objective-c crop image - Stack Overflow

Question

For example, I have a picture like the one above. I want to crop out the three red areas into three new pictures, and convert them into a new UIImage object or save them to the album. , how to deal with it will be easier? (The red frame is for demonstration only, the actual picture does not have obvious red frame mark)

Answer 1

Put the frame in the array and then loop it?