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Editorial Team
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Asked: 2026-06-08T16:04:02+00:00

I’m trying to build a custom, reusable UIScrollView that can be added to multiple

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I’m trying to build a custom, reusable UIScrollView that can be added to multiple views. The scroll view is going to be a weight picker. For the life of me, I can’t find a decent example for how to implement this neatly or cleanly.

I would love for someone to point me to an existing library or tutorial that shows me how to do this. I’ve hacked apart a few examples, but so far, nothing is very good or reusable. Please help!!

For what it’s worth, I have an image that individual ticks for the weight. So I can select to the tenth of the number (e.g. 160.4). The image has the first tick bold and larger than the remaining 9. I’d like to have the weight/number centered over the large tick. I’ll update the points to my label/datasource after scrolling stops.

UPDATE
I need to make this. I have the custom font, background, and ticker image.

weight picker

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1 Answer

  1. Editorial Team

    If I were going to implement this, I would create a really wide image that had every weight on it I’d ever need – I would probably create this in code when the app started up. This image is then used as the contentView of your picker. You get all the scrolling features “for free”, and you could even update the values shown in the other parts of the view during scrolling (or dragging.

    The scrollView is just the area with the tick marks and weight numbers, and resides in a subview above the background, but below the centered vertical line that shows the actual weight.

    EDIT: on second thought, forget the image. If you have the code to draw the image, you can do the drawing in a custom UIView. So you get the draw rect, you know the contentOffset, so you can draw just what you need.

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