iOS10.0 AvPlayerItem.duration.value 不正确

Question

let value = avPlayerItem.currentItem.duration.value
print(value)

结果是:

iOS10.0 ---> 29206080

iOS12.0 ---> 48676608

有人知道这个问题吗？

Answer 1

不确定，但可能是您的播放器项目未处于准备播放状态。执行此操作的推荐方法，如 manual 中所述是通过观察播放器元素状态:

[self.avPlayer.currentItem addObserver:self forKeyPath:@"status" options:NSKeyValueObservingOptionNew|NSKeyValueObservingOptionInitial context:nil];

然后，在 observeValueForKeyPath:ofObject:change:context:

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{
    // TODO: use either keyPath or context to differentiate between value changes
    if (self.avPlayer.currentItem.status == AVPlayerStatusReadyToPlay) {
        Float64 duration = CMTimeGetSeconds(self.avPlayer.currentItem.duration);
        // ...
    }
}