I\'m noticing my Phonegap app is having some memory issues on iOS7 that weren\'t happening on iOS6 .
The best solution for this problem I found is the following code:
var img = document.getElementById('imageID');
img.parentNode.removeChild(img);
img.src = 'data:image/gif;base64,' +
'R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=';
setTimeout(function() {
img = null;
}, 60000);
This sets the src attribute to a tiny gif and then waits long enough for garbage collection to happen eventually.
See: http://www.fngtps.com/2010/mobile-safari-image-resource-limit-workaround/
This should work for you. I could verify that the memory is released by using the Xcode instruments. Unfortunately this solution doesn't seem to work for homescreen apps which I am using.