Я следую этому удивительному видео, чтобы создать настраиваемый переход для моего проекта, потому что я разрабатываю iPad, поэтому вместо этого представления полного экрана контроллера точки назначения, я хочу, чтобы он занимал половину экрана следующим образом:
Мой код настраиваемого класса перехода:
class CircularTransition: NSObject {
var circle = UIView()
var startingPoint = CGPoint.zero {
didSet {
circle.center = startingPoint
}
}
var circleColor = UIColor.white
var duration = 0.4
enum circularTransitionMode: Int {
case present, dismiss
}
var transitionMode = circularTransitionMode.present
}
extension CircularTransition: UIViewControllerAnimatedTransitioning {
func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
return duration
}
func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
let containerView = transitionContext.containerView
if transitionMode == .present {
if let presentedView = transitionContext.view(forKey: UITransitionContextViewKey.to) {
var viewCenter = presentedView.center
var viewSize = presentedView.frame.size
if UIDevice.current.userInterfaceIdiom == .pad {
viewCenter = CGPoint(x: viewCenter.x, y: viewSize.height)
viewSize = CGSize(width: viewSize.width, height: viewSize.height)
}
circle = UIView()
circle.frame = frameForCircle(withViewCenter: viewCenter, size: viewSize, startPoint: startingPoint)
circle.layer.cornerRadius = circle.frame.size.width / 2
circle.center = startingPoint
circle.backgroundColor = circleColor
circle.transform = CGAffineTransform(scaleX: 0.001, y: 0.001)
containerView.addSubview(circle)
presentedView.center = startingPoint
presentedView.transform = CGAffineTransform(scaleX: 0.001, y: 0.001)
presentedView.alpha = 0
containerView.addSubview(presentedView)
UIView.animate(withDuration: duration, animations: {
self.circle.transform = CGAffineTransform.identity
presentedView.transform = CGAffineTransform.identity
presentedView.alpha = 1
presentedView.center = viewCenter
}, completion: {(sucess: Bool) in transitionContext.completeTransition(sucess)})
}
} else {
if let returningView = transitionContext.view(forKey: UITransitionContextViewKey.from) {
let viewCenter = returningView.center
let viewSize = returningView.frame.size
circle.frame = frameForCircle(withViewCenter: viewCenter, size: viewSize, startPoint: startingPoint)
circle.layer.cornerRadius = circle.frame.size.width / 2
circle.center = startingPoint
UIView.animate(withDuration: duration + 0.1, animations: {
self.circle.transform = CGAffineTransform(scaleX: 0.001, y: 0.001)
returningView.transform = CGAffineTransform(scaleX: 0.001, y: 0.001)
returningView.center = self.startingPoint
returningView.alpha = 0
}, completion: {(success: Bool) in
returningView.center = viewCenter
returningView.removeFromSuperview()
self.circle.removeFromSuperview()
transitionContext.completeTransition(success)
})
}
}
}
func frameForCircle(withViewCenter viewCenter: CGPoint, size viewSize: CGSize, startPoint: CGPoint) -> CGRect {
let xLength = fmax(startingPoint.x, viewSize.width - startingPoint.x)
let yLength = fmax(startingPoint.y, viewSize.height - startingPoint.y)
let offsetVector = sqrt(xLength * xLength + yLength * yLength) * 2
let size = CGSize(width: offsetVector, height: offsetVector)
return CGRect(origin: CGPoint.zero, size: size)
}
}
И часть кода в моем контроллере просмотра:
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let secondVC = segue.destination as! ResultViewController
secondVC.transitioningDelegate = self
secondVC.modalPresentationStyle = .custom
}
// MARK: - Animation
func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
transtion.transitionMode = .dismiss
transtion.startingPoint = calculateButton.center
transtion.circleColor = calculateButton.backgroundColor!
return transtion
}
func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
transtion.transitionMode = .present
transtion.startingPoint = calculateButton.center
transtion.circleColor = calculateButton.backgroundColor!
return transtion
}
Но контроллер отображает полный экран.
