iPhone Programming: Making Sounds-Adding a duration slider.

Опубликовано: 29 Март 2026
на канале: MilmersXcode

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In this tutorial I teach you how to add a duration slider that will allow the user to choose the time that the song plays from in your app.

Main Code:

In .h:

IBOutlet UISlider *positionSlider;
NSTimer *soundTimer;
(IBAction)changePosition;
(void) updateSlider;

In .m in viewDidLoad:

soundTimer = nil;

positionSlider.maximumValue = sound.duration;
positionSlider.minimumValue = 0;
sound.currentTime = positionSlider.value;

(IBAction)changePosition {
sound.currentTime = positionSlider.value;
}

(void) updateSlider {

[positionSlider setValue:sound.currentTime];
}

in playSound:

if (![sound isPlaying]) {
if (soundTimer == nil)
soundTimer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(updateSlider) userInfo:nil repeats:YES];
} else {
[soundTimer invalidate];
soundTimer = nil;
}

In resetSound:

positionSlider.value = sound.currentTime;
[soundTimer invalidate];
soundTimer = nil;

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