Compress an image with fixed width iOS swift

Solution:

The below code will return the Data with compressed image.You can give the image and the width of the  image.


func compressImage(img:UIImage,givenWidth:CGFloat) ->Data {
        print("before compression",UIImagePNGRepresentation(img)?.count)
        print("before width and height",img.size)

        let newWidth:CGFloat = givenWidth
        let scale = newWidth / img.size.width
        let newHeight = img.size.height * scale
        UIGraphicsBeginImageContext(CGSize(width: newWidth, height: newHeight))
        img.draw(in: CGRect(x: 0, y: 0, width: newWidth, height: newHeight))
        let newImage = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        var compression = 0.9
        let maxCompression = 0.1
       
        print("after compression",UIImagePNGRepresentation(newImage!)?.count)
        print("after width and height",newImage?.size)
        var imageData = UIImageJPEGRepresentation(newImage!, CGFloat(compression));

        while ((imageData?.count)! > maxImgSize && compression > maxCompression)
        {
            compression -= 0.1;
            imageData = UIImageJPEGRepresentation(newImage!, CGFloat(compression))
        }
       
        return imageData!
    }