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iOSswift實(shí)現(xiàn)轉(zhuǎn)場動畫的方法示例
轉(zhuǎn)場動畫介紹
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轉(zhuǎn)場動畫在我們?nèi)粘ｉ_發(fā)中是經(jīng)常遇到的，所謂轉(zhuǎn)場動畫，就是一個(gè)控制器的view切到另一個(gè)控制器的view上過程中過的動畫效果。本例子是實(shí)現(xiàn)了在導(dǎo)航控制器的titleView邊上慢慢彈出一個(gè)控制器。下面話不多說，來一起看看詳細(xì)的介紹：
效果圖：
專場前
專場后
示例代碼
首先自定義一個(gè)animator類。在需要轉(zhuǎn)場的控制器內(nèi)，設(shè)置代理
//需要設(shè)置轉(zhuǎn)場動畫的控制器titleViewVc.transitioningDelegate = aniamator//這里的animator是animator的實(shí)例
下面是animator類中的代碼
class animatorTool: NSObject {
lazy var isPresent = false
var callBack : ((isPresented:Bool)->())?//向外界傳遞動畫是否正在顯示
init(callBack : ((isPresented:Bool)->())) {
self.callBack = callBack
}//自定義構(gòu)造方法，便于給閉包賦值
}
extension animatorTool:UIViewControllerTransitioningDelegate{
func presentationControllerForPresentedViewController(presented: UIViewController, presentingViewController presenting: UIViewController, sourceViewController source: UIViewController) -> UIPresentationController? {
return AWYPresentationController(presentedViewController: presented, presentingViewController: presenting)//AWYPresentationController是自定義繼承自UIPresentationController的類，是為了設(shè)置modal出來的vc的view的大小
}
func animationControllerForPresentedController(presented: UIViewController, presentingController presenting: UIViewController, sourceController source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
isPresent = true
self.callBack!(isPresented: isPresent)
return self
}
func animationControllerForDismissedController(dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
isPresent = false
self.callBack!(isPresented: isPresent)
return self
}
}
extension animatorTool:UIViewControllerAnimatedTransitioning{
func transitionDuration(transitionContext: UIViewControllerContextTransitioning?) -> NSTimeInterval {
return 0.5//動畫時(shí)長
}
func animateTransition(transitionContext: UIViewControllerContextTransitioning) {
isPresent ?animatetransitionForPresented(transitionContext) : animatetransitionForDismissed(transitionContext)
}
func animatetransitionForPresented(transitonContext:UIViewControllerContextTransitioning){
let aimView = transitonContext.viewForKey(UITransitionContextToViewKey)!
transitonContext.containerView()?.addSubview(aimView)
aimView.transform = CGAffineTransformMakeScale(1.0, 0.0)
UIView.animateWithDuration(transitionDuration(transitonContext), animations: {
aimView.layer.anchorPoint = CGPointMake(0.5, 0.0)
aimView.transform = CGAffineTransformIdentity
}) { (_) in
transitonContext.completeTransition(true)
}
}
func animatetransitionForDismissed(transitonContext:UIViewControllerContextTransitioning){
let aimView = transitonContext.viewForKey(UITransitionContextFromViewKey)!
transitonContext.containerView()?.addSubview(aimView)
UIView.animateWithDuration(transitionDuration(transitonContext), animations: {
aimView.layer.anchorPoint = CGPointMake(0.5, 0.0)
aimView.transform = CGAffineTransformMakeScale(1.0, 0.001)//留一點(diǎn)值，這樣會有動畫效果
}) { (_) in
transitonContext.completeTransition(true)
}
}
}總結(jié)
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新聞名稱：iOSswift實(shí)現(xiàn)轉(zhuǎn)場動畫的方法示例
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