如何从自定义视图转换到AVPlayerViewController？
如何从自定义视图转换到AVPlayerViewController？
提问于 2018-05-17 08:00:53
我有一个自定义视图：
class MediaPlayerView: UIView {
var mediaURL: URL? {
didSet {
determineMediaType()
}
}
let videoExtensions = ["mov"]
override init (frame : CGRect) {
super.init(frame : frame)
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
func determineMediaType() {
let url = self.mediaURL
let pathExtention = url?.pathExtension
if videoExtensions.contains(pathExtention!) {
print("Movie URL: \(String(describing: url))")
setupVideo(url: url!)
} else {
print("Image URL: \(String(describing: url))")
setupImage(url: url!)
}
}
func setupVideo(url: URL) {
let playButton = UIImage(named: "Play Triangle")
let playButtonView = UIImageView(image: playButton!)
let singleTap = UITapGestureRecognizer(target: self, action: #selector(tapDetected))
playButtonView.addGestureRecognizer(singleTap)
playButtonView.center = self.center
playButtonView.frame.size.width = self.frame.size.width/5
playButtonView.frame.size.height = self.frame.size.height/5
playButtonView.autoresizingMask = [.flexibleWidth,.flexibleHeight]
playButtonView.isUserInteractionEnabled = true
self.addSubview(playButtonView)
}
@objc func tapDetected() {
print("tap!")
let player = AVPlayer(url: self.mediaURL!)
let controller = AVPlayerViewController()
controller.player = player
self.window?.rootViewController?.present(controller, animated: true) {
player.play()
}
}
func setupImage(url: URL) {
let imageView = UIImageView()
imageView.frame = self.bounds
imageView.autoresizingMask = [.flexibleWidth,.flexibleHeight]
self.addSubview(imageView)
imageView.kf.setImage(with: url)
}
}然而，当我点击play按钮时，我得到了以下错误：
Warning: Attempt to present <AVPlayerViewController: 0x7fe8b200b000> on <SweatNet.MainTabBarController: 0x7fe8b4816400> whose view is not in the window hierarchy!它来自这一行: self.window?.rootViewController?.present。我想它被我调用rootViewController (看起来是SweatNet.MainTabBarController)弄糊涂了。我想让它给SweatNet.TagViewController打电话。这是一个包含单元格的单元格，该单元格包含自定义MediaPlayerView，但我不知道如何获得对它的引用。
回答 2
Stack Overflow用户
回答已采纳
发布于 2018-06-04 03:44:47
我会对这个答案的一些反馈感兴趣，因为我认为这是我以错误的方式思考iOS系统的一个例子。我最终意识到的是，我试图将视图控制器代码放在自定义视图中。查看控制器代码，它是启动AVPlayerViewController的代码。相反，我应该把这个逻辑放在我的视图控制器中。
我所做的工作是在视图控制器中使用collectionView委托方法didSelectItemAt indexPath: IndexPath，其中集合视图的视图控制器逻辑如下所示：
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
if collectionView == self.collectionView {
let post = posts[indexPath.row]
if post.isVideo == true {
self.performSegue(withIdentifier: "playVideo", sender: nil)
} else {
print("is image. might go full screen one day here")
}
}这是可行的，我相信这比编写视图的自定义方面来启动AVPlayerViewController要好。但也有可能这两种方法都有效--我真的不太了解iOS开发，无法做出这样的决定。欢迎提出任何意见。
Stack Overflow用户
发布于 2018-05-17 14:01:03
试试这个：
class func topViewController(controller: UIViewController? = UIApplication.shared.keyWindow?.rootViewController) -> UIViewController? {
if let navigationController = controller as? UINavigationController {
return topViewController(controller: navigationController.visibleViewController)
}
if let tabController = controller as? UITabBarController {
if let selected = tabController.selectedViewController {
return topViewController(controller: selected)
}
}
if let presented = controller?.presentedViewController {
return topViewController(controller: presented)
}
return controller
}将你的方法写成：
@objc func tapDetected() {
print("tap!")
let player = AVPlayer(url: self.mediaURL!)
let controller = AVPlayerViewController()
controller.player = player
topViewController().present(controller, animated: true) {
player.play()
}
}这将返回层次结构中排名靠前的vc。希望它能帮上忙！
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/50381534
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