How to Convert Image to Base64Encode String

Question

How to convert Image to base64String.

  UIImage * someImage = [UIImage imageNamed: @"page4.png"];
    NSData *imageData = UIImageJPEGRepresentation(someImage, 1.0);
//    NSString *encodedString = [imageData base64EncodedDataWithOptions:NSDataBase64EncodingEndLineWithLineFeed];
      NSString *base64 = [[NSString alloc] initWithData:imageData encoding:NSUTF8StringEncoding] ;
    if (base64){
       NSLog(@"Base 64 %@",base64);
      }

I the above code gives me empty value for base64 string.

@All Thanks in Advance.

Roberto Ferraz · Accepted Answer · 2014-10-22 08:59:15Z

5

The encoding is not correct..

Try this:

NSString *base64 = [imageData base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];

answered Oct 22, 2014 at 8:59

Roberto Ferraz

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Community · Accepted Answer · 2020-06-20 09:12:55Z

1

Issue

You are getting empty data because you have a .png format of image trying to get data with UIImageJPEGRepresentation

Solution

You need to use UIImagePNGRepresentation

From Apple Developer:

NSData *imageData = UIImagePNGRepresentation (someImage);

P.S UIImagePNGRepresentation has no compression factor, it has just the image parameter

edited Jun 20, 2020 at 9:12

CommunityBot

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answered Oct 22, 2014 at 9:19

Riddie

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Comments

Monikanta · Accepted Answer · 2014-10-22 13:33:39Z

1

//For Encoding
UIImage * someImage = [UIImage imageNamed: @"page4.png"];
NSData *imageData=UIImagePNGRepresentation(someImage);
NSString *base64 = [imageData base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];

// For Decoding
NSData *data=[[NSData alloc]initWithBase64EncodedString:base64 options:NSDataBase64DecodingIgnoreUnknownCharacters];
UIImage *image = [UIImage imageWithData:data];

answered Oct 22, 2014 at 13:33

Monikanta

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