madcoda / pnguncrush

Batch convert PNG files from iOS apps to normal PNG

pnguncrush

convert PNG files from iOS apps to normal PNG

I'm not a iOS developer, but I once need to extract some images from an exisiting iPhone App, this is a little shell scipt that helps me.

Usage

git clone https://github.com/madcoda/pnguncrush.git

# move the tool to where you want
cd ./pnguncrush
mv ./convert /path/to/your/pngs/

# make sure it's executable
cd /path/to/your/pngs/
chmod +x ./convert

# convert all the pngs in the folder
./convert *.png

Now you can find the converted PNGs in the "converted" folder

Requirements

• Install XCode from App Store

How do I get this command

A lot of QAs on the internet points me to use a tools in /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/pngcrush which I don't have on my Mac. In this Apple's Q&A it uses a tools "xcrun" which works for me. The command is found in https://developer.apple.com/library/ios/qa/qa1681/_index.html. This script is only the "loop" version of it for ease of use.