Question

I m trying to allow the user to take 16x9 aspect ratio images to look like they are nice HD photos. I m using the cameraViewOverlay to overlay black bars on both ends, but when the image is taken, how do I crop the top and bottom without resizing or changing the scale of the image?

Thanks.

Answer 1

There are various posts around on how to scale/crop a UIImage you get back from the camera, like this one.

It s a little trickier than you d expect, because camera images are rotated, so you have to think about rotations even if you re just cropping.

Answer 2

you can add "picker.imageEditing=YES" to your code when you take the image. Then you have to set the imageView proprieties in the interface builder: Image View Attributes -> View -> Mode -> Aspect fit, or other option as you wish

Answer 3

Check this solution by Ming Yang. https://github.com/myang-git/iOS-Image-Crop-View

It lets the user crop the image by sliding or dragging the edges of a rectangle around the required portion of the image. I presume this code can be modified to suit your cropping need be it automatic or manual.

It is coded in Objective-C. You may have to either code it in Swift or simply build a bridging header to connect the Objective-C code with Swift code.

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