using global array or other better design

for the consistence of the app,I hava declared some const string in global.h:

extern NSString *const GDD_UI_COMFIRM_TITLE;//comfirm button title
extern NSString *const GDD_UI_CANCELL_TITLE;//cancell button title

and defined them in global.m:

NSString *const GDD_UI_COMFIRM_TITLE = @"ok";
NSString *const GDD_UI_CANCELL_TITLE = @"cancel";

Now,I need a global array like:

NSArray *GDD_STATUS_CONFIG = @[ @{
                                    @"title":@"a",
                                    @"color":[UIColor redColor]
                                },
                                @{
                                   @"title":@"b",
                                   @"color":[UIColor grayColor]
                                }];

I want to access the array the way just like the global const string so that the code could look consistent,but it will be error if I declare and define the array in global.h/.m. someone suggest to use a class to wrap the array,but it meet my consistent requirement. btw,I heard someone say it is not a good idea to use global variable,is there any substitute of global variable?

THX.