Ios pageCurl动画与触摸交互

我正在寻找一种方法来指示

UIView

上与触摸交互的页面卷曲动画（开始/移动/结束）

注:

我不能使用UIPageController。动画应应用于

ui视图

动画与触摸开始、触摸运动和触摸结束之间的交互非常重要。和视频一模一样

示例代码，但不适用于触摸屏：

override func viewDidLoad() {
    super.viewDidLoad()

    // Do any additional setup after loading the view.

    BackBtn.layer.cornerRadius = 5.0

    AnimationBtn.layer.cornerRadius = 5.0

    transition.delegate = self
    transition.duration = 1.5
    transition.startProgress = 0
    transition.endProgress = 1
    transition.type = CATransitionType(string: "pageCurl") as String
    transition.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
    transition.fillMode = kCAFillModeBoth
    transition.isRemovedOnCompletion = false
}

联系方式：

override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {

    super.touchesMoved(touches, with: event)

    if let touch = touches.first {

        let endPosition = touch.location(in: touch.view)

        differenceX = startPosition.x - endPosition.x

        differenceY = endPosition.y - startPosition.y

        transition.subtype = kCATransitionFromRight

        touch.view!.layer.add(transition, forKey: kCATransition)

        webView.scrollView.contentOffset = CGPoint(x: nextPage + differenceX, y: 0)
   }
}

override func touchesMoved（touch:Set，带有事件：UIEvent？）{
super.touchesMoved（touches，with:event）
如果让触摸=先触摸{
让endPosition=touch.location（在：touch.view中）
差分x=起始位置.x-结束位置.x
差分y=结束位置.y-开始位置.y
transition.subtype=kCATransitionFromRight
touch.view！.layer.add（转换，forKey:kCATransition）
webView.scrollView.contentOffset=CGPoint（x:nextPage+differenceX，y:0）
}
}

我找到了答案。我只需要更改

转换.startProgress

和

转换.endProgress

示例代码：

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    super.touchesBegan(touches, with: event)

    calculatePageCount()

    if let touch = touches.first {

        startPosition = touch.location(in: self.view)

        endPosition = startPosition

        previousPositionX = startPosition.x

        print("start x: \(startPosition.x), start y: \(startPosition.y)")

        transition.startProgress = 0.0

        if index == 0 && startPosition.x > (screenWidth / 2) {

            transition.endProgress = 1.0 - Float(startPosition.x / screenWidth)
            transition.subtype = kCATransitionFromRight

            self.view.layer.add(transition, forKey: kCATransition)
        } else if index != 0 {
            if index != (pageCounter - 1) && startPosition.x > (screenWidth / 2) {
                if self.view.layer.animationKeys() != nil {
                    self.view.layer.removeAllAnimations()
                }

                transition.endProgress = 1.0 - Float(startPosition.x / screenWidth)
                transition.subtype = kCATransitionFromRight
                self.view.layer.add(transition, forKey: kCATransition)
            } else if startPosition.x < (screenWidth / 2) {
                if self.view.layer.animationKeys() != nil {
                    self.view.layer.removeAllAnimations()
                }

                transition.endProgress = Float(startPosition.x / screenWidth)
                transition.subtype = kCATransitionFromLeft
                self.view.layer.add(transition, forKey: kCATransition)
            } else {
                if self.view.layer.animationKeys() != nil {
                    self.view.layer.removeAllAnimations()
                }
            }
        } else {
            if self.view.layer.animationKeys() != nil {
                self.view.layer.removeAllAnimations()
            }
        }
    }
}

override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
    super.touchesMoved(touches, with: event)

    if let touch = touches.first {

        endPosition = touch.location(in: touch.view)

        print("end x: \(endPosition.x), end y: \(endPosition.y)")

        differenceX = startPosition.x - endPosition.x

        differenceY = endPosition.y - startPosition.y

        let differencePosition = endPosition.x - previousPositionX

        previousPositionX = endPosition.x

        print("difference x: \(differenceX)")

        if self.view.layer.animationKeys() != nil {

            transition.startProgress = transition.endProgress

            if differenceX > 0 {

                differencePosition < 0 ? (transition.endProgress = transition.endProgress + Float((abs(differencePosition) / screenWidth))) : (transition.endProgress = transition.endProgress - Float((abs(differencePosition) / screenWidth)))

                self.view.layer.removeAllAnimations()
                self.view.layer.add(transition, forKey: kCATransition)
            } else {

                differencePosition > 0 ? (transition.endProgress = transition.endProgress + Float((abs(differencePosition) / screenWidth))) : (transition.endProgress = transition.endProgress - Float((abs(differencePosition) / screenWidth)))

                self.view.layer.removeAllAnimations()
                self.view.layer.add(transition, forKey: kCATransition)
            }
        }
    }
}

override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
    super.touchesEnded(touches, with: event)

    print("touch ended")

    if self.view.layer.animationKeys() != nil {

        if startPosition.x == endPosition.x {

            transition.startProgress = transition.endProgress
            transition.endProgress = 0

            self.view.layer.removeAllAnimations()
            self.view.layer.add(transition, forKey: kCATransition)
        } else {

            if differenceX > 0 {

                if differenceX > (screenWidth / 2) {

                    if index < (pageCounter - 1) {
                        index += 1
                    }
                    transition.startProgress = transition.endProgress
                    transition.endProgress = 1

                    self.view.layer.removeAllAnimations()
                    self.view.layer.add(transition, forKey: kCATransition)
                } else {
                    transition.endProgress = 0

                    self.view.layer.removeAllAnimations()
                    self.view.layer.add(transition, forKey: kCATransition)
                }
            } else {

                if abs(differenceX) > (screenWidth / 2) {
                    if index > 0 {
                        index -= 1

                        transition.startProgress = transition.endProgress
                        transition.endProgress = 1

                        self.view.layer.removeAllAnimations()
                        self.view.layer.add(transition, forKey: kCATransition)
                    } else {
                        transition.endProgress = 0

                        self.view.layer.removeAllAnimations()
                        self.view.layer.add(transition, forKey: kCATransition)
                    }
                } else {

                    transition.endProgress = 0

                    self.view.layer.removeAllAnimations()
                    self.view.layer.add(transition, forKey: kCATransition)
                }
            }
        }
    }
    nextPage = CGFloat(index) * webView.scrollView.bounds.size.width
    webView.scrollView.contentOffset = CGPoint(x: nextPage, y: 0)
}

func calculatePageCount() {

    pageCounter = Int((webView.scrollView.contentSize.width / webView.scrollView.bounds.size.width).rounded())
}

override func touchsbegind（touch:Set，带有事件：UIEvent？）{
super.touchesbeated（touches，with:event）
calculatePageCount（）
如果让触摸=先触摸{
startPosition=touch.location（在：self.view中）
结束位置=开始位置
previousPositionX=startPosition.x
打印（“开始x:\（startPosition.x），开始y:\（startPosition.y）”）
transition.startProgress=0.0
如果索引==0&&startPosition.x>（屏幕宽度/2）{
transition.endProgress=1.0-浮动（startPosition.x/屏幕宽度）
transition.subtype=kCATransitionFromRight
self.view.layer.add（transition，forKey:kCATransition）
}否则，如果索引！=0{
如果索引！=（pageCounter-1）和&startPosition.x>（屏幕宽度/2）{
如果self.view.layer.animationKeys（）！=nil{
self.view.layer.RemoveAllianimations（）
}
transition.endProgress=1.0-浮动（startPosition.x/屏幕宽度）
transition.subtype=kCATransitionFromRight
self.view.layer.add（transition，forKey:kCATransition）
}如果startPosition.x<（屏幕宽度/2），则为else{
如果self.view.layer.animationKeys（）！=nil{
self.view.layer.RemoveAllianimations（）
}
transition.endProgress=Float（startPosition.x/屏幕宽度）
transition.subtype=kCATransitionFromLeft
self.view.layer.add（transition，forKey:kCATransition）
}否则{
如果self.view.layer.animationKeys（）！=nil{
self.view.layer.RemoveAllianimations（）
}
}
}否则{
如果self.view.layer.animationKeys（）！=nil{
self.view.layer.RemoveAllianimations（）
}
}
}
}
覆盖功能触摸移动（touchs:Set，带有事件：UIEvent？）{
super.touchesMoved（touches，with:event）
如果让触摸=先触摸{
endPosition=touch.location（在：touch.view中）
打印（“结束x:\（endPosition.x），结束y:\（endPosition.y）”）
差分x=起始位置.x-结束位置.x
差分y=结束位置.y-开始位置.y
让differencePosition=endPosition.x-previousPositionX
previousPositionX=endPosition.x
打印（“差异x:\（差异x）”）
如果self.view.layer.animationKeys（）！=nil{
transition.startProgress=transition.endProgress
如果差值x>0{
差异位置<0？（transition.endProgress=transition.endProgress+Float（（abs（差异位置）/屏幕宽度））：（transition.endProgress=transition.endProgress-Float（（abs（差异位置）/屏幕宽度）））
self.view.layer.RemoveAllianimations（）
self.view.layer.add（transition，forKey:kCATransition）
}否则{
differencePosition>0？（transition.endProgress=transition.endProgress+Float（（abs（differencePosition）/screenWidth））：（transition.endProgress=transition.endProgress-Float（（abs（differencePosition）/screenWidth）））
self.view.layer.RemoveAllianimations（）
self.view.layer.add（transition，forKey:kCATransition）
}
}
}
}
覆盖函数touchesend（touchs:Set，带有事件：UIEvent？）{
super.touchesend（触摸，带有：事件）
打印（“触摸结束”）
如果self.view.layer.animationKeys（）！=nil{
如果startPosition.x==endPosition.x{
transition.startProgress=transition.endProgress
transition.endProgress=0
self.view.layer.RemoveAllianimations（）
self.view.layer.add（transition，forKey:kCATransition）
}否则{
如果差值x>0{
如果差异X>（屏幕宽度/2）{
如果索引<（分页计数器-1）{
指数+=1
}
transition.startProgress=transition.endProgress
transition.endProgress=1
self.view.layer.RemoveAllianimations（）
self.view.layer.add（transition，forKey:kCATransition）
}否则{
transition.endProgress=0
self.view.layer.RemoveAllianimations（）
self.view.layer.add（transition，forKey:kCATransition）
}
}否则{
如果abs（差异x）>（屏幕宽度/2）{
如果索引>0{
索引-=1
transition.startProgress=transition.endProgress
transition.endProgress=1
self.view.layer.removeAllAnimatio