Question

Here is my situation. I have ViewController class A with a button that goes to TableViewController class B by doing the following.

- (void) goToClassB
{
    ViewControllerB *viewController =
    [[ViewControllerB alloc] initWithStyle:UITableViewStylePlain];
    // Present view controller modally.
    if ([self
        respondsToSelector:@selector(presentViewController:animated:completion:)]) {
        [self presentViewController:viewController animated:YES completion:nil];
    } else {
        [self presentModalViewController:viewController animated:YES];
    }
}

I want to be able to have an array that can be accessed and edited by both class A and class B. How can I achieve this?

Answer 1

Create a Array variable in Class B like:

@interface classB:NSObject
{
  NSMutableArray *arrayFromA;
}
@property (nonatomic, assign)  NSMutableArray *arrayFromA;

Synthesize the variable.

And in this method pass the array like:

- (void) goToClassB
{
   ViewControllerB *viewController = [[ViewControllerB alloc] initWithStyle:UITableViewStylePlain];
   [viewController setArrayFromA:yourArray];
   // Present view controller modally.
   if ([self
     respondsToSelector:@selector(presentViewController:animated:completion:)])
    {
     [self presentViewController:viewController animated:YES completion:nil];
    }
    else
    {
      [self presentModalViewController:viewController animated:YES];
    }
}