大神 请问为什么我在dismiss时，不执行动画而只是计算动画秒数，等动画时间过了，就直接黑屏了~求救
func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
//记录transitionContext
self.transitionContext = transitionContext
//1. 获取容器视图
let containerView = transitionContext.containerView;
//2. 获取toVC & toView
let toVC: UIViewController = transitionContext .viewController(forKey: .to)!
let toView: UIView = transitionContext.view(forKey: .to) ?? toVC.view
//3. 获取fromeVC & fromeView
let fromVC: UIViewController = transitionContext.viewController(forKey: .from)!
let fromView: UIView = transitionContext.view(forKey: .from) ?? fromVC.view
//4. 把fromView & toView 加入容器视图
// containerView.addSubview(fromView)
containerView.addSubview(toView)
//MARK: -------------------- 对外接口的调用 ----------------------
//5. 对containerView的设置
self.containerViewCallBack?(containerView)
//6. 根据是否为present 执行相应的动画
if isPrensent {
self.presentAnimationCallBack?(toVC,toView,fromVC,fromView)
}else{
// self.dismissAnimationCallBack?(toVC,toView,fromVC,fromView)
UIView.animate(withDuration: self.dismissDuration, animations: {
fromView.frame = CGRect(x: 0, y: 200, width: 100, height: 10)
}, completion: { (isCompletion) in
transitionContext.completeTransition(true)
})
}
//7. 完成动画后告诉系统
//在isAccomplish 的setter方法里
}
