Convert between UIImage and Base64 string

Question

Does anyone know how to convert a UIImage to a Base64 string  and then reverse it   I have the below code  the original image before encoding is good  but I only get a blank image after I encode and decode it   NSData  imageData   UIImagePNGRepresentation viewImage    NSString  b64EncStr    self encode  imageData    NSString  base64String    self encodeBase64 imageData

User · Answer

See my class -  AppExtension swift      MARK  - UIImage  Base64 Encoding   public enum ImageFormat       case PNG     case JPEG CGFloat     extension UIImage        public func base64 format  ImageFormat  - gt  String           var imageData  NSData         switch format           case  PNG  imageData   UIImagePNGRepresentation self          case  JPEG let compression   imageData   UIImageJPEGRepresentation self  compression                    return imageData base64EncodedStringWithOptions  allZeros

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It s a very good to understand do you pass prefix as Tyler Sheaffer told  But for some reason you may need this prefix that describe the mime-type in the beginning of the base64 string  so I suggest this piece of code to pass some options before encoding  Swift 5    extension UIImage        enum Format  String           case png    png          case jpeg    jpeg             func toBase64 type  Format    jpeg  quality  CGFloat   1  addMimePrefix  Bool   false  - gt  String            let imageData  Data          switch type           case  jpeg  imageData   jpegData compressionQuality  quality          case  png   imageData   pngData                     guard let data   imageData else   return nil            let base64   data base64EncodedString options  Data Base64EncodingOptions lineLength64Characters           var result   base64         if addMimePrefix               let prefix    data image   type rawValue  base64               result   prefix   base64                   return result

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Swift version - create base64 for image  In my opinion Implicitly Unwrapped Optional in case of UIImagePNGRepresenatation   is not safe  so I recommend to use extension like below   extension UIImage        func toBase64   - gt  String            let imageData   UIImagePNGRepresentation self          return imageData  base64EncodedStringWithOptions NSDataBase64EncodingOptions Encoding64CharacterLineLength

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Swift 5 Encoding func convertImageToBase64String  img  UIImage  - gt  String       return img jpegData compressionQuality  1   base64EncodedString       quot  quot     Decoding func convertBase64StringToImage  imageBase64String String  - gt  UIImage       let imageData   Data init base64Encoded  imageBase64String  options   init rawValue  0       let image   UIImage data  imageData       return image      Note  Tested in xcode 10 2  Swift 4 Encoding func convertImageToBase64String  img  UIImage  - gt  String       let imageData NSData   UIImageJPEGRepresentation img  0 50   as NSData   UIImagePNGRepresentation img      let imgString   imageData base64EncodedString options   init rawValue  0       return imgString    Decoding func convertBase64StringToImage  imageBase64String String  - gt  UIImage       let imageData   Data init base64Encoded  imageBase64String  options   init rawValue  0       let image   UIImage data  imageData       return image     Note  Tested in xcode 9 4 1

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In swift 2 0 use this extension  credit to Jonas Franz   extension UIImage    func toBase64   - gt  String      let imageData   UIImagePNGRepresentation self       return imageData base64EncodedStringWithOptions  Encoding64CharacterLineLength

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convert Image to Base64  Encoding   let strBase64   imageData base64EncodedString options   lineLength64Characters   print strBase64      convert Base64 to Image  Decoding   let dataDecoded NSData   NSData base64EncodedString  strBase64  options  NSDataBase64DecodingOptions rawValue  0     let decodedimage UIImage   UIImage data  dataDecoded    print decodedimage   yourImageView image   decodedimage

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Swift 4 2 Extension method  extension UIImage       func toBase64   - gt  String            guard let imageData   self pngData   else   return nil           return imageData base64EncodedString options  Data Base64EncodingOptions lineLength64Characters            XCode 9 1 and Swift 4 0        Convert UIImage to a base64 representation    class func convertImageToBase64 image  UIImage  - gt  String       let imageData   UIImagePNGRepresentation image       return imageData base64EncodedString options  Data Base64EncodingOptions lineLength64Characters           Convert a base64 representation to a UIImage    class func convertBase64ToImage imageString  String  - gt  UIImage       let imageData   Data base64Encoded  imageString  options  Data Base64DecodingOptions ignoreUnknownCharacters       return UIImage data  imageData

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Swift 3 0 and Xcode 8 0  let imageData   UIImageJPEGRepresentation imageView image   1       let base64String    imageData  as Data  base64EncodedString options  NSData Base64EncodingOptions rawValue  0       print base64String

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Decoding using convenience initialiser - Swift 5 extension UIImage       convenience init  base64String  String            guard let data   Data base64Encoded  base64String  else   return nil           self init data  data

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In Swift 3 0 and Xcode 8 0  Encoding    let userImage UIImage   UIImage named   Your-Image name    let imageData NSData   UIImagePNGRepresentation userImage   as NSData let dataImage   imageData base64EncodedString options   lineLength64Characters    Decoding    let imageData   dataImage let dataDecode NSData   NSData base64Encoded  imageData   options  ignoreUnknownCharacters   let avatarImage UIImage   UIImage data  dataDecode as Data   yourImageView image   avatarImage

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Swift-Extension   extension UIImage       func toBase64   - gt  String            var imageData   UIImagePNGRepresentation self            return imageData base64EncodedStringWithOptions  allZeros

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SWIFT 3 0  XCODE 8 0  Replace String with your URL  and testImage is an outlet of ImageView        Put Your Image URL let url NSURL   NSURL string    http    jpg       It Will turn Into Data let imageData   NSData   NSData init contentsOf  url as URL      Data Will Encode into Base64 let str64   imageData base64EncodedData options   lineLength64Characters     Now Base64 will Decode Here let data  NSData   NSData base64Encoded  str64   options   ignoreUnknownCharacters      turn  Decoded String into Data let dataImage   UIImage data  data as Data     pass the data image to image View    testImage image   dataImage   Hope It Helps Thanks

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I tried all the solutions  none worked for me  using Swift 4   this is the solution that worked for me  if anyone in future faces the same problem   let temp   base64String components separatedBy       let dataDecoded   Data   Data base64Encoded  temp 1   options     ignoreUnknownCharacters   let decodedimage   UIImage data  dataDecoded   yourImage image   decodedimage

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Swift 3 0  To convert image to base64 string   Tested in playground      var logo   UIImage named   image logo       let imageData Data    UIImagePNGRepresentation logo      let base64String   imageData base64EncodedString       print base64String

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Swift 5   class ImageConverter        func base64ToImage   base64String  String  - gt  UIImage            guard let imageData   Data base64Encoded  base64String  else   return nil           return UIImage data  imageData             func imageToBase64   image  UIImage  - gt  String            return image jpegData compressionQuality  1   base64EncodedString

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In Swift 3 0  func decodeBase64 toImage strEncodeData  String  - gt  UIImage        let dataDecoded    NSData base64Encoded  strEncodeData  options  NSData Base64DecodingOptions ignoreUnknownCharacters       let image   UIImage data  dataDecoded as Data      return image

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Swift 4  enum ImageFormat       case png     case jpeg CGFloat     extension UIImage       func base64 format  ImageFormat  - gt  String            var imageData  Data           switch format           case  png  imageData   UIImagePNGRepresentation self          case  jpeg let compression   imageData   UIImageJPEGRepresentation self  compression                     return imageData  base64EncodedString            extension String       func imageFromBase64   - gt  UIImage            guard let data   Data base64Encoded  self  else   return nil            return UIImage data  data

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Swift 4 2   Xcode 10  extension UIImage            EZSE  Returns base64 string     public var base64  String           return self jpegData compressionQuality  1 0   base64EncodedString

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For the Base64 code like    quot data image jpg base64 iVBORw0KGgoAAAANSUhEUgAAAMgAAADIAQAAAACFI5MzAAAB9klEQVR42u2YQYorMQxEBbqWQFc36FoG 6pyOpNZ J20mGGaTiftF2hbLpWU2PnfYX k55Jl5vhUVTu8luUdaCeFcydejjdwDUyQ5XV2JOcSZnkHZgiejusK51QGycrl2yIR1BwjjKivSFz8YC7fY91GKIj6PL5pp4 wWL54t3MHt AjFxoJwmkYwosbh6 UEHE817hvi vGex8gEkTdVRo1 55BM7kjUIgpoMW1DxB6kD GtCX4PUFws40OwcUm0 lRYjOB3pG9YcguBFQuO0ISJ9UIrUP5CKy MriXHDkETYmLDax1 RkgWBglQgUyq6T HCAHBq7iJHd9KWWAlIKoGpiLc6HNDhDkETNYwqeVhym72snKKxA6BJL4UPM5QPYtgGwZeNZ5O0UvgSb0VGdcmVfJCQwQrM pRiGnYJ497SUlv2NOYfOCX3qU2Equ7W3JAslsN7oDBDWWojcZq KbEwQRdRYl1wD3ML52rpGc6w24qCXaKh4DRHWJbUPemqtEGyBMKC4Q QmWiDWzRxkgO1UtSLh3svMaILeDpEGwrwvZ4Bkg9LynK1Y1LJWQdqKGnm3K7VTCz7vS9hIuUyYRd xKcYRIHGqAViisQ4S Uozmqo41Pn6bNRI1xS fk2fMEKpDZYkpjP6B1T0HyN9 Nb M AORXDdE4Lb mQAAAABJRU5ErkJggg   quot   Use Swift5 0 code like  func imageFromBase64   base64  String  - gt  UIImage        if let url   URL string  base64            if let data   try  Data contentsOf  url                return UIImage data  data                      return nil

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For iOS 7   Objective-C  here s how to make the conversion starting with an image URL   NSURL  url    NSURL URLWithString self groove thumbnailURL    UIImage  image    UIImage imageWithData  NSData dataWithContentsOfURL url     NSString  base64String    UIImagePNGRepresentation image  base64EncodedStringWithOptions NSDataBase64Encoding64CharacterLineLength

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Swift 5  Xcode 10    x000D   x000D   let imageData   UIImage named  imagename   pngData    base64EncodedString options   lineLength64Characters  x000D   x000D  print imageData  x000D   x000D   x000D

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implementation UIImage  Extended   -  NSString   base64String       NSData   data    UIImagePNGRepresentation self  base64EncodedDataWithOptions NSDataBase64Encoding64CharacterLineLength       return  NSString stringWithUTF8String  data bytes        end

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Swift First we need to have image s NSData   Use image name from bundle to create NSData let image   UIImage   UIImage named  quot imageNameHere quot      Now use image to create into NSData format let imageData NSData   UIImagePNGRepresentation image      OR next possibility    Use image s path to create NSData let url NSURL   NSURL string    quot urlHere quot      Now use image to create into NSData format let imageData NSData   NSData init contentsOfURL  url    Swift 2 0  gt  Encoding let strBase64 String   imageData base64EncodedStringWithOptions  Encoding64CharacterLineLength   Swift 2 0  gt  Decoding let dataDecoded NSData   NSData base64EncodedString  strBase64  options  NSDataBase64DecodingOptions IgnoreUnknownCharacters    Swift 3 0  gt  Decoding let dataDecoded   Data   Data base64Encoded  strBase64  options   ignoreUnknownCharacters    Encoding   let strBase64   imageData base64EncodedString options   lineLength64Characters  print strBase64   Decoding   let dataDecoded NSData   NSData base64EncodedString  strBase64  options  NSDataBase64DecodingOptions rawValue  0    let decodedimage UIImage   UIImage data  dataDecoded   print decodedimage  yourImageView image   decodedimage  Swift 3 0 let dataDecoded   Data   Data base64Encoded  strBase64  options   ignoreUnknownCharacters   let decodedimage   UIImage data  dataDecoded  yourImageView image   decodedimage   Objective-C iOS7  gt  version You can use NSData s base64EncodedStringWithOptions Encoding   -  NSString   encodeToBase64String  UIImage   image    return  UIImagePNGRepresentation image  base64EncodedStringWithOptions NSDataBase64Encoding64CharacterLineLength      Decoding   -  UIImage   decodeBase64ToImage  NSString   strEncodeData     NSData  data     NSData alloc initWithBase64EncodedString strEncodeData options NSDataBase64DecodingIgnoreUnknownCharacters     return  UIImage imageWithData data       iOS 6 1 and  lt  version First Option   Use this link to encode and decode image Add Base64 class in your project  Encoding    NSData  data   UIImageJPEGRepresentation yourImage  1 0f    NSString  strEncoded    Base64 encode data    Decoding    NSData  data    Base64 decode strEncoded      image image    UIImage imageWithData data    Another Option  Use QSUtilities for encoding and decoding

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Swift iOS8      prgm mark ----      convert images into base64 and keep them into string  func convertImageToBase64 image  UIImage  - gt  String        var imageData   UIImagePNGRepresentation image      let base64String   imageData base64EncodedStringWithOptions  allZeros       return base64String      end convertImageToBase64      prgm mark ----     convert images into base64 and keep them into string  func convertBase64ToImage base64String  String  - gt  UIImage        let decodedData   NSData base64EncodedString  base64String  options  NSDataBase64DecodingOptions rawValue  0         var decodedimage   UIImage data  decodedData        return decodedimage       end convertBase64ToImage

[ios] Convert between UIImage and Base64 string

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