So, after attempting to use a custom transition, I always get the Signal SIGABRT error. I tried to switch the segue to a "show" segue, and suddenly, it starts working. Here's the code it points to.
class AppDelegate: UIResponder, UIApplicationDelegate {
For some reason, I cannot find an error code either. But anyway, here's the code in the transition.
let transition = CircularTransition()
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let SecondView = segue.destination as! SecondView
SecondView.transitioningDelegate = self
SecondView.modalPresentationStyle = .custom
}
func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
transition.transitionMode = .dismiss
transition.startingPoint = menuButton.center
transition.circleColor = menuButton.backgroundColor!
return transition
I think it's a problem with the segue or the references.
If you need more details on the "CircularTransition", here's the code. It might be a problem here, too.
import UIKit
class CircularTransition: NSObject {
var circle = UIView()
var startingPoint = CGPoint.zero {
didSet {
circle.center = startingPoint
}
}
var circleColor = UIColor.white
var duration = 0.3
enum CircularTransitionMode:Int {
case present, dismiss, pop
}
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) {
let viewCenter = presentedView.center
let viewSize = presentedView.frame.size
circle = UIView()
circle.frame = frameForCircle(withViewCenter: viewCenter, size: viewSize, startpoint: startingPoint)
circle.layer.cornerRadius = circle.frame.size.height / 2
circle.center = startingPoint
circle.backgroundColor = circleColor
circle.transform = CGAffineTransform(scaleX: 0.001, y: 0.001)
containerView.addSubview(presentedView)
UIView.animate(withDuration: duration, animations: {
self.circle.transform = CGAffineTransform.identity
presentedView.transform = CGAffineTransform.identity
presentedView.alpha = 1
presentedView.center = viewCenter
}, completion: {(success:Bool) in
transitionContext.completeTransition(success)
})
}
}else{
let transitionModeKey = (transitionMode == .pop) ? UITransitionContextViewKey.to : UITransitionContextViewKey.from
if let returningView = transitionContext.view(forKey: transitionModeKey) {
let viewCenter = returningView.center
let viewSize = returningView.frame.size
circle.frame = frameForCircle(withViewCenter: viewCenter, size: viewSize, startpoint: startingPoint)
circle.center = startingPoint
UIView.animate(withDuration: duration, 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
if self.transitionMode == .pop {
containerView.insertSubview(returningView, belowSubview: returningView)
containerView.insertSubview(self.circle, belowSubview: returningView)
}
}, 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(startpoint.x, viewSize.width - startpoint.x)
let yLength = fmax(startpoint.y, viewSize.height - startpoint.y)
let offsetVector = sqrt(xLength * xLength + yLength * yLength) * 2
let size = CGSize(width: offsetVector, height: offsetVector)
return CGRect(origin: CGPoint.zero, size: size)
}
}
