can i use to pass a data with 'navigation controller back button' in xcode

问题

i have 2 view controller and a navigation controller . we shall say main for 1 and detail for 2. when i push button in main, detail opens and main opens with back button

well, i want to change a label text or a string in main view controller when i clicked a button and back button on detail view controller.

how can i make this?

if([segue.identifier isEqualToString:@"deneme"])
{
MainViewController *main=[segue destinationViewController];
main.detay=@"denme";

}

i tried prepareForSegue and function that i wrote but i couldn't.

回答1:

"koediseps"

i have written a demo for passing data for you, download it and check it. if you found any problem , ask me.

here is the link for data passing with delegate demo

some other useful link simple-delegate-tutorial-for-ios-development

passing-data-using-delegates-between-viewcontrollers

来源：https://stackoverflow.com/questions/23791199/can-i-use-to-pass-a-data-with-navigation-controller-back-button-in-xcode