[英]How to detect fullscreen mode using AVPlayerViewController in Swift?
我試圖檢測AVPlayerViewController
何時處於全屏模式,但我很難實現這一點。 我想知道用戶何時選擇展開按鈕進入全屏,如下所示:
我已經根據這些建議添加了適當的觀察者:
相應的代碼:
var avWidth:CGFloat = 375
var avHeight:CGFloat = 300
override func viewDidLoad()
{
super.viewDidLoad()
let path = NSBundle.mainBundle().pathForResource("cable pressback", ofType: "mp4")
let url = NSURL.fileURLWithPath(path!)
let player = AVPlayer(URL: url)
playerViewController.player = player
playerViewController.view.frame = CGRectMake(0, 100, self.view.frame.size.width, 300)
playerViewController.view.translatesAutoresizingMaskIntoConstraints = true
view.addSubview(playerViewController.view)
self.addChildViewController(playerViewController)
[playerViewController .addObserver(self, forKeyPath:"videoBounds" , options: NSKeyValueObservingOptions.New, context: nil)]
}
override func observeValueForKeyPath(keyPath: String?, ofObject object: AnyObject?, change: [String : AnyObject]?, context: UnsafeMutablePointer<Void>)
{
print("playerViewController.view.frame = \(playerViewController.view.frame)")
if keyPath == "videoBounds"
{
let rect = change!["new"]! as! NSValue
if let newrect = rect.CGRectValue() as CGRect?
{
if newrect.width > 0 || newrect.height > 0
{
if avWidth > 0 || avHeight > 0
{
if newrect.width > avWidth || newrect.height > avHeight
{
print("Full Screen")
}
else if newrect.width < avWidth || newrect.height < avHeight
{
print("Normal screen")
}
}
avWidth = newrect.width
avHeight = newrect.height
}
}
}
}
但是,它似乎永遠不會到達代碼print("Full Screen")
。 無論播放器處於正常模式還是全屏模式,它都會點擊print("Normal Screen")
。
謝謝!
從 iOS 12 開始,我們可以使用這些AVPlayerViewControllerDelegate委托方法:
func playerViewController(AVPlayerViewController, willBeginFullScreenPresentationWithAnimationCoordinator: UIViewControllerTransitionCoordinator)
func playerViewController(AVPlayerViewController, willEndFullScreenPresentationWithAnimationCoordinator: UIViewControllerTransitionCoordinator)
為 Swift 3 更新:
為playerViewController
對象添加一個觀察者:
playerViewController(self, forKeyPath: "videoBounds", options: NSKeyValueObservingOptions.new, context: nil)
override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?)
{
if keyPath == "videoBounds"
{
if let rect = change?[.newKey] as? NSValue
{
if let newrect = rect.cgRectValue as CGRect?
{
// 200 is height of playerViewController in normal screen mode
if newrect.size.height <= 200
{
print("normal screen")
}
else
{
print("full screen")
}
}
}
}
}
您的代碼幫助我處理全屏和返回之間的切換。
但是對於識別部分,我只是根據我的要求稍微更改了它。
let rect = change!["new"] as! NSValue
if let playerRect: CGRect = rect.CGRectValue() as CGRect {
if playerRect.size == UIScreen.mainScreen().bounds.size {
print("Video in full screen")
} else {
print("Video not in full screen")
}
}
希望這可以幫助。
在 iOS11 中,如果 AVPlayer 全屏顯示,您屏幕的安全區域將降至 0。 雖然它可能是一個未記錄的功能(因此有潛在的錯誤)。 我很難找到有關它的更多信息。
[UIApplication sharedApplication].keyWindow.safeAreaLayoutGuide.layoutFrame.size.height == 0?
這是@Pangu 答案的略微優化的 Swift 4.2 版本。 它只檢測變化,否則在與視頻交互(如快進)時也會調用觀察者。 我還用AVPlayerViewController.videoBounds
鍵路徑替換了“videoBounds”以避免字符串並使用窗口邊界來確定它是否是全屏的。
avPlayerViewController.addObserver(self, forKeyPath: #keyPath(AVPlayerViewController.videoBounds), options: [.old, .new], context: nil)
override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey: Any]?, context: UnsafeMutableRawPointer?) {
if keyPath == #keyPath(AVPlayerViewController.videoBounds) {
// detect only changes
if let oldValue = change?[.oldKey] as? CGRect, oldValue != CGRect.zero, let newValue = change?[.newKey] as? CGRect {
// no need to track the initial bounds change, and only changes
if !oldValue.equalTo(CGRect.zero), !oldValue.equalTo(newValue) {
if newValue.size.height < UIScreen.main.bounds.height {
print("normal screen")
} else {
print("fullscreen")
}
}
}
}
}
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