How to Base64 encoding on the iPhone

Question

How do I do Base64 encoding on the iPhone?

I have found a few examples that looked promising, but could never get any of them to work on the phone.

Answer 1

Seems as of iOS 7 you no longer need any libraries to encode in Base64. Following methods on NSData can be used to Base64 encode:

• base64EncodedDataWithOptions: – base64EncodedStringWithOptions:

Answer 2

You can see an example here.

This is for iOS7+.

I copy the code here, just in case:

// Create NSData object
NSData *nsdata = [@"iOS Developer Tips encoded in Base64"
  dataUsingEncoding:NSUTF8StringEncoding];

// Get NSString from NSData object in Base64
NSString *base64Encoded = [nsdata base64EncodedStringWithOptions:0];

// Print the Base64 encoded string
NSLog(@"Encoded: %@", base64Encoded);

// Let's go the other way...

// NSData from the Base64 encoded str
NSData *nsdataFromBase64String = [[NSData alloc]
  initWithBase64EncodedString:base64Encoded options:0];

// Decoded NSString from the NSData
NSString *base64Decoded = [[NSString alloc] 
  initWithData:nsdataFromBase64String encoding:NSUTF8StringEncoding];
NSLog(@"Decoded: %@", base64Decoded);

Answer 3

Download following two files from GitHub

Base64.h
Base64.m

Add these files to your project

Import header file in desired file

#import "Base64.h"

And use as to encode

NSString *plainText = @"Your String";

NSString *base64String = [plainText base64EncodedStringWithWrapWidth:0];

Also you can decode it as

NSString *plainText = [base64String base64DecodedString];