pngData返回UIImage

Question

I have a UIImage variable, a . I would like to use it within my app as a .png data file. How do I go about recasting a back into a UIImage for use?

How can I cast this data object back into a UIImage ?

let pngImage = a!.pngData()

Answer 1

Converting UIImage to PNG Data:

extension UIImage {

    // UIImage to Data (PNG Representation)
    var PNGData: Data? {
        return UIImagePNGRepresentation(self)
    }
}

Using your example:

let a = UIImage("foo") // Sample image named foo

UIImage to Data:

let pngData = a.data

Data to UIImage:

let pngImage = UIImage(data: pngData)