StackOverflow2013

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plurals

PO
primarykey
Id
1396039
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2009-09-08T20:05:10.120
FavoriteCount
0
LastActivityDate
2009-09-08T20:53:14.093
LastEditDate
2009-09-08T20:53:14.093
LastEditorUserId
19410
OwnerUserId
19410
ParentId
1395968
PostTypeId
2
Score
1
ViewCount
0
LastEditorDisplayName
text
Body
There are a few variants of this floating around that extend <code>NSString</code> or <code>NSData</code> through the use of Objective-C categories. Here's one example that I have added to my "utilities" toolbox: Header: <pre><code>#import <Foundation/NSString.h> @interface NSString (Utilities) + (NSString *) base64StringFromData:(NSData *)data; @end </code></pre> Implementation: <pre><code>#import "NSString+Utilities.h" @implementation NSString (Utilities) + (NSString *) base64StringFromData:(NSData *)data { static const char encodingTable[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; if ([data length] == 0) return @""; char *characters = malloc((([data length] + 2) / 3) * 4); if (characters == NULL) return nil; NSUInteger length = 0; NSUInteger i = 0; while (i < [data length]) { char buffer[3] = {0,0,0}; short bufferLength = 0; while (bufferLength < 3 && i < [data length]) buffer[bufferLength++] = ((char *)[data bytes])[i++]; // Encode the bytes in the buffer to four characters, including padding "=" characters if necessary. characters[length++] = encodingTable[(buffer[0] & 0xFC) >> 2]; characters[length++] = encodingTable[((buffer[0] & 0x03) << 4) | ((buffer[1] & 0xF0) >> 4)]; if (bufferLength > 1) characters[length++] = encodingTable[((buffer[1] & 0x0F) << 2) | ((buffer[2] & 0xC0) >> 6)]; else characters[length++] = '='; if (bufferLength > 2) characters[length++] = encodingTable[buffer[2] & 0x3F]; else characters[length++] = '='; } return [[[NSString alloc] initWithBytesNoCopy:characters length:length encoding:NSUTF8StringEncoding freeWhenDone:YES] autorelease]; } @end </code></pre> Example usage: <pre><code>NSString *inputString = @"myInputString"; NSLog(@"%@", [NSString base64StringFromData:[inputString dataUsingEncoding:NSUTF8StringEncoding]]); </code></pre>
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POCocoa Base 64 Implementation for REST Auth
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. USAlex Reynolds
UserOwnerUserId
1. USAlex Reynolds
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. This table or related slice is empty.
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
CommentsPostId
1. This table or related slice is empty.

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