The iPad running ios6 is having trouble displaying a PNG background image

Everything was loading smoothly and looking great on ios5.

However, when ios6 came around, a strange issue arose with one section of my website. This particular section, which utilizes a png image as its background, would start to render on the iPad but then inexplicably turn black (while all other sections remained unaffected).

Here's the code snippet:

<section id="showcase">
    <section class="container">
    <img src="images/usp.jpg" alt="USP Screen" id="screen">

    <h2>title</h2>    

    <p>the text.</p>

    <p>The text.</p>
    </section></section>

And here's the CSS:

#showcase           { background: url(../images/showcasebg.png) repeat-x #ededed; height: 600px; position: relative; top: 87px; }
#showcase h2        { float: left; max-width: 422px; font-family: 'Lobster', cursive; font-size: 36px; margin-top: 20px; }
#showcase p         { float: left; max-width: 422px; margin-top: 20px; }

Answer №1

Encountering a similar issue on one of our websites, I found that the mobile site was displaying background PNG images as black bars on iOS6 (Chrome and Safari Apps).

To resolve this issue, I simply re-saved the images for web with the following specifications:

  • Ensure they are minimum of 10px wide
  • Save them as non-interlaced PNGs

Implementing these changes immediately resolved the display problem.

Answer №2

Last night, I encountered a similar issue that may not be directly related. While using a relative URL for an image, I noticed that iOS6 was encoding spaces in the image path as %2520 instead of %20. This became problematic when viewing the image resource in a web view within an app on simulator since the simulator's provided path includes spaces. Interestingly, this issue did not occur on an actual device where there are no spaces in the path.

During my troubleshooting process, I found the new remote inspector, discussed in detail at , to be extremely helpful in identifying and resolving the problem.

Answer №3

Recently, I came across an issue on a server where the PNG needed to be converted from 8-bit integer precision to 32-bit in order for it to display correctly on iOS devices. It seems that iOS struggles with handling images that are only 8-bit, although it's unclear how it handles 16-bit images. My suspicion is that Photoshop may have automatically adjusted the image due to its simplicity (just a basic gradient). Thankfully, I was able to easily resolve the problem by switching the image to 32-bit integer precision in GIMP:

Image -> Precision -> 32-bit integer

Answer №4

Adjusting the dimensions of my image appears to resolve the issue, however, when zooming in, an unexpected problem arises... In the end, converting the image to jpg format proved to be the optimal solution for me.

Answer №5

Experiencing a similar issue on my website's work section (). The pages feature long png images that often fail to load completely or crash after loading. It may appear fine at first glance, but upon further inspection, the issue is evident.

This problem seems to be specific to ios6 users only.

Answer №6

Our team encountered a similar issue.

To resolve it, we decided to open the PNG file in a different software and save it again. Surprisingly, this simple action fixed the problem without having to make any other adjustments like changing color profiles. It seems that only a couple of PNG images on our website were affected, indicating that those specific files may have been corrupted during their initial creation.

The exact cause remains unknown. shrug

Answer №7

I recently encountered a similar issue while using iOS6 Safari. A repeat-x .PNG background image was displaying as black. To quickly resolve the problem, I converted it to a .JPG file and the rendering issue was fixed.

Answer №8

What helped me may not work for everyone:

  • For certain images, removing the interlacing was the solution
  • Other images required both interlacing and transparency removal to resolve the issue
  • I experimented with adjusting the widths, but it didn't seem to make a difference.

Just sharing my own experience

Answer №9

Recently encountered a similar issue, but found that saving the .png without interlacing fixed the issue.

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