我以编程方式为我的应用添加了一个介绍视频。我得到以下警告。我有什么想法,我做错了什么? 我对swift和iOS开发非常陌生。
2018-04-19 13:11:56.295952 + 0200 [1779:395252] [LayoutConstraints] 无法同时满足约束。可能至少有一个 以下列表中的约束是您不想要的。尝试 这个:(1)看看每个约束并试着弄清楚你是哪个 不要指望; (2)找到添加了不需要的约束的代码 或约束并修复它。 ( "&#34 ;, "&#34 ;, " (有效,姓名:' |':UIStackView:0x15dd29110)>", "&#34 ;, " (有效,姓名:' |':UIStackView:0x15dd29110)>" )
将尝试通过违反约束来恢复
在UIViewAlertForUnsatisfiableConstraints处创建一个符号断点 在调试器中捕获它。方法中的 在UIView中列出的UIConstraintBasedLayoutDebugging类别 也可能有所帮助。 2018-04-19 13:11:56.296790 + 0200 [1779:395252] [LayoutConstraints]无法同时满足 限制。可能至少有一个限制因素 以下列表是您不想要的。试试这个:(1)看看每一个 约束并试图找出你不期望的东西; (2)找到 添加了不需要的约束或约束并修复它的代码。 ( "&#34 ;, "&#34 ;, "&#34 ;, " UILayoutGuide:0x1d41bd180' UIViewLayoutMarginsGuide'
(有效,姓名:' |':UIStackView:0x15dd29110)>", " (有效,姓名:' |':UIStackView:0x15dd29110)>" )将尝试通过违反约束来恢复
在UIViewAlertForUnsatisfiableConstraints处创建一个符号断点 在调试器中捕获它。方法中的 在UIView中列出的UIConstraintBasedLayoutDebugging类别 也可能会有帮助。
var movieController: AVPlayer?
let playerViewController = AVPlayerViewController()
override func viewDidLoad() {
playVideo()
}
func playVideo() {
let path = Bundle.main.path(forResource: appData.videoFile, ofType: appData.videoExtension)
let url = URL(fileURLWithPath: path!)
movieController = AVPlayer(url: url)
NotificationCenter.default.addObserver(self, selector:#selector(movieFinished),name: NSNotification.Name.AVPlayerItemDidPlayToEndTime, object: movieController?.currentItem)
playerViewController.player = self.movieController
playerViewController.delegate = self
playerViewController.view.frame = self.view.bounds
playerViewController.showsPlaybackControls = false
playerViewController.videoGravity = "AVLayerVideoGravityResizeAspectFill"
playerViewController.view.translatesAutoresizingMaskIntoConstraints = false
playerViewController.player?.play()
self.view.addSubview(playerViewController.view)
}
@objc func movieFinished() {
let value = UIInterfaceOrientation.portrait.rawValue
UIDevice.current.setValue(value, forKey: "orientation")
UIViewController.attemptRotationToDeviceOrientation()
UIView.animate(withDuration: 1.5, delay: 0, options: .curveEaseIn, animations: {
self.playerViewController.view.alpha = 0.0
}, completion: { (finished: Bool) in
self.playerViewController.view.removeFromSuperview()
})
}
答案 0 :(得分:0)
我最终通过使用AVPlayerLayer和AVPlayerItem来解决这个问题。
var player:AVPlayer?
var playerItem:AVPlayerItem?
let playerLayer:AVPlayerLayer? = nil
override func loadView() {
super.loadView()
startWebiew()
}
func playVideo() {
let path = Bundle.main.path(forResource: appData.videoFile, ofType: appData.videoExtension)
let url = URL(fileURLWithPath: path!)
let playerItem:AVPlayerItem = AVPlayerItem(url: url)
player = AVPlayer(playerItem: playerItem)
let playerLayer=AVPlayerLayer(player: player!)
playerLayer.frame = view.bounds
playerLayer.videoGravity = AVLayerVideoGravity.resizeAspectFill
playerLayer.player?.play()
view.layer.addSublayer(playerLayer)
}