前言
在IOS开发中,我们model另外一个控制器的时候,一般都使用默认的转场动画。本文将给大家详细介绍关于iOS Swift控制器转场动画的相关内容，分享出来供大家参考学习，下面话不多说了，来一起看看详细的介绍吧。
返回效果也可更改
四种转场动画
1. move：源图片位置移动到目标图片位置；
2. circle：根据源控件大小创建圆形或者椭圆形path路径，放大展示目标；
3. tier：源左右，目标由小到大缩放；
4. middle：源的中心点开始放大，返回是缩回到中心。
代码解析
给UIViewController添加一个属性yy_routerAnimation: YYTransition
extension UIViewController {
public var yy_routerAnimation : YYTransition {
set {
objc_setAssociatedObject(self, &YYTransitionKey.kRouterAnimationKey, newValue, .OBJC_ASSOCIATION_RETAIN_NONATOMIC)
}
get {
guard let r = objc_getAssociatedObject(self, &YYTransitionKey.kRouterAnimationKey) as? YYTransition else {
return YYTransition()
}
return r
}
}
}
YYTransition类
public class YYTransition: NSObject
遵守代理
extension YYTransition: UIViewControllerAnimatedTransitioning, UIViewControllerTransitioningDelegate, UINavigationControllerDelegate
实现代理方法
return self
}
public func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
return 转场动画所需时间
}
这个方法内调用相应动画方法
public func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
switch self.yy_ransitionAnimationType {
case .circle:
break
case .move:
break
case .middle:
break
case .tier:
break
}
}
相关属性
extension YYTransition {
// 是push还是pop
public var yy_isBack: Bool {}
// 动画类型
var yy_ransitionAnimationType: YYTransitionAnimationType {}
// 源view名字
var yy_fromViewPath: String? { }
// 目标view名字
var yy_toViewPath: String? { }
// 句柄
var yy_transitionContext: UIViewControllerContextTransitioning {}
}
实现基础动画结束时的代理方法
extension YYTransition: CAAnimationDelegate {
public func animationDidStop(_ anim: CAAnimation, finished flag: Bool) {
yy_transitionContext.completeTransition(!yy_transitionContext.transitionWasCancelled)
yy_transitionContext.viewController(forKey: .from)?.view.layer.mask = nil
yy_transitionContext.viewController(forKey: .to)?.view.layer.mask = nil
}
}
基础动画对路径操作的动画
extension YYTransition {
func maskAnimation(targetVC: UIViewController, startPath: UIBezierPath, endPath: UIBezierPath, context: UIViewControllerContextTransitioning) {
}
下面四个文件内实现相对应的动画
YYTransition+Circle YYTransition+Move YYTransition+Tier YYTransition+Middle
动画实现的思想基本就是拿到源view和目标view，控制位置和大小，做相应的动画即可。
用到的方法
UIViewControllerContextTransitioning 调用 public func viewController(forKey key: UITransitionContextViewControllerKey) -> UIViewController? UIViewController调用 open func value(forKeyPath keyPath: String) -> Any? * When requesting a snapshot, 'afterUpdates' defines whether the snapshot is representative of what's currently on screen or if you wish to include any recent changes before taking the snapshot. open func snapshotView(afterScreenUpdates afterUpdates: Bool) -> UIView? open func convert(_ rect: CGRect, from view: UIView?) -> CGRect open func insertSubview(_ view: UIView, belowSubview siblingSubview: UIView) // This must be called whenever a transition completes (or is cancelled.) // Typically this is called by the object conforming to the // UIViewControllerAnimatedTransitioning protocol that was vended by the transitioning // delegate. For purely interactive transitions it should be called by the // interaction controller. This method effectively updates internal view // controller state at the end of the transition. public func completeTransition(_ didComplete: Bool)
具体代码在YE项目地址中YYTransition动态库中
eg在YYSourceTransitionViewController和YYTargetTransitionViewController中可以看到。
以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作具有一定的参考学习价值，如果有疑问大家可以留言交流，谢谢大家对脚本之家的支持。
