Question

I am using this code from a guy

in the middle of this code, we have

- (NSString *)hexStringFromColor {
        return [NSString stringWithFormat:@"%0.6X", self.rgbHex];
}

This was working fine until Xcode 4.4. Now, I see this error:
format specifies type unsigned int but the argument has type UInt32 (aka unsigned long).

Why is Xcode complaining in 4.4 but not before? what specifier should I use?

thanks.

Answer 1

Since rgbHex seems to be an unsigned long, the correct format specifier is @"%0.6lX" where l stands for long.

List of iOS String Format Specifiers.