objective-c - How to synchronize music content data from one player to two controllers in iOS?

Question

One player and two controllers need to display the progress bar and playback content synchronously. That is, first play the music on controller A, click controller B, and if it is the same song, it will directly display the progress bar of controller A. The music content being played cannot re-request data. . .

Answer 1

Write a global player using a singleton