How do I create a music progress indicator/control, like the iPod app? [closed]
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28-10-2019 - |
Question
I'm writing an iPod app replacement, and in my "now playing" view I want to have a progress indicator like the iPod app, that shows current position, and allows the user to drag to change the play position.
How do I do that?
Do I use a UISlider and UIProgressView?
Solution
Omitted some things here and there, but it's enough to plug in.
// .h
IBOutlet UISlider *progressSlider;
NSTimer *progressTimer;
@property (nonatomic, retain) UISlider *progressSlider;
@property (nonatomic, retain) NSTimer *progressTimer;
- (void)updateSlider;
- (void)resetTimer:(NSTimer *)timer;
// .m
// synthesize variables
- (void)handleNowPlayingItemChanged:(id)notification {
NSNumber *duration = [item valueForProperty:MPMediaItemPropertyPlaybackDuration];
float totalTime = [duration floatValue];
progressSlider.maximumValue = totalTime;
}
- (void)updateSlider {
[progressSlider setValue:musicPlayer.currentPlaybackTime animated:YES];
}
- (void)resetTimer:(NSTimer *)timer {
[progressTimer invalidate];
progressTimer = nil;
progressTimer = [NSTimer scheduledTimerWithTimeInterval:1 target:self
selector:@selector(updateSlider)
userInfo:nil repeats:YES];
}
// init and release methods (together at the bottom with view controls
// (like viewDidLoad) for convenience)
//
// don't forget to register for notifications
@end
If you want a sample app (device only; iPod library), I can write one, but it won't be much more than this.
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