPadding, bottom: verticalPadding, right: horizontalPadding)
}
func scrollViewDidEndZooming(scrollView: UIScrollView, with view: UIView?, atScale scale: CGFloat) {
print("I just finished zooming!")
}
func setupGestureRecognizer() {
let doubleTap = UITapGestureRecognizer(target: self, action: "handleDoubleTap:")
doubleTap.numberOfTapsRequired = 2
scrollView.addGestureRecognizer(doubleTap)
}
func handleDoubleTap(recognizer: UITapGestureRecognizer) {
if (scrollView.zoomScale > scrollView.minimumZoomScale) {
scrollView.setZoomScale(scrollView.minimumZoomScale, animated: true)
} else {
scrollView.setZoomScale(scrollView.maximumZoomScale, animated: true)
}
}
}
问题：
func scrollViewDidEndZooming(scrollView: UIScrollView, with view: UIView?, atScale scale: CGFloat) {
print("I just finished zooming!")
}
class ScrollViewController: UIViewController, UIScrollViewDelegate {
var scrollView: UIScrollView!
var imageView: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
imageView = UIImageView(image: UIImage(named: "image.png"))
scrollView = UIScrollView(frame: view.bounds)
scrollView.backgroundColor = UIColor.blackColor()
scrollView.contentSize = imageView.bounds.size
scrollView.autoresizingMask = [UIViewAutoresizing.FlexibleWidth, UIViewAutoresizing.FlexibleHeight]
scrollView.contentOffset = CGPoint(x: 1000, y: 450)
scrollView.addSubview(imageView)
view.addSubview(scrollView)
scrollView.delegate = self
setZoomScale()
setupGestureRecognizer()
}
func viewForZoomingInScrollView(scrollView: UIScrollView) -> UIView? {
return imageView
}
override func viewWillLayoutSubviews() {
setZoomScale()
}
func setZoomScale() {
let imageViewSize = imageView.bounds.size
let scrollViewSize = scrollView.bounds.size
let widthScale = scrollViewSize.width / imageViewSize.width
let heightScale = scrollViewSize.height / imageViewSize.height
scrollView.minimumZoomScale = min(widthScale, heightScale)
scrollView.zoomScale = 1.0
}
func scrollViewDidZoom(scrollView: UIScrollView) {
let imageViewSize = imageView.frame.size
let scrollViewSize = scrollView.bounds.size
let verticalPadding = imageViewSize.height < scrollViewSize.height ? (scrollViewSize.height - imageViewSize.height) / 2 : 0
let horizontalPadding = imageViewSize.width < scrollViewSize.width ? (scrollViewSize.width - imageViewSize.width) / 2 : 0
scrollView.contentInset = UIEdgeInsets(top: verticalPadding, left: horizontalPadding, bottom: verticalPadding, right: horizontalPadding)
}
func scrollViewDidEndZooming(scrollView: UIScrollView, with view: UIView?, atScale scale: CGFloat) {
print("I just finished zooming!")
}
func setupGestureRecognizer() {
let doubleTap = UITapGestureRecognizer(target: self, action: "handleDoubleTap:")
doubleTap.numberOfTapsRequired = 2
scrollView.addGestureRecognizer(doubleTap)
}
func handleDoubleTap(recognizer: UITapGestureRecognizer) {
if (scrollView.zoomScale > scrollView.minimumZoomScale) {
scrollView.setZoomScale(scrollView.minimumZoomScale, animated: true)
} else {
scrollView.setZoomScale(scrollView.maximumZoomScale, animated: true)
}
}
}
这里可能发生了什么，为什么不ScrollViewDiEndZooming（…）
接到电话了吗
注意：我参考了下面的文档，但运气不好。
完整代码：
func scrollViewDidEndZooming(scrollView: UIScrollView, with view: UIView?, atScale scale: CGFloat) {
print("I just finished zooming!")
}
class ScrollViewController: UIViewController, UIScrollViewDelegate {
var scrollView: UIScrollView!
var imageView: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
imageView = UIImageView(image: UIImage(named: "image.png"))
scrollView = UIScrollView(frame: view.bounds)
scrollView.backgroundColor = UIColor.blackColor()
scrollView.contentSize = imageView.bounds.size
scrollView.autoresizingMask = [UIViewAutoresizing.FlexibleWidth, UIViewAutoresizing.FlexibleHeight]
scrollView.contentOffset = CGPoint(x: 1000, y: 450)
scrollView.addSubview(imageView)
view.addSubview(scrollView)
scrollView.delegate = self
setZoomScale()
setupGestureRecognizer()
}
func viewForZoomingInScrollView(scrollView: UIScrollView) -> UIView? {
return imageView
}
override func viewWillLayoutSubviews() {
setZoomScale()
}
func setZoomScale() {
let imageViewSize = imageView.bounds.size
let scrollViewSize = scrollView.bounds.size
let widthScale = scrollViewSize.width / imageViewSize.width
let heightScale = scrollViewSize.height / imageViewSize.height
scrollView.minimumZoomScale = min(widthScale, heightScale)
scrollView.zoomScale = 1.0
}
func scrollViewDidZoom(scrollView: UIScrollView) {
let imageViewSize = imageView.frame.size
let scrollViewSize = scrollView.bounds.size
let verticalPadding = imageViewSize.height < scrollViewSize.height ? (scrollViewSize.height - imageViewSize.height) / 2 : 0
let horizontalPadding = imageViewSize.width < scrollViewSize.width ? (scrollViewSize.width - imageViewSize.width) / 2 : 0
scrollView.contentInset = UIEdgeInsets(top: verticalPadding, left: horizontalPadding, bottom: verticalPadding, right: horizontalPadding)
}
func scrollViewDidEndZooming(scrollView: UIScrollView, with view: UIView?, atScale scale: CGFloat) {
print("I just finished zooming!")
}
func setupGestureRecognizer() {
let doubleTap = UITapGestureRecognizer(target: self, action: "handleDoubleTap:")
doubleTap.numberOfTapsRequired = 2
scrollView.addGestureRecognizer(doubleTap)
}
func handleDoubleTap(recognizer: UITapGestureRecognizer) {
if (scrollView.zoomScale > scrollView.minimumZoomScale) {
scrollView.setZoomScale(scrollView.minimumZoomScale, animated: true)
} else {
scrollView.setZoomScale(scrollView.maximumZoomScale, animated: true)
}
}
}
类ScrollViewController:UIViewController、UIScrollViewDelegate{
var scrollView:UIScrollView！
var-imageView:UIImageView！
重写func viewDidLoad（）{
super.viewDidLoad（）
imageView=UIImageView（图像：UIImage（名为：“image.png”））
scrollView=UIScrollView（框架：view.bounds）
scrollView.backgroundColor=UIColor.blackColor（）
scrollView.contentSize=imageView.bounds.size
scrollView.autoresizingMask=[UIViewAutoresizing.FlexibleWidth，UIViewAutoresizing.FlexibleHeight]
scrollView.contentOffset=CGPoint（x:1000，y:450）
scrollView.addSubview（imageView）
view.addSubview（滚动视图）
scrollView.delegate=self
setZoomScale（）
SetupGestureRecognitor（）
}
func viewForZoomingInScrollView（滚动视图：UIScrollView）->UIView{
返回图像视图
}
重写func viewWillLayoutSubviews（）{
setZoomScale（）
}
func setZoomScale（）{
让imageViewSize=imageView.bounds.size
让scrollViewSize=scrollView.bounds.size
让widthScale=scrollViewSize.width/imageViewSize.width
设heightScale=scrollViewSize.height/imageViewSize.height
scrollView.minimumZoomScale=min（宽度刻度、高度刻度）
scrollView.zoomScale=1.0
}
func scrollViewDidZoom（scrollView:UIScrollView）{
让imageViewSize=imageView.frame.size
让scrollViewSize=scrollView.bounds.size
让verticalPadding=imageViewSize.heightscrollView.minimumZoomScale）{
scrollView.setZoomScale（scrollView.minimumZoomScale，动画：true）
}否则{
scrollView.setZoomScale（scrollView.maximumZoomScale，动画：true）
}
}
}
你犯了一个小错误。请尝试以下代码：
func scrollViewDidEndZooming(scrollView: UIScrollView, withView view: UIView?, atScale scale: CGFloat) {
print("I just finished zooming!")
}
我不知道正确的术语是什么，它抓住了被代码蒙蔽的感觉，但我忍受了。非常感谢，这很有效！区别是什么？@WilliamEntriken我想，问题是苹果改变了API语法。