Question

Possible Duplicate:
Objective C defining UIColor constants

I’d like to use few colours throughout my app. Instead of creating a UIColor at every instance or in every viewController is there a way by which i can use it throughout the app.

or is it wise to use a ColourConstants.h header file where i #define each colour i want to use

i.e

#define SCARLET [UIColor colorWithRed:207.0/255.0 green:47.0/255.0 blue:40.0/255.0 alpha:1];

thanks in advance!

Answer 1

I would use a category on UIColor. For example:

// In UIColor+ScarletColor.h

@interface UIColor (ScarletColor)

+ (UIColor*)scarletColor;

@end


// In UIColor+ScarletColor.m

@implementation UIColor (ScarletColor)

+ (UIColor*)scarletColor {
    return [UIColor colorWithRed:207.0/255.0 green:47.0/255.0 blue:40.0/255.0 alpha:1];
}

@end

And when you want to use the color you only have to do this:

#import "UIColor+ScarletColor.h"

....

UIColor *scarlet = [UIColor scarletColor];

Hope it helps!!