是否有可能将UIView的特定区域转换为iPhone中的UIImage

Question

I have already done to convert UIView into UIImage but i want that any particular section of the UIView be converted into UIImage so it is possible

UIGraphicsBeginImageContext(view.bounds.size);
[view.layer drawInContext:UIGraphicsGetCurrentContext()];
UIImage * img = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

Answer 1

Try this:

CGImageRef imageRef = CGImageCreateWithImageInRect([theImage CGImage], someRect);
CGFloat width = CGImageGetWidth(imageRef);
CGFloat height = CGImageGetHeight(imageRef);
CGContextDrawImage(UIGraphicsGetCurrentContext(), CGRectMake(0, 0, width, height), imageRef);
UIImage *croppedImage = UIGraphicsGetImageFromCurrentImageContext();

You first would save the original UIImage from the UIView and then crop it with the above method. someRect is the rectangle area you want from the original UIView .

Answer 2

CGImageRef imageRef = CGImageCreateWithImageInRect([theImage CGImage], someRect);
CGFloat width = CGImageGetWidth(imageRef);
CGFloat height = CGImageGetHeight(imageRef);
CGContextDrawImage(UIGraphicsGetCurrentContext(), CGRectMake(0, 0, width, height), imageRef);
UIImage *croppedImage = UIGraphicsGetImageFromCurrentImageContext();
NSData *data= UIImagePNGRepresentation(croppedImage);
UIImage *img = [UIImage imageWithData:data];
UIGraphicsEndImageContext();
return img;