hexadecimal to nsuinteger cocoa

Question

Hi,

How can i convert a Hexadecimal number to a nsuinteger

Answer 1

Here's one solution which uses the libc funtion sscanf(),

Answer 2

strtoul(s, NULL, 16);

Answer 3

You can use NSScanner if your hex number is in an NSString:

NSScanner* scanner = [NSScanner scannerWithString:@"0xFF"];
unsigned int foo;
[scanner scanHexInt:&foo];
NSLog(@"Integer: %ld",foo);
scanner = [NSScanner scannerWithString:@"FF"];
[scanner scanHexInt:&foo];
NSLog(@"Integer: %ld",foo);

Admittedly, this doesn't scan directly to an NSUInteger, you'd need to cast the result, but it should be enough for your purposes.

Answer 4

In Rob's code snippet above, the code is unnecessarily duplicated.