Convierte entre UIImage y Base64 string

¿Alguien sabe cómo convertir un UIImage a una cadena Base64 y luego invertirlo?

Tengo el siguiente código; la imagen original antes de la encoding es buena, pero solo obtengo una imagen en blanco después de codificarla y decodificarla.

 NSData *imageData = UIImagePNGRepresentation(viewImage); NSString *b64EncStr = [self encode: imageData]; NSString *base64String = [self encodeBase64:imageData]; 

Rápido

Primero necesitamos tener NSData de la imagen

 //Use image name from bundle to create NSData let image : UIImage = UIImage(named:"imageNameHere")! //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 : "urlHere")! //Now use image to create into NSData format let imageData:NSData = NSData.init(contentsOfURL: url)! 

Swift 2.0> Codificación

 let strBase64:String = imageData.base64EncodedStringWithOptions(.Encoding64CharacterLineLength) 

Swift 2.0> Deencoding

 let dataDecoded:NSData = NSData(base64EncodedString: strBase64, options: NSDataBase64DecodingOptions.IgnoreUnknownCharacters)! 

Swift 3.0> Deencoding

 let dataDecoded : Data = Data(base64Encoded: strBase64, options: .ignoreUnknownCharacters)! 

Codificación :

 let strBase64 = imageData.base64EncodedString(options: .lineLength64Characters) print(strBase64) 

Deencoding :

 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 

C objective

iOS7> versión

Puede usar NSData's base64EncodedStringWithOptions

Codificación :

 - (NSString *)encodeToBase64String:(UIImage *)image { return [UIImagePNGRepresentation(image) base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength]; } 

Deencoding :

 - (UIImage *)decodeBase64ToImage:(NSString *)strEncodeData { NSData *data = [[NSData alloc]initWithBase64EncodedString:strEncodeData options:NSDataBase64DecodingIgnoreUnknownCharacters]; return [UIImage imageWithData:data]; } 

iOS 6.1 y

Primera opción : utilice este enlace para encode y decode imagen

Agrega la clase Base64 en tu project .

Codificación :

  NSData* data = UIImageJPEGRepresentation(yourImage, 1.0f); NSString *strEncoded = [Base64 encode:data]; 

Deencoding :

  NSData* data = [Base64 decode:strEncoded ];; image.image = [UIImage imageWithData:data]; 

Otra opción : usar QSUtilities para encoding y decoding


SWIFT 3.0, XCODE 8.0

Reemplace la cadena con su URL. y testImage es una salida de 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 

Espero ayuda Gracias.

XCode 9.1 y Swift 4.0

 // // Convert String to base64 // class func convertImageToBase64(image: UIImage) -> String { let imageData = UIImagePNGRepresentation(image)! return imageData.base64EncodedString(options: Data.Base64EncodingOptions.lineLength64Characters) } // // Convert base64 to String // class func convertBase64ToImage(imageString: String) -> UIImage { let imageData = Data(base64Encoded: imageString, options: Data.Base64DecodingOptions.ignoreUnknownCharacters)! return UIImage(data: imageData)! } 

Swift iOS8

 // prgm mark ---- // convert images into base64 and keep them into string func convertImageToBase64(image: UIImage) -> 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) -> UIImage { let decodedData = NSData(base64EncodedString: base64String, options: NSDataBase64DecodingOptions(rawValue: 0) ) var decodedimage = UIImage(data: decodedData!) return decodedimage! }// end convertBase64ToImage 
 @implementation UIImage (Extended) - (NSString *)base64String { NSData * data = [UIImagePNGRepresentation(self) base64EncodedDataWithOptions:NSDataBase64Encoding64CharacterLineLength]; return [NSString stringWithUTF8String:[data bytes]]; } @end 

En swift 2.0 usa esta extensión (crédito a Jonas Franz)

 extension UIImage{ func toBase64() -> String{ let imageData = UIImagePNGRepresentation(self)! return imageData.base64EncodedStringWithOptions(.Encoding64CharacterLineLength) } } 

Swift 3.0

Para convertir la imagen a la cadena base64

Probado en el patio de recreo

  var logo = UIImage(named: "image_logo") let imageData:Data = UIImagePNGRepresentation(logo) let base64String = imageData.base64EncodedString() print(base64String) 

En Swift 3.0 y Xcode 8.0

Codificación:

 let userImage:UIImage = UIImage(named: "Your-Image_name")! let imageData:NSData = UIImagePNGRepresentation(userImage)! as NSData let dataImage = imageData.base64EncodedString(options: .lineLength64Characters) 

Deencoding:

 let imageData = dataImage let dataDecode:NSData = NSData(base64Encoded: imageData!, options:.ignoreUnknownCharacters)! let avatarImage:UIImage = UIImage(data: dataDecode as Data)! yourImageView.image = avatarImage 

Swift-Extensión:

 extension UIImage{ func toBase64() -> String{ var imageData = UIImagePNGRepresentation(self) return imageData.base64EncodedStringWithOptions(.allZeros) } } 
 See my class - AppExtension.swift // MARK: - UIImage (Base64 Encoding) public enum ImageFormat { case PNG case JPEG(CGFloat) } extension UIImage { public func base64(format: ImageFormat) -> String { var imageData: NSData switch format { case .PNG: imageData = UIImagePNGRepresentation(self) case .JPEG(let compression): imageData = UIImageJPEGRepresentation(self, compression) } return imageData.base64EncodedStringWithOptions(.allZeros) } } 

Versión de Swift: crea base64 para la imagen

En mi opinión, Implicitly Unwrapped Optional en el caso de UIImagePNGRepresenatation() no es seguro, por lo que recomiendo usar la extensión como a continuación:

 extension UIImage { func toBase64() -> String? { let imageData = UIImagePNGRepresentation(self) return imageData?.base64EncodedStringWithOptions(NSDataBase64EncodingOptions.Encoding64CharacterLineLength) } } 

En Swift 3.0

 func decodeBase64(toImage strEncodeData: String) -> UIImage { let dataDecoded = NSData(base64Encoded: strEncodeData, options: NSData.Base64DecodingOptions.ignoreUnknownCharacters)! let image = UIImage(data: dataDecoded as Data) return image! } 

Swift 4

Codificación

 func ConvertImageToBase64String (img: UIImage) -> String { let imageData:NSData = UIImageJPEGRepresentation(img, 0.50)! as NSData //UIImagePNGRepresentation(img) let imgString = imageData.base64EncodedString(options: .init(rawValue: 0)) return imgString } 

Desencoding

 func ConvertBase64StringToImage (imageBase64String:String) -> UIImage { let imageData = Data.init(base64Encoded: imageBase64String, options: .init(rawValue: 0)) let image = UIImage(data: imageData!) return image } 

Nota: probado en xcode 9.4.1

Para iOS 7+, Objective-C, a continuación se explica cómo hacer que la conversión comience con una URL de imagen:

 NSURL *url = [NSURL URLWithString:self.groove.thumbnailURL]; UIImage *image = [UIImage imageWithData:[NSData dataWithContentsOfURL:url]]; NSString *base64String = [UIImagePNGRepresentation(image) base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength]; 

Swift 3.0 y Xcode 8.0

 let imageData = UIImageJPEGRepresentation(imageView.image!, 1) let base64String = (imageData! as Data).base64EncodedString(options: NSData.Base64EncodingOptions(rawValue: 0)) print(base64String) 

Probé todas las soluciones, ninguna funcionó (usando Swift 4), esta es la solución que funcionó para mí, si alguien en el futuro enfrenta el mismo problema.

 let temp = base64String.components(separatedBy: ",") let dataDecoded : Data = Data(base64Encoded: temp[1], options: .ignoreUnknownCharacters)! let decodedimage = UIImage(data: dataDecoded) yourImage.image = decodedimage