Get underlying NSData from UIImage

Question

I can create UIImage from NSData using [UIImage imageWithData:] or [UIImage initWithData:] methods.

I wonder i

Answer 1

Swift 4.2

let dataPng = image.pngData() // return image as PNG. May return nil if image has no CGImageRef or invalid bitmap format

let dataJpg = image.jpegData(compressionQuality: 1) // return image as JPEG. May return nil if image has no CGImageRef or invalid bitmap format. compression is 0(most)..1(least)