How can I get the height and width of an uiimage?

From the URL Image in Mail

I'm adding image to mail view. It will show full image. But I want to calculate, proportionally change the height and width of the image.

How can I get the height and width of UIImage?

let heightInPoints = image.size.height
let heightInPixels = heightInPoints * image.scale

let widthInPoints = image.size.width
let widthInPixels = widthInPoints * image.scale

Use the size property on the UIImage instance. See the documentation for more details.

UIImage *img = [UIImage imageNamed:@"logo.png"];

CGFloat width = img.size.width;
CGFloat height = img.size.height;