Question 217864 in IOS Swift Question posted in
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Ios swift – Change image scale in UIImageView

I’m trying to change the image scale in a UIImageView, I want it to be smaller and keep its ratio.

I tried cameraPhoto.image?.scale = CGFloat(0.5) but it doesn’t work, i get Cannot assign to property: 'scale' is a get-only property

Anyone knows how to get around this?

Thanks

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2

Answers


  1. 0

    I think you need to create UIImageView with size of your image and place it on UIScrollView (and disable scroll). Then you can change scale of scroll view.
    https://www.brightec.co.uk/blog/creating-a-zoomable-image-view-in-swift

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  2. 0

    You can use from this extensions:

    extension UIImage {
    func imageWithSize(size: CGSize) -> UIImage? {  
        UIGraphicsBeginImageContextWithOptions(size, false, UIScreen.main.scale);
        let rect = CGRect(x: 0.0, y: 0.0, width: size.width, height: size.height);
        draw(in: rect)
        
        let resultingImage = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();
        
        return resultingImage
    }


    func imageWithScale(scale: CGFloat) -> UIImage? {
        let width = self.size.width * scale
        let height = self.size.height * scale
        return self.imageWithSize(size: CGSize(width: width, height: height))
    }
}

    and use this function in your image

    let img = yourImage?.imageWithScale(scale: 0.5)
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