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Editorial Team
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Asked: 2026-06-02T18:50:16+00:00

I’m making a drawing tool with UIView’s touch events. The problem is touchesMoved event

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I’m making a drawing tool with UIView’s touch events.

The problem is

touchesMoved event doesn’t occur when trying to move very closely
right after touch began.

so it’s very difficult to draw 2~3 pixels line.

enter image description here
See it’s just one pixel.

But in iOS Simulator it works fine.

enter image description here

I thought it’s device’s problem
But in SketchBookX(popular drawing app), works fine, too.

enter image description here

I’m not using UIScrollView or UIGuestureRocognizer.

Please help me to solve this problem.

  • I took some screenshots AND ‘newbies are not allowed to post images..’ X(
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1 Answer

  1. Editorial Team

    Oh FINALLY I found my fault!

    enter image description here

    If touch moves very short after ‘touchesBegan’, doesn’t fire ‘touchesMoved’.

    But when ‘touchesEnd’ it gives moved point X(

    It’s little odd but finally i’ve done with it 🙂

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