CODEWITHSUNDEEP
iosobjective-cdelegatesprotocols
Jessica
Jessica

Reputation: 9830

Setting the delegate from third to first viewController

I have three viewControllers. When I'm on the third view controller I want to send a message to the first one. I'm using a protocol and trying to set the delegate for this.

viewControllerC.h

@protocol ViewControllerCDelegate

- (void)performAction;

@end

...
@property (nonatomic, strong) id<ViewControllerCDelegate> delegate;

viewControllerA.h

@interface ViewControllerA : UIViewController <ViewControllerCDelegate>

viewControllerA.m

...
- (void)performAction {
    NSLog(@"Action was performed");
}

So the only problem is, I can't set the delegate from the third to the first. How can I set viewControllerC's delegate to viewControlerA?

Here's an image to describe it:

enter image description here

Upvotes: 1

Views: 584

Answers (1)

Brandon Campbell
Brandon Campbell

Reputation: 394

You'd have to pass along the A controller through to the B controller to be set as the delegate for C when it is created. Kind of messy.

In this case though it might make more sense to use a notification model where Controller A listens for a NSNotification that the action was completed on C.

Upvotes: 3

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