Convert UIImage to NSData and convert back to UIImage in Swift?

Question

I\'m trying to save a UIImage to NSData and then read the NSData back to a new UIImage in Swift. To convert the UII

Answer 1

UIImage(data:imageData,scale:1.0) presuming the image's scale is 1.

In swift 4.2, use below code for get Data().

image.pngData()

Answer 2

Use imageWithData: method, which gets translated to Swift as UIImage(data:)

let image : UIImage = UIImage(data: imageData)

Answer 3

To save as data:

From StoryBoard, if you want to save "image" data on the imageView of MainStoryBoard, following codes will work.

let image = UIImagePNGRepresentation(imageView.image!) as NSData?

To load "image" to imageView: Look at exclamation point "!", "?" closely whether that is quite same as this one.

imageView.image = UIImage(data: image as! Data)

"NSData" type is converted into "Data" type automatically during this process.

Answer 4

Image to Data:-

    if let img = UIImage(named: "xxx.png") {
        let pngdata = img.pngData()
    }

   if let img = UIImage(named: "xxx.jpeg") {
        let jpegdata = img.jpegData(compressionQuality: 1)
    }

Data to Image:-

 let image = UIImage(data: pngData)

Answer 5

Now in Swift 4.2 you can use pngData() new instance method of UIImage to get the data from the image

let profileImage = UIImage(named:"profile")!
let imageData = profileImage.pngData()

Answer 6

Swift 5

let the image you create as UIImage be image

image.pngData() as NSData?