The code
static func encodeImage(image: UIImage) -> String{
var imageData = UIImagePNGRepresentation(image)
let base64 = imageData.base64EncodedStringWithOptions(NSDataBase64EncodingOptions.allZeros)
return base64
}
Does not return the expected output, when the resulting String is decoded in Java or using online tools, the reproduced image is not a valid PNG file
This answer here Base64 encoding in Swift will not decode in Android suggests that the problem is not in the encoding but that the actual PNG is a different format to the one used by Android, iOS seems to use sRGB and Android sBIT
Is there any way to make this work
I have had issues as welll with converting images to base64. But that is due to not all signs get escaped correctly. So I made a small function for it that always works for me:
func imageToBase64(imageToDecode: UIImage!) -> String {
var imageData = UIImageJPEGRepresentation(imageToDecode, 0.8)
var base64String = imageData.base64EncodedStringWithOptions(NSDataBase64EncodingOptions(rawValue: 0))
base64String = base64String.stringByReplacingOccurrencesOfString("+", withString: "%2B", options: NSStringCompareOptions.LiteralSearch, range: nil)
base64String = base64String.stringByReplacingOccurrencesOfString("/", withString: "%2F", options: NSStringCompareOptions.LiteralSearch, range: nil)
return base64String
}