How to decode base64 ecoded string to UIimage in swift 4? - swift4

Question

I have a encoded string from server which is a image.
Now I want to decode that string to anything(UIImage) you can and set to a UIImageView
Thanks in advance

Answer 1

I'm using the following extension for that:
extension UIImage: {
convenience init?(base64 str: String) {
guard let url = URL(string: str),
let data = try? Foundation.Data(contentsOf: url),
UIImage(data: data) != nil else { return nil }
self.init(data: data)!
}
}
Then you can do:
let image = UIImage(base64: someString)
Note, that for this to work, your base64 string must be formatted as follows: data:image/png;base64,... (or replacing png with jpeg).
If your base64 string does not have this prefix, you can do this:
extension UIImage: {
convenience init?(base64 str: String) {
guard let data = try? Foundation.Data(base64Encoded: str),
UIImage(data: data) != nil else { return nil }
self.init(data: data)!
}
}
Extra Credit
You can reverse the whole thing and convert an image to base64 string:
public enum ImageFormat {
case png
case jpeg
}
public func base64(format: ImageFormat, includingPrefix: Bool = true) -> String? {
var imageData: Foundation.Data?
switch format {
case .png: imageData = self.pngData
case .jpeg: imageData = self.jpegData
}
guard let data = imageData else { return nil }
return "data:image/\((format));base64," + data.base64EncodedString()
}

Answer 2

You can do the following:
let string: String = "YourBase64EncodedImageAsAString"
if let imageData = Data(base64Encoded: string), let image = UIImage(data: imageData) {
//use image
}

Answer 3

func base64ToImage(base64String: String?) -> UIImage{
if (base64String?.isEmpty)! {
return #imageLiteral(resourceName: "no_image_found")
}else {
// Separation part is optional, depends on your Base64String !
let tempImage = base64String?.components(separatedBy: ",")
let dataDecoded : Data = Data(base64Encoded: tempImage![1], options: .ignoreUnknownCharacters)!
let decodedimage = UIImage(data: dataDecoded)
return decodedimage!
}
}
You will pass args to your base64 data.