xcode - How to manually create icns files using iconutil?

Question

When I'm validating my app I get this error:

the application bundle does not contain an icon in ICNS format, containing both a 512x512 and a 512x512@2x image.

I use to make the icns icons with Img2icns app and until today it always worked properly. But now I'm getting that error and there's no way to make it work. I tried to put two PNG files together (512x512 and 1024x1024) in Img2icns but I always get that error. I also tried to follow the instructions in Apple's OS X Human Interface Guideline but when I try to make the icon sets I get this terminal error:

-bash: syntax error near unexpected token 'newline'

I am not very good with terminal commands so maybe I'm doing something wrong. I wrote:

iconutil -c icns </Users/myname/SDK Mac Apps/MyApp/grafica/icon.iconset>

If anyone could help it would be very much appreciated. Thanks, Massy.

Answer 1

Here's a script to convert a 1024x1024 png (named "Icon1024.png") to the required icns file. Save it to a filed called "CreateICNS.src" in the folder where your png file is then in terminal "cd" to the same folder and type "source CreateICNS.src" to call it:

mkdir MyIcon.iconset
sips -z 16 16     Icon1024.png --out MyIcon.iconset/icon_16x16.png
sips -z 32 32     Icon1024.png --out MyIcon.iconset/icon_16x16@2x.png
sips -z 32 32     Icon1024.png --out MyIcon.iconset/icon_32x32.png
sips -z 64 64     Icon1024.png --out MyIcon.iconset/icon_32x32@2x.png
sips -z 128 128   Icon1024.png --out MyIcon.iconset/icon_128x128.png
sips -z 256 256   Icon1024.png --out MyIcon.iconset/icon_128x128@2x.png
sips -z 256 256   Icon1024.png --out MyIcon.iconset/icon_256x256.png
sips -z 512 512   Icon1024.png --out MyIcon.iconset/icon_256x256@2x.png
sips -z 512 512   Icon1024.png --out MyIcon.iconset/icon_512x512.png
cp Icon1024.png MyIcon.iconset/icon_512x512@2x.png
iconutil -c icns MyIcon.iconset
rm -R MyIcon.iconset