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我有一个UIViewController，它只有一个UIView，它覆盖底部1/3的viewController。像这样如何在半屏上显示ViewController
我想提出上其他的ViewController这的viewController。它应该从底部出现动画，并且应该将底部动画消除。
但我不希望它覆盖整个屏幕。它所呈现的viewController应该在后面可见。
这似乎是一个基本问题但我无法完成它。有人能指点我的方向吗？
编辑：
这是我已经试过至今。我已经创建了这些类
// MARK: -
class MyFadeInFadeOutTransitioning: NSObject, UIViewControllerTransitioningDelegate {
var backgroundColorAlpha: CGFloat = 0.5
var shoulDismiss = false
func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
let fadeInPresentAnimationController = MyFadeInPresentAnimationController()
fadeInPresentAnimationController.backgroundColorAlpha = backgroundColorAlpha
return fadeInPresentAnimationController
}
func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
let fadeOutDismissAnimationController = MyFadeOutDismissAnimationController()
return fadeOutDismissAnimationController
}
}
// MARK: -
class MYFadeInPresentAnimationController: NSObject, UIViewControllerAnimatedTransitioning {
let kPresentationDuration = 0.5
var backgroundColorAlpha: CGFloat?
func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
return kPresentationDuration
}
func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
let toViewController = transitionContext.viewController(forKey: UITransitionContextViewControllerKey.to)!
toViewController.view.backgroundColor = UIColor.clear
let toViewFrame = transitionContext.finalFrame(for: toViewController)
let containerView = transitionContext.containerView
if let pickerContainerView = toViewController.view.viewWithTag(kContainerViewTag) {
let transform = CGAffineTransform(translationX: 0.0, y: pickerContainerView.frame.size.height)
pickerContainerView.transform = transform
}
toViewController.view.frame = toViewFrame
containerView.addSubview(toViewController.view)
UIView.animate(withDuration: 0.3, delay: 0.0, options: .curveLinear , animations: {
toViewController.view.backgroundColor = UIColor(white: 0.0, alpha: self.backgroundColorAlpha!)
if let pickerContainerView = toViewController.view.viewWithTag(kContainerViewTag) {
pickerContainerView.transform = CGAffineTransform.identity
}
}) { (finished) in
transitionContext.completeTransition(true)
}
}
}
// MARK: -
class MYFadeOutDismissAnimationController: NSObject, UIViewControllerAnimatedTransitioning {
let kDismissalDuration = 0.15
func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
return kDismissalDuration
}
func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
let fromViewController = transitionContext.viewController(forKey: UITransitionContextViewControllerKey.from)!
let toViewController = transitionContext.viewController(forKey: UITransitionContextViewControllerKey.to)!
let containerView = transitionContext.containerView
containerView.addSubview(toViewController.view)
containerView.sendSubview(toBack: toViewController.view)
UIView.animate(withDuration: kDismissalDuration, delay: 0.0, options: .curveLinear, animations: {
// fromViewController.view.backgroundColor = UIColor.clearColor()
// if let pickerContainerView = toViewController.view.viewWithTag(kContainerViewTag) {
// let transform = CGAffineTransformMakeTranslation(0.0, pickerContainerView.frame.size.height)
// pickerContainerView.transform = transform
// }
fromViewController.view.alpha = 0.0
}) { (finished) in
let canceled: Bool = transitionContext.transitionWasCancelled
transitionContext.completeTransition(true)
if !canceled {
UIApplication.shared.keyWindow?.addSubview(toViewController.view)
}
}
}
}
并在其中正在呈现的viewController，我做如下
var customTransitioningDelegate: MYFadeInFadeOutTransitioning? = MYFadeInFadeOutTransitioning()
init() {
super.init(nibName: "SomeNibName", bundle: Bundle.main)
transitioningDelegate = customTransitioningDelegate
modalPresentationStyle = .custom
customTransitioningDelegate?.backgroundColorAlpha = 0.0
}
它做目前的viewController，我可以看到背景的viewController为好。但我希望它能从动画的底部呈现。并用动画关闭底部。我怎样才能做到这一点 ？
可以显示乌尔试图代码 –
您可以添加视图控制器为孩子 –
@ Anbu.Karthik请立即检查。 –