Change the text of the back button in navigationbar

_backButtonInNavigation.md

##Back button'text in navigationbar ###Objective-C

gistfile1.m

UIViewController *controller = [[UIViewController alloc] initWithNibName:@"view" bundle:nil];
UIBarButtonItem *backItem = [[UIBarButtonItem alloc] initWithTitle:@"back" style:UIBarButtonItemStyleBordered target:nil action:nil];
[self.navigationItem setBackBarButtonItem:backItem];

[self.navigationController pushViewController:controller animated:YES];