AVPlayer addObserver 永远不会被调用
AVPlayer addObserver never being called
我正在尝试获取 AVPlayer timedMetadata,但从未调用观察者
self.metaItem!.addObserver(self, forKeyPath: "metaData", options: NSKeyValueObservingOptions(), context: nil)
metPlayer=AVPlayer(playerItem: metaItem)
metPlayer.play()
...
override func observeValue(forKeyPath keyPath: String?, of object: Any?, change:
[NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
if keyPath != "metaData" { return }
print("...")
}
但 MPMoviePlayerController 工作正常
谢谢。
metaItem
AVPlayerItem 应该观察关键路径 timedMetadata,而不是 "metaData":
self.metaItem!.addObserver(self, forKeyPath: "timedMetadata", options: NSKeyValueObservingOptions(), context: nil)
我正在尝试获取 AVPlayer timedMetadata,但从未调用观察者
self.metaItem!.addObserver(self, forKeyPath: "metaData", options: NSKeyValueObservingOptions(), context: nil)
metPlayer=AVPlayer(playerItem: metaItem)
metPlayer.play()
...
override func observeValue(forKeyPath keyPath: String?, of object: Any?, change:
[NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
if keyPath != "metaData" { return }
print("...")
}
但 MPMoviePlayerController 工作正常
谢谢。
metaItem
AVPlayerItem 应该观察关键路径 timedMetadata,而不是 "metaData":
self.metaItem!.addObserver(self, forKeyPath: "timedMetadata", options: NSKeyValueObservingOptions(), context: nil)