Question

I have to pass a boolean value from a ViewControllerA to ViewControllerB. In ViewControllerA I put as a property:

 @property (nonatomic, assign)BOOL fromViewControllerA;

Then open ViewControllerB:

   ViewControllerB * viewControllerB = [[ViewControllerB alloc]initWithNibName:@"ViewControllerB" bundle:nil];

    self.fromRootViewController = YES;

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

In ViewControllerB I imported ViewControllerA and I created the property:

   @property (nonatomic, strong) ViewControllerA *viewControllerA

later in ViewDidLoad()

    if (viewController.fromViewController){
       //.......
    }

does not work. Why?

Answer 1

create a BOOL property in viewController B say..BOOL setFlag; synthesize it in ViewController B,

Now in ViewController A where you perform push

 ViewControllerB * viewControllerB = [[ViewControllerB alloc]initWithNibName:@"ViewControllerB" bundle:nil];

    self.fromRootViewController = YES;
    viewControllerB.setFlag = YES;  //set the value here 

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