Where is pngcrush for Xcode 4.3?
Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin
pngcrush的使用
pngcrush -d decresults -revert-iphone-optimizations *.png
(-d是输出文件夹的名称)
批量将png图片转换成crushpng图片的命令为：/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/pngcrush -d decresults -iphone *.png