本介绍UIViewController之间跳转时，通过配置页面动画过渡，把页面跳转动画弄成左到右或者右到左的方法。
代码摘抄自： How to present view controller from right to left in iOS using Swift
创建页面过渡动画类：
class RightToLeftTransition: NSObject, UIViewControllerAnimatedTransitioning {
let duration: TimeInterval = 0.25
func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
return duration
}
func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
let container = transitionContext.containerView
let toView = transitionContext.view(forKey: .to)!
container.addSubview(toView)
toView.frame.origin = CGPoint(x: toView.frame.width, y: 0)
UIView.animate(withDuration: duration, delay: 0, options: .curveEaseOut, animations: {
toView.frame.origin = CGPoint(x: 0, y: 0)
}, completion: {
_ in
transitionContext.completeTransition(true)
})
}
}
class LeftToRightTransition: NSObject, UIViewControllerAnimatedTransitioning {
let duration: TimeInterval = 0.25
func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
return duration
}
func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
let container = transitionContext.containerView
let fromView = transitionContext.view(forKey: .from)!
container.addSubview(fromView)
fromView.frame.origin = .zero
UIView.animate(withDuration: duration, delay: 0, options: .curveEaseIn, animations: {
fromView.frame.origin = CGPoint(x: fromView.frame.width, y: 0)
}, completion: {
_ in
fromView.removeFromSuperview()
transitionContext.completeTransition(true)
})
}
}
在页面跳转前的上个页面 配置下个页面的过渡动画
class ViewController: UIViewController {
var presentTransition: UIViewControllerAnimatedTransitioning?
var dismissTransition: UIViewControllerAnimatedTransitioning?
func jumpToVc(animated: Bool) {
let vc = UIViewController() // 这个是要跳到的viewController
presentTransition = RightToLeftTransition()
dismissTransition = LeftToRightTransition()
vc.modalPresentationStyle = .custom
vc.transitioningDelegate = self
present(vc, animated: true, completion: {
[weak self] in
self?.presentTransition = nil
})
}
}
实现过渡协议，返回配置的动画过渡。
extension ViewController: UIViewControllerTransitioningDelegate {
func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
return presentTransition
}
func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
return dismissTransition
}
}