以编程方式切换Cocoa Touch中的视图

let newView = UIView()
newView.frame = oldView.frame
newView.backgroundColor = .red

UIView.transition(with: oldView, duration: 0.5, options: .transitionFlipFromLeft, animations: {
    oldView.removeFromSuperview()
    self.view.addSubview(newView)
}, completion: nil)

let newViewController = UIViewController()
newViewController.view.backgroundColor = .red

let transitionOptions: UIView.AnimationOptions = [.transitionFlipFromLeft, .showHideTransitionViews]

self.transition(from: oldViewController, to: newViewController, duration: 0.5, options: transitionOptions) { _ in
    // completion block
}

let newViewController = UIViewController()
newViewController.view.backgroundColor = .red

self.navigationController?.pushViewController(newViewController, animated: true)