Need a little help to Mac cocoa programming

Monkey Archive Forums/Digital Discussion/Need a little help to Mac cocoa programming

Tri|Ga|De(Posted 2013) [#1]
I'm working on my Smartphone App Store Icons & Images Tool for Mac and it is going very well. But I ran into a problem.

I can't figure out how to put some effects on my images.

Does anyone here know how to do this.

I'm working in Xcode and Object-C.