Convert Between Uiimage and Base64 String

Convert between UIImage and Base64 string

Swift

First we need to have image's NSData

//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 > Encoding

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

Swift 2.0 > Decoding

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

Swift 3.0 > 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 > 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 < 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

---

Convert UIImage to base64 string in swift

Do it something like this:

For Encoding:

data.base64EncodedStringWithOptions([])

For decoding:

let url = URL(string: String(format:"data:application/octet-stream;base64,%@",base64String))
do {
    let data =  try Data(contentsOf: url!)
}catch {

}

Decode a base64 data to image

Instead of using NSData use directly Swift 3 native Data.

if let decodedData = Data(base64Encoded: mediaFile, options: .ignoreUnknownCharacters) {
    let image = UIImage(data: decodedData)
}

Converting Image to BASE64 String in swift

Actually it will not take time to convert but for printing, it will take more time so don't print it...

Base64 string to UIImage Issue

Your Base64 string

%2F9j%2F4AAQSk...Z2uHi4%2BTl5ufo6...jtTGf%2FZ

contains "percent-encoded hexadecimal sequences",
such as "%2F" for "/", or "%2B" for "+".

That is a variant used in URL applications, but Data does not handle it automatically. Therefore you have to remove the
percent encodings first:

if let percentDecoded = base64String.removingPercentEncoding,
    let decodedData = Data(base64Encoded: percentDecoded) {
    // ...
}

---

Related Topics