Batch optimization of PNGs for iphone/ipad display as xcode does

Question

I\'m working on a magazine viewer for ipad and I\'m struggling with the performance.

I figured out that the most expensive part of displaying the pngs is the loading

Answer 1

Try http://texturepacker.com

It can not only optimize PNGs but also reduce colors e.g. to RGBA4444 or RGB565 which decreases ping size dramatically and improves rendering on the devices.

You could also export PVR files for devices that support it (e.g. iOS, some Android)

And it also supports scaling down images for low res devices.