PreloadState
The loading statuses of music assets.
Enumerator
- kPreloadStateCompleted
- 0: The preload of music assets is complete.
- kPreloadStateFailed
- 1: The preload of music assets fails.
- kPreloadStatePreloading
- 2: The music assets are preloading.
- kPreloadStateRemoved
- 3：缓存的音乐资源已被移除。