Convert NSData to a string of bits : "001100111001110011" ... Useful for debugging

gistfile1.m

//.h
@interface NSData (BinaryString)

- (NSString*)toBinaryString;

@end

//.m
@implementation NSData (BinaryString)

- (NSString*)toBinaryString
{
    NSMutableString* output = @"";
    for (int i = 0; i < [self length]; i++) {
        for (int j = 7; j >= 0; j--) {
            output = [output appendFormat:@"%d", ((((const unsigned char*)[self bytes])[i] >> j) & 0x1)];
        }
    }
    return output;
}

@end