Question

I read a NSString from file and then I want to #define this as a UIColor so I can quickly change color’s.

I want something to work like so:

#define GRAY [UIColor darkGrayColor]

Then read from file the string : @”GRAY” and put it in a NSString variable called kColor

And then paste this onto a backgroundcolor property like so:

myController.view.backgroundColor = kColor;

now this means I get :

myController.view.backgroundColor = @"GRAY";

I need:

myController.view.backgroundColor = GRAY;

for the #define to work. So how do i remove @”” from the string or typecast the string into a variable name? I’m not stuck on #define so if there is another way to get this to work, I’m open to that.

Help is greatly appreciated.

Answer 1

You could load the colors into a NSDictionary.

// Put this in some global scope
NSDictionary *colors = [NSDictionary dictionaryWithObjectsAndKeys: 
    [UIColor darkGrayColor], @"GRAY", nil];

// using the dictionary
myController.view.backgroundColor = [colors objectForKey:kColor];