如何在Swift中调用UIViewController的transitionFromViewController？

Question

我应该如何使用Swift实现此方法调用？

[containerViewController transitionFromViewController:fromViewController
                                         toViewController:toViewController
                                                 duration:0.2
                                                  options:UIViewAnimationOptionTransitionCrossDissolve
                                               animations:nil
                                               completion:^(BOOL finished) {
                                                   [fromViewController removeFromParentViewController];
                                                   [toViewController didMoveToParentViewController:containerViewController];
                                                   toViewController.view.frame = containerViewController.view.bounds;
                                               }];

====

    containerViewController.transitionFromViewController(
        fromViewController,
        toViewController,
        0.2,
        UIViewAnimationOptionTransitionCrossDissolve,
        nil,
        nil)

我收到此错误：使用未解析的标识符'UIViewAnimationOptionTransitionCrossDissolve'

Answer 1

工作解决方案：

containerViewController.transitionFromViewController(
            fromViewController,
            toViewController: toViewController,
            duration: 0.2,
            options: UIViewAnimationOptions.TransitionCrossDissolve,
            nil,
            completion: { finished in
                fromViewController.removeFromParentViewController()
                toViewController.didMoveToParentViewController(containerViewController)
                toViewController.view.frame = containerViewController.view.bounds
            })

Answer 2

写.TransitionCrossDissolve代替UIViewAnimationOptionTransitionCrossDissolve。类型UIViewAnimationOption是已知的方法，可以推断出来。

Answer 3

斯威夫特3：

containerViewController.transition(from: fromViewController,
                                   to: toViewController,
                                   duration: 0.2,
                                   options: .transitionCrossDissolve,
                                   nil,
                                   completion: { _ in
                                    fromViewController.removeFromParentViewController()
                                    toViewController.didMove(toParentViewController: containerViewController)
                                    toViewController.view.frame = containerViewController.view.bounds
})