int value changed to zero after popViewController

Question

I've two view controllers say A & B

In A.h I am doing

{
    int cId;
    bool selected;
}

@property (readwrite) int cId;

In A.m I am doing

@synthesize cId;

- (void) viewWillAppear : (BOOL) animated
{
   //It will only call if its popBacked
   if(selected==YES) //I set it to YES some where in my A.m and its push to : B
   {
      selected=NO;
      NSLog(@"%d",cId); //getting 0 (zero)
   }
}

In B.m I am doing

#import "A.h"

- (void) sentBack : (int) cIdValue
{
    A *obj=[A alloc] init];
    obj.cId=cIdValue;
    NSLog(@"%d",obj.cId); //Its print properly
   [self.navigationController popViewControllerAnimated:YES];
}

My problem is, when I pop back its value changes and set to 0 (zero). So I can't access my correct cId. Why it is changes? What I am doing wrong? Any help, suggestion is helpful. Thanks in advance.

Answer 1

//Edited your code of B.m

#import "A.h"

- (void) sentBack : (int) cIdValue {
   if([[self.navigationController viewControllers] count]>0) {                
               A *AViewCont=[[self.navigationController viewControllers] objectAtIndex:0];
              AViewCont.cId=cIdValue;
              [self.navigationController popViewControllerAnimated:YES];
          }
}

Try this one may help you.