how to pass a variable value to another view properly

i have two views MainView and MainInvoicing

from MainView i am sending a int type variable value to MainInvoicing

this is my code

in MainInvoicing.h file i declared int type var

@property (nonatomic, assign) int myChoice;

in MainView.m file on a button click i am calling the MainInvoicing as

MainInvoicing *invoicing = [[MainInvoicing alloc] initWithNibName:@"Invoicing" bundle:nil];
[self presentViewController:invoicing animated:YES completion:nil];
invoicing.myChoice = 1;

from this my MainInvoicing is called perfectly, but myChoice is equal to zero '0'. while it should be '1'

i am receiving this value in MainInvoicing.m as

- (void)viewDidLoad
{
[super viewDidLoad];
[self Start];
}

and the start method is

- (void) Start
{
switch (myChoice)
{
    case 1:
        NSLog(@"value is %d",myChoice);
        break;
    case 2:
        NSLog(@"value is %d",myChoice);
        break;
    default:
        NSLog(@"Oooopppss...%d",myChoice);
        break;
}
}

i am always on default part ….

where am i wrong or any suggestion to get the right value … please help…

You should assign value before you present view controller:

 MainInvoicing *invoicing = [[MainInvoicing alloc] initWithNibName:@"Invoicing" bundle:nil];
invoicing.myChoice = 1;
[self presentViewController:invoicing animated:YES completion:nil];