I wonder why didn't you find your question because it's a very old question & can be found here.
Anyways,
You need to first add NSData
categories to your project which are available from here -
header and implementation
Then convert your UIImage
object into NSData
the following way:
NSData *imageData = UIImageJPEGRepresentation(image, 1.0);
And then apply Base64 encoding to convert it into a base64
encoded string:
NSString *encodedString = [imageData base64Encoding];
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