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Editorial Team
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Asked: 2026-05-18T02:05:48+00:00

I’m trying to emulate Apple’s Slide to Unlock feature in my application. I get

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I’m trying to emulate Apple’s “Slide to Unlock” feature in my application. I get to this point (image below), but as you can see the UISlider’s “track” is visible and is covering up my text. Is there a way to change an attribute programmatically that will make the “track” invisible?

alt text

Please let me know if you need any of my code.

Thanks in advance!

EDIT: If I change the slider’s alpha to 0, it gets rid of my sliding button, so doing that won’t work unless I’m doing it wrong. 🙂

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1 Answer

  1. Editorial Team

    Actually I just figured it out. Here’s what I did:

    UIImage *sliderMinimum = [[UIImage imageNamed:@"clearTrack.png"] stretchableImageWithLeftCapWidth:4 topCapHeight:0];
[slider setMinimumTrackImage:sliderMinimum forState:UIControlStateNormal];
UIImage *sliderMaximum = [[UIImage imageNamed:@"clearTrack.png"] stretchableImageWithLeftCapWidth:4 topCapHeight:0];
[slider setMaximumTrackImage:sliderMaximum forState:UIControlStateNormal];

    clearTrack.png is just a clear slider image I made.

    Now I have this: yay!
    alt text

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