objective c - AVPlayer playbackBufferFull called but currentItem.playbackBufferFull is false -


i have avplayer observe playbackbufferfull with:

player.currentitem!.addobserver(self, forkeypath: "playbackbufferfull", options: [.new, .initial], context: &playerviewcontrollerkvocontext) 

observevalueforkeypath called , have following code

if keypath == "playbackbufferfull" {       print("\(player.currentitem?.playbackbufferfull)") } 

which prints optional(false).

why property still false? shouldn't true? why seeing behaviour?


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