Swift - 用CATransform3DMakeRotation实现翻页效果

Swift - 用CATransform3DMakeRotation实现翻页效果

效果

源码

https://github.com/YouXianMing/Swift-Animations

//
//  PageFlipEffectController.swift
//  Swift-Animations
//
//  Created by YouXianMing on 16/8/22.
//  Copyright © 2016年 YouXianMing. All rights reserved.
//

import UIKit

class PageFlipEffectController: NormalTitleViewController {

    private var math  : Math! = Math(pointA: CGPointMake(, ), pointB: CGPointMake(Width(), ))
    private var layer : CALayer!

    override func setup() {

        super.setup()

        let image = UIImage(named: "pic_1")
        let size  = Math.ResetFromSize((image?.size)!, withFixedWidth: Width() / 2.0)

        layer                        = CALayer()
        layer.anchorPoint            = CGPointMake(1.0, 0.5)
        layer.frame                  = CGRectMake(, , Width() / , size.height)
        layer.allowsEdgeAntialiasing = true
        layer.position               = CGPointMake(Width() / , contentView!.middleY)
        layer.contents               = image?.CGImage
        layer.borderColor            = UIColor.blackColor().CGColor
        layer.borderWidth            = 3.0
        layer.masksToBounds          = true
        layer.transform              = CATransform3DMakeRotation(Math.RadianFromDegree(), , , )
        contentView?.layer.addSublayer(layer)

        let panGesture = UIPanGestureRecognizer(target: self, action: #selector(PageFlipEffectController.handlePan))
        view.addGestureRecognizer(panGesture)
    }

    @objc private func handlePan(sender : UIPanGestureRecognizer) {

        let curPoint = sender.locationInView(view)
        let x        = curPoint.x

        // 初始化3D变换,获取默认值
        var perspectiveTransform = CATransform3DIdentity

        // 透视
        perspectiveTransform.m34 = -1.0 / 2000.0

        // 空间旋转
        perspectiveTransform = CATransform3DRotate(perspectiveTransform, Math.RadianFromDegree(x * math.k), , , )
        CATransaction.setDisableActions(true)
        layer.transform = perspectiveTransform

        layer.contents = UIImage(named: x >= Width() / 2.0 ? "pic_2" : "pic_1")?.CGImage

        if sender.state == .Ended {

            // 初始化3D变换,获取默认值
            var perspectiveTransform = CATransform3DIdentity

            // 透视
            perspectiveTransform.m34 = -1.0 / 2000.0

            // 空间旋转
            perspectiveTransform = CATransform3DRotate(perspectiveTransform, Math.RadianFromDegree(x >= Width() / 2.0 ?  : ), , , )

            CATransaction.setDisableActions(false)
            layer.transform = perspectiveTransform
        }
    }
}