Best way to pass back data from hierarchical table view?

Question

Hi,
I have a view hierarchy using a navigation controller that's working pretty well. One of the bottom level views is a table view where the user selects an item from the list. This bottom view checks the list item, saves the selected item in a property, and then pops the view off the stack.
What's the best way to alert the parent view that the child view has been popped off so it can retrieve the value in the property? The calling push returns immediately, so it doesn't appear to be a modal call. I want to be able to use the same controller from other parent forms, so I need to be able to do this without referencing the parent in the child form ideally.
Thanks
Ray

Answer 1

Hi, well let me try to explain it a bit more
- Add a "delegate" property to your child-viewcontroller-class
- Define a protocoll within each chil-viewController-class
In this example let us name it "didSelectValue:(NSString *)value"
- In the parent-viewcontroller before pushing a child-viewcontroller set it's delegate property to "self" (parent-viewcontroller)
- In the parent-viewcontroller implement to protocoll-method "didSelectValue:(NSTring *)value"
- In the child view-controller in (assuming it is a tableViewcontroller) add some code in didSelectRowAtIndexPath that checks if the delegate is set and check if it responds to selector "didSelectValue:(NSString *)value". If so, call it with the selected value.