core-graphics Archives

iphone, Programming

IT Nursery

UIImage: Resize, then Crop

I’ve been bashing my face into this one for literally days now and even though I feel constantly that I am right on ...

June 4, 2022
0 Comments

cocoa, Programming

IT Nursery

How to get pixel data from a UIImage (Cocoa Touch) or CGImage (Core Graphics)?

I have a UIImage (Cocoa Touch). From that, I’m happy to get a CGImage or anything else you’d like that’s available. I’d like ...

May 31, 2022
0 Comments

objective-c, Programming

IT Nursery

invalid context 0x0 under iOS 7.0 and system degradation

I’ve read as many search results I could find on this dreaded problem, unfortunatelly, each one seems to focus on a specific function ...

May 27, 2022
0 Comments

How do I draw a shadow under a UIView?

I’m trying to draw a shadow under the bottom edge of a UIView in Cocoa Touch. I understand that I should use CGContextSetShadow() ...

May 11, 2022
0 Comments

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