小编Nic*_*ohn的帖子

我已经实现了一个导航控制器,以结合旋转盘类型的布局(想象每个VC布局成一个圆圈,整体旋转,顺序进入视图.导航控制器配置为使用自定义过渡类,如下所示: -

import UIKit

class RotaryTransition: NSObject, UIViewControllerAnimatedTransitioning {
    let isPresenting :Bool
    let duration :TimeInterval = 0.5
    let animationDuration: TimeInterval = 0.7
    let delay: TimeInterval = 0
    let damping: CGFloat = 1.4
    let spring: CGFloat = 6.0

    init(isPresenting: Bool) {
        self.isPresenting = isPresenting
        super.init()
    }

    func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
        //Get references to the view hierarchy
        let fromViewController: UIViewController = transitionContext.viewController(forKey: UITransitionContextViewControllerKey.from)!
        let toViewController: UIViewController = transitionContext.viewController(forKey: UITransitionContextViewControllerKey.to)!
        let sourceRect: CGRect = transitionContext.initialFrame(for: fromViewController)
        let containerView: UIView = transitionContext.containerView

        if …