User Controls
The sample app provides the user with several buttons designed to allow them to interact with the music, such as play, pause, skip, and previous, as well as jumping forward and backward by 30 seconds. The first action that needs to be implemented is the play and pause method. The button functions as a simple toggle: If the music is already playing, it is paused; if it is paused or stopped, it resumes playing. The code to update the text of the button from play to pause and vice versa is discussed as part of the state change notification callback in the section “Handling State Changes.”
- (IBAction)playButtonAction:(id)sender{ if ([player playbackState] == MPMusicPlaybackStatePlaying) { [ ...
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