| playable | 此操作所用的 Playable。 |
PlayState Playable 的当前播放状态。
返回 Playable 的当前播放状态。
PlayState.Playing: The local time of this Playable will be updated during the evaluation of the PlayableGraph.
PlayState.Paused: The local time of this Playable will not be updated during the evaluation of the PlayableGraph.
PlayState.Delayed: The delay is elapsed during the evaluation of the PlayableGraph, the Playable will not start as long as there is still a delay.
注意：这是一种模板化扩展方法，适用于继承自 IPlayable 的任何类型。