How to show specific area in UIImageView from iPhone?

Question

If I have a image size 1024*768, but I want to show a 100*100 square located on 200, 200. What is the simplest way to do it? Thz u.

Answer 1

You're basically talking about a "Crop" operation.

From HitScan in this question:

CGImageRef imageRef = CGImageCreateWithImageInRect([largeImage CGImage], cropRect);
// or use the UIImage wherever you like
[UIImageView setImage:[UIImage imageWithCGImage:imageRef]]; 
CGImageRelease(imageRef);