我有以下2个函数添加和删除从容器视图控制器触发的子视图控制器：
@discardableResult func addChildViewController(withChildViewController childViewController: UIViewController) -> UIViewController {
// Add Child View Controller
addChildViewController(childViewController)
childViewController.beginAppearanceTransition(true,animated: true)
// Add Child View as Subview
view.addSubview(childViewController.view)
// Configure Child View
childViewController.view.frame = view.bounds
childViewController.view.autoresizingMask = [.flexibleWidth,.flexibleHeight]
// Notify Child View Controller
childViewController.didMove(toParentViewController: self)
return childViewController
}
@discardableResult func removeChildViewController(withChildViewController childViewController: UIViewController) -> UIViewController {
// Notify Child View Controller
childViewController.willMove(toParentViewController: nil)
childViewController.beginAppearanceTransition(false,animated: true)
// Remove Child View From Superview
childViewController.view.removeFromSuperview()
// Notify Child View Controller
childViewController.removeFromParentViewController()
return childViewController
}
上面的函数是UIViewController的扩展,所以我所做的只是父视图控制器上的self.addChildViewController()和self.removeChildViewController().
如何在出路时移除视图的动画以及在路上添加的视图？
解决方法
不同子视图控制器之间的动画： –
func cycleFromViewController(oldViewController: UIViewController,toViewController newViewController: UIViewController) {
oldViewController.willMove(toParentViewController: nil)
newViewController.view.translatesAutoresizingMaskIntoConstraints = false
self.addChildViewController(newViewController)
self.addSubview(subView: newViewController.view,toView:self.containerView!)
newViewController.view.alpha = 0
newViewController.view.layoutIfNeeded()
UIView.animate(withDuration: 0.5,delay: 0.1,options: .transitionFlipFromLeft,animations: {
newViewController.view.alpha = 1
oldViewController.view.alpha = 0
}) { (finished) in
oldViewController.view.removeFromSuperview()
oldViewController.removeFromParentViewController()
newViewController.didMove(toParentViewController: self)
}
}
在上面,
> oldViewController： – 当前显示的子viewController
> newViewController： – 将要添加的新子视图控制器
> containerView： – 显示所有子控制器的视图.
要为子视图设置动画,可以根据要求将transitionFlipFromLeft替换为可用的UIViewAnimationoptions,以使用不同类型的动画样式.