Change UIImageView size to match image with AutoLayout

Question

I want to change my UIImageView height/width to match the image i choose from photo album and i found a snippet on here that does that.

-(CGRect)frameForImag         


        

Answer 1

Here is a Swift class that will help return the correct sizing for an image based on a width or height limit that you choose:

class func returnImageSizeForHeightLimit(heightLimit:CGFloat?, orWidthLimit widthLimit:CGFloat?, forImage theImage:UIImage)->CGSize?{

    if let myHeightLimit = heightLimit {

        let theWidth = (myHeightLimit/theImage.size.height) * theImage.size.width

        return CGSizeMake(theWidth, myHeightLimit)
    }

    if let myWidthLimit = widthLimit {

        let theHeight = (myWidthLimit/theImage.size.width) * theImage.size.height

        return CGSizeMake(myWidthLimit, theHeight)
    }

    return nil
}