Question

如何用swift实现自定义页面间的切换动画

Answer 1

先实现页面之间切换的Controller

import UIKit

class CustomAnimationController: NSObject, UIViewControllerAnimatedTransitioning {
func transitionDuration(transitionContext: UIViewControllerContextTransitioning) -> NSTimeInterval {
return 0.5
}

func animateTransition(transitionContext: UIViewControllerContextTransitioning) {
let toViewController = transitionContext.viewControllerForKey(UITransitionContextToViewControllerKey)
let fromViewController = transitionContext.viewControllerForKey(UITransitionContextFromViewControllerKey)
let finalFrame = transitionContext.finalFrameForViewController(toViewController!)

let containerView = transitionContext.containerView()

let screenBounds = UIScreen.mainScreen().bounds
toViewController?.view.frame = CGRectOffset(finalFrame, 0, screenBounds.size.height)

let toViewView = toViewController?.view
containerView.addSubview(toViewView!)

//动画
let duration = self.transitionDuration(transitionContext)

UIView.animateWithDuration(duration, animations: {
fromViewController?.view.alpha = 0.5
toViewController?.view.frame = finalFrame
}, completion: {(Bool finished) in
fromViewController?.view.alpha = 1.0
transitionContext.completeTransition(true)
})

}
}
在view controller的class里添加delegate

class FirstViewController: UIViewController,UIViewControllerTransitioningDelegate
添加一个属性

var customAnimationController:CustomAnimationController
初始化

required init(coder aDecoder: NSCoder) {
customAnimationController = CustomAnimationController()
super.init(coder: aDecoder)
}
在切换页面前segue里指定delegate为self

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
//
if segue.identifier == "ShowAuthor" {
let toVC = segue.destinationViewController as UIViewController
toVC.transitioningDelegate = self
}
}
实现delegate

//MARK: TransitionDelegate
func animationControllerForPresentedController(presented: UIViewController, presentingController presenting: UIViewController, sourceController source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
return customAnimationController
}