Why Are My Fixed Background Images Blurred in iOS7 and How Can I Fix Them?

Fixing Background Image Issues in iOS7

One can encounter difficulties when using fixed background images in iOS7. This issue arises when the background image appears enlarged and blurred, particularly on iPads. To address this, it's necessary to examine the CSS code being used.

The code snippet provided by the user includes the following CSS declarations:

.header {
  display: table;
  height: 100%;
  width: 100%;
  position: relative;
  color: #fff;
  background: url(../images/boston2.jpg) no-repeat center center fixed; 
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}

The problematic combination is the use of background-attachment: fixed with background-size: cover. This pairing causes compatibility issues with many mobile browsers, including iOS7.

Solution 1: Background-Attachment: Scroll

One option is to replace background-attachment: fixed with background-attachment: scroll. While this won't achieve the desired "fixed" effect, at least the images will be visible.

Solution 2: Background-Position: Scroll with JavaScript

Alternatively, one can use background-position: scroll and implement JavaScript to maintain the image's position at the top of the viewport. This approach requires slightly more advanced coding but offers a more visually appealing solution.

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