class in UnityEngine.Timeline
/
实现接口：IPropertyPreview, ISerializationCallbackReceiver, ITimelineClipAsset
切换到手册一个代表时间轴的 PlayableAsset。
| duration | 时间轴的长度（以秒为单位）。 |
| durationMode | 时间轴持续时间的计算方式。 |
| fixedDuration | 当 durationMode 被设置为固定长度时，时间轴的长度。 |
| outputTrackCount | 返回时间轴中输出轨道的数量。 |
| rootTrackCount | 返回处于时间轴根层的轨道的数量。 |
| CreateTrack | 让您可以创建轨道并将其添加到时间轴。 |
| DeleteClip | 从此时间轴中删除剪辑。 |
| DeleteTrack | 从时间轴中删除轨道，包括所有剪辑和子轨道。 |
| GetOutputTrack | 从给定索引中检索输出轨道。 |
| GetOutputTracks | 获取时间轴中所有输出轨道的列表。 |
| GetRootTrack | 检索指定索引中的根轨道。 |
| GetRootTracks | 获取所有根轨道的可枚举列表。 |
| hideFlags | 该对象应该隐藏、随场景一起保存还是由用户修改？ |
| name | 对象的名称。 |
| duration | 实例化 Playable 的播放持续时间，以秒为单位。 |
| outputs | 实例化 Playable 输出的描述。 |
| GetInstanceID | 返回对象的实例 ID。 |
| ToString | 返回 GameObject 的名称。 |
| CreatePlayable | 实现此方法以使资源将可播放项注入给定图中。 |
| Destroy | 删除 GameObject、组件或资源。 |
| DestroyImmediate | 立即销毁对象 /obj/。强烈建议您改用 Destroy。 |
| DontDestroyOnLoad | 在加载新的 Scene 时，请勿销毁 Object。 |
| FindObjectOfType | 返回第一个类型为 type 的已加载的激活对象。 |
| FindObjectsOfType | 返回所有类型为 type 的已加载的激活对象的列表。 |
| Instantiate | 克隆 original 对象并返回克隆对象。 |
| CreateInstance | 创建脚本化对象的实例。 |
| bool | 该对象是否存在？ |
| operator != | 比较两个对象是否引用不同的对象。 |
| operator == | 比较两个对象引用，判断它们是否引用同一个对象。 |
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