UIImageView contentMode Top

Question

I've got an image that I need crop. To do this, I wanted to use the contentMode (set it to Top/TopLeft instead of Aspect Fit) but when I'm doing this, the image go back to it's real size (and not the size I gave to it). So my question is :

How to crop the bottom of my image retaining its size ?

Thanks a lot.

Himanshu Joshi · Answer 1 · 2014-03-07T12:58:23.533

0

May be you have to set the rect for the imageView

imageView is the instance of UIImageView

Let the rectangle to be cropped is croppedRect

CGImageRef imageRef = CGImageCreateWithImageInRect([imageView.image CGImage], croppedRect);
[imageView setImage:[UIImage imageWithCGImage:imageRef]]; 
CGImageRelease(imageRef);

edited Mar 07 '14 at 12:58

answered Mar 07 '14 at 12:05

Himanshu Joshi

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That seems to be what I need but it behaves strangely. If i want to crop the bottom, am I supposed to give him a rect like '0, 0, width, height - x' or 'Xpos, Ypos, width, size - 128'. I tried those cases and no one worked.. – Aeradriel Mar 07 '14 at 12:56
What strange? The code is working fine for me. See my edited code – Himanshu Joshi Mar 07 '14 at 13:04
Yeah, I guessed the mistake but it zoom on my image and not showing the right rect. Moreover, it seems that x and y values are reversed. – Aeradriel Mar 07 '14 at 13:11
Image is cropped and it is looking like zoom effect because the size of UIImageView is constant. – Himanshu Joshi Mar 07 '14 at 13:13
So i just have to resize my image frame according to this ? – Aeradriel Mar 07 '14 at 13:15
resizing your image frame will show unknown behavior in your UI. And moreover, its not a zoom effect, its just cropping – Himanshu Joshi Mar 07 '14 at 13:18
Does it crop the real-sized image or the image of the size I gave to it ? – Aeradriel Mar 07 '14 at 13:32

UIImageView contentMode Top

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