access an integer and string globally in iphone?

Question

i want to access a integer and a string from a class to all the other classes? what is the best way to do it? i want to increase the values any where in the program and then want to update them in the class declared....

any idea how to achieve this???

Answer 1

You could make the integer and string properties of your app delegate and pass references to the delegate around to your views. I do something like this myself, though to be honest it is a pain and also a little error prone to make the app delegate available to all the views.

Or (and this is probably better), you could declare a singleton class (google the singleton pattern) as one of your data classes, and have your integer/string be properties of that. Then you could access the getters/setters of your singleton from anywhere in your program. You will need to take extra care if you have multiple threads however,

Answer 2

Here's a question (and good answers) about singletons.

You could also use the app delegate, as frankodwyer suggested, and access it from anywhere using:

id delegate = [[UIApplication sharedApplication] delegate];

For ease of use and type safety I use a category like this:

// put his in your delegate header file
@interface UIApplication(MyAppAdditions)
+ (MyAppDelegate*)sharedDelegate;
@end

// put his in your delegate implementation file
@implementation UIApplication(MyAppAdditions)
+ (MyAppDelegate*)sharedDelegate {
    return (MyAppDelegate*)[[self sharedApplication] delegate];
}
@end

Now you can access your app delegate from everywhere: [UIApplication sharedDelegate]