Question

I’m having some trouble calling a method in a different view controller.

Here’s my setup:
ViewController1 -> ViewController2 -> ViewController3

ViewController1 calls ViewController2 using a WEPopoverController invocation:

UIViewController2 *viewCon2 = [[UIViewController2 alloc] init];

navPopover = [[WEPopoverController alloc] initWithContentViewController:viewCon2];
[navPopover presentPopoverFromRect:CGRectMake(0, 0, 50, 57)
                               inView:self.view
             permittedArrowDirections:UIPopoverArrowDirectionUp | UIPopoverArrowDirectionDown
                             animated:YES];

I would like ViewController3 to be able to call a method that exists within ViewController1. Since ViewController3 is not directly initialized from ViewController1, I couldn’t figure out how to use the delegate method to call ViewController1’s method.

Any ideas?

Answer 1

in your ViewController1 vieDidLoad add the line ..

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(methodFromViewController3) name:@"Message" object:nil];

( do remove the observer in dealloc)

then when you want to call the method in view 1 from viewcontroler 3..
Post the notification

[[NSNotificationCenter defaultCenter] postNotificationName:@"Message"  object:nil userInfo:nil];

When you post the notification methodFromViewController3 method is called in first view ( you have to add that in the view controller)… in your case.. you can just change it to the name of existing method that you would like to call..