NSData in base 10

Question

Is it possible to NSLog NSData in base 10. Basically to see byte array of NSData.

I would like to see output something like this: [51, -55, 55, -54, -110]

And what have you tried? It is really trivial if you have read the documentation for `NSLog()`. — , Aug 14 '13 at 12:53
In general, hexadecimal output is more appropiate for binary data. — Sulthan, Aug 14 '13 at 12:54
@duDE it is not duplicate. My question was not how to print NSData. — sash, Aug 14 '13 at 13:43

score 4 · Accepted Answer · edited Aug 14 '13 at 13:20

4

You can define a category on NSData to produce a string with decimal data representation, like this:

@interface NSData (DecimalOutput)
-(NSString*)asDecimalString;
@end
@implementation NSData (DecimalOutput)
-(NSString*)asDecimalString {
    NSMutableString *res = [NSMutableString string];
    [res appendString:@"["];
    // Construct an `NSString`, for example by appending decimal representations
    // of individual bytes to the output string
    const char *p = [self bytes];
    NSUInteger len = [self length];
    for (NSUInteger i = 0 ; i != len ; i++) {
        [res appendFormat:@"%i ", p[i]];
    }
    [res appendString:@"]"];
    return res;
}
@end

Now you can use this to NSLog strings in the new format:

NSLog("Data:%@", [myData asDecimalString]);

edited Aug 14 '13 at 13:20

Sulthan

128,090
22
218
270

answered Aug 14 '13 at 13:00

Sergey Kalinichenko

714,442
84
1,110
1,523

Excuse me, but I don't think it's the "create a category" idea that OP is missing - it's rather the `appendFormat:@"%d ", ((const char *)data.bytes)[i]]` part. – Aug 14 '13 at 13:03
@H2CO3 I'm not that fast at typing :) – Sergey Kalinichenko Aug 14 '13 at 13:05
Ah OK :) Cheating, huh? :P (still `const char *`, btw.) – Aug 14 '13 at 13:14
@H2CO3 Ninja edits are perfectly fine - they are one of the more exciting parts of being on Stack Overflow :) – Sergey Kalinichenko Aug 14 '13 at 13:18

NSData in base 10

1 Answers1