Save UIImage representation as PNG8, not PNG24?

Asked Oct 24 '15 at 16:16

Active Oct 24 '15 at 16:16

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How can a UIImage be saved as PNG8 (8-bit color mode) instead of PNG24 (24-bit color mode)?

The goal is to save space when dynamically saving many UIWebView screenshots that have less than 255 colors.

Right now I'm using UIImagePNGRepresentation after reducing the physical image size (Ref: here), but the images are still large.

Using UIImageJPEGRepresentation with a quality < 1.f is not desired. Any other ideas?

edited May 23 '17 at 11:59

Community

asked Oct 24 '15 at 16:16

Chan

please check out [this link](http://stackoverflow.com/questions/2457116/iphone-changing-cgimagealphainfo-of-cgimage/2484912#2484912) – Brian Daneshgar Oct 24 '15 at 17:43
Did you find out how to do that? – Dmytro Hutsuliak Feb 11 '16 at 16:02

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