How to check if a uiimage is blank? (empty, transparent)

Question

which is the best way to check whether a UIImage is blank?
I have this painting editor which returns a UIImage; I don\'t want to save this imag

Answer 1

I just encountered the same problem. Solved it by checking the dimensions:

Swift example:

let image = UIImage()

let height = image.size.height
let width = image.size.height

if (height > 0 && width > 0) {
    // We have an image
} else {
    // ...and we don't
}