How return a value from view2 to view1 when using navigation bar

Question

I am New to the iPhone Development. How can i carry a string value from view2 to view1 when using navigation bar. I have no problem in carrying string values from view1 to view2 to view3 to....by using pushviewcontroller But when i come back to previous views using Back button of navigation bar, I cannot able to hold string values. I need your help in solving this issue.

Thanks In Advance

Answer 1

This thing can be done easily if the pass the reference of the current class to the next class and change the values by using this reference.

Like: The class that is to be pushed.

@interface B:UIViewController{
   id delegate;
}
@property (nonatomic,retain) id delegate;
@end

@implementation B
@synthesize delegate;

-(void)methodA{
  [delegate setNewString2:@"Madhup"];
}

@end

The class from which you are pushing B:

@interface A:UIViewController{
   NSString *newString;
}
@property (nonatomic,retain)  NSString *newString;
@end


 @implementation A
 @synthesize newString
- (void)method2{
     B *newBObject = .......;
     [newBObject setDelegate:self];
     [self.navigationController pushViewCo.......];
  }
 @end

Hope this helps.