如何在UISearchController演示/解雇动画旁边制作动画？

问题描述

我在 tableHeaderView 中有一个带有搜索栏的表格视图，由 UISearchController 管理。我使用标准的 UISearchController 演示动画。

I have a table view with a search bar in the tableHeaderView, managed by a UISearchController. I use the standard UISearchController presentation animation.

我想为与searchBar动画具有相同持续时间的另一个视图设置动画。我尝试了各种持续时间值但是它们在任何时候都不完全匹配。

I want to animate another view with the same duration as the searchBar animation. I tried various duration values but alas they don't match perfectly at all times.

所以我认为使用会很棒 - [UIViewControllerTransitionCoordinator animateAlongsideTransition：完成：] API。

So I thought it would be great to make use of the -[UIViewControllerTransitionCoordinator animateAlongsideTransition:completion:] API.

不幸的是我找不到的引用< UIViewControllerTransitionCoordinator> 对象。具体来说， searchController.presentingViewController.transitionCoordinator 是 nil 。

Unfortunately I can't find a reference of the <UIViewControllerTransitionCoordinator> object. Specifically, searchController.presentingViewController.transitionCoordinator is nil.

推荐答案

我遇到了同样的问题，我需要在 UISearchController 的演示文稿旁边制作其他视图的动画。在显示搜索控制器的调用后， transitionCoordinator 变为可用，您可以添加代码来为您的视图设置动画

I had the same problem, I needed to animate other views alongside the the presentation of the UISearchController; After the call to present the search controller the transitionCoordinator becomes available and you can add code to animate your views

演示：

func search() {
    let searchController = UISearchController(searchResultsController: resultsController)
    // Configure search controller
    self.present(searchController, animated: true) {}

    self.transitionCoordinator?.animate(alongsideTransition: { (context) in
        // animate other views
    }, completion: nil)
}

我还必须在解雇搜索控制器时动画视图，在这种情况下，我实现 UISearchControllerDelegate 的 willDismissSearchController 方法， transitionCoordinator 在此方法中无法立即使用，但进行异步调用可以解决这个问题

I also had to animate the views while dismissing the search controller, in this case I implement the willDismissSearchController method of the UISearchControllerDelegate, the transitionCoordinator is not immediately available in this method but making an asynchronous call does the trick

解散：

func willDismissSearchController(_ searchController: UISearchController) {
    DispatchQueue.main.async {
        searchController.transitionCoordinator?.animate(alongsideTransition: { (context) in
            // animate views
        }, completion: nil)
    }
}

这适用于iOS 9

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