swift-商品加入购物车动画

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// MARK: - 商品图片抛入购物车的动画效果 extension QHGoodListViewController {    /**    开始动画     - parameter rect: 商品图标对象的frame     - parameter iconView: 商品图标对象    */        private func startAnimation(rect: CGRect, iconView:UIImageView) {                if layer == nil {            layer = CALayer()            layer?.contents = iconView.layer.contents            layer?.contentsGravity = kCAGravityResizeAspectFill            layer?.bounds = rect            layer?.cornerRadius = CGRectGetHeight(layer!.bounds)*0.5            layer?.masksToBounds = true            layer?.position = CGPoint(x: iconView.center.x, y: CGRectGetMinY(rect)+96)                UIApplication.sharedApplication().keyWindow?.layer.addSublayer(layer!)            path = UIBezierPath()            path!.moveToPoint(layer!.position)            path?.addQuadCurveToPoint(CGPoint(x: SCREEN_WIDTH - 25, y: 35), controlPoint: CGPoint(x: SCREEN_WIDTH*0.5, y: rect.origin.y - 80))        }                // 组动画        groupAnimation()    }        // 组动画 帧动画抛入购物车 并放大、缩小图层增加点动效    private func groupAnimation() {                // 开始动画禁用tableView交互         tableView.userInteractionEnabled = false                // 帧动画        let animation = CAKeyframeAnimation(keyPath: "position")        animation.path = path!.CGPath        animation.rotationMode = kCAAnimationRotateAuto                // 放大动画         let bigAnimation = CABasicAnimation(keyPath: "transform.scale")        bigAnimation.duration = 0.5        bigAnimation.fromValue = 1        bigAnimation.toValue = 2        bigAnimation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseIn)                // 缩小动画        let smallAnimation = CABasicAnimation(keyPath: "transform.scale")        smallAnimation.beginTime = 0.5        smallAnimation.duration = 1.5        smallAnimation.fromValue = 2        smallAnimation.toValue = 0.3        smallAnimation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseOut)                // 组动画        let groupAnimation = CAAnimationGroup()        groupAnimation.animations = [animation, bigAnimation, smallAnimation]        groupAnimation.duration = 2        groupAnimation.removedOnCompletion = false        groupAnimation.fillMode = kCAFillModeForwards        groupAnimation.delegate = self        layer?.addAnimation(groupAnimation, forKey: "groupAnimation")    }        // 动画结束后做一些操作     override func animationDidStop(anim: CAAnimation, finished flag: Bool) {                // 如果动画是我们的组动画 才开始一些操作         if anim == layer?.animationForKey("groupAnimation") {                        // 开启交互             tableView.userInteractionEnabled = true                        // 隐藏图层             layer?.removeAllAnimations()            layer?.removeFromSuperlayer()            layer = nil                        // 如果商品数大于0 显示购物车里地商品数量             if self.addGoodArray.count > 0 {                addCountLabel.hidden = false            }                        // 商品数量渐出             let goodCountAnimation = CATransition()            goodCountAnimation.duration = 0.25            addCountLabel.text = "\(self.addGoodArray.count)"            addCountLabel.layer.addAnimation(goodCountAnimation, forKey: nil)                        //购物车颤抖             let cartAnimation = CABasicAnimation(keyPath: "transform.translation.y")            cartAnimation.duration = 0.25            cartAnimation.fromValue = -5            cartAnimation.toValue = 5            cartAnimation.autoreverses = true            cartButton.layer.addAnimation(cartAnimation, forKey: nil)        }    }        }
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