Comments on: Fixing Blurry Subviews

By: Sean O'Connor

Sean O'Connor — Mon, 08 Feb 2010 12:55:03 +0000

I had that problem with odd pixel sized UIImageViews I was using on a UIScrollView. Every time you scrolled the screen the app moved the UIImagViews so they appeared to stay still relative to the scrolling background. All the even pixel sized UIImageViews looked fine but the odd ones went blurry. If I hadn’t been lucky and had some even sized ones which worked I’d have just written it off as an un-fixable iPhone quirk!

By: Zaph

Zaph — Sun, 17 Jan 2010 16:18:41 +0000

Rendering an UIImage that is an odd number of pixels wide into a UIImageView of exactly the same width and with an origin on integer values also causes pixel smearing. A workaround is to make the image 1 pixel wider.

By: iPhone UIView Has Blurred Subview | markjnet « Brainwash Inc. – iPhone/Mobile Development

Tue, 19 May 2009 15:37:08 +0000

[...] UIView Has Blurred Subview | markjnet iPhone UIView Has Blurred Subview | markjnet As the box is sized with an even number of pixels, 174 x 82, setting the origin relative to the [...]

By: Corey

Corey — Tue, 19 May 2009 06:53:27 +0000

Ideally, you are not scaling images on device and creating them in photoshop to the exact size needed. Planning, of course, to line up on whole pixels. This makes your views render faster and eliminates the blurring.

By: Joel Bernstein

Joel Bernstein — Sun, 17 May 2009 21:50:05 +0000

This is especially annoying with Core Animation layers, whose centers can be aligned based on constraint rules, so you don’t actually have a line of code assigning their position.