Access property from outside a class in objective c

Question

How can I set an property from outside an Objective C class?

I have a class called MyCtlr and in the MyCtrl.h I declared a variable called status like this:

@interface RejectController : UIViewController{
    IBOutlet UICustomLabel *lblMessage;
}

@property NSInteger status;

@end

Then I want to set it in another class to a specific value like this:

    MyCtrl *myCtrl = [self.storyboard instantiateViewControllerWithIdentifier:@"MyCtrlIdentify"];
    [myCtrl status:2]; //here triggers the error: No visible @interface for 'MyCtrl' declares the selector 'status:'

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

but as soon as I try to set a value to status I get the error: No visible @interface for 'MyCtrl' declares the selector 'status:'

Does anyone know why?

Wain · Accepted Answer · 2015-11-11 09:43:21Z

4

When using a property, accessor methods are created for you. So you should either be doing:

[myCtrl setStatus:2];

or

myCtrl.status = 2;

answered Nov 11, 2015 at 9:43

Wain

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4 Comments

Stubenhocker.tech Over a year ago

cool, seems to work, but where does the setStatus function come from? I never declared it? and is there a difference between this two methods?

Wain Over a year ago

You need to read about properties and what they do for you (define memory storage and accessor methods to that storage, with access logic)

Stubenhocker.tech Over a year ago

okay thanks! Would be great if you could provide me a link. Most stuff I found is very outdated.

Wain Over a year ago

probably not outdated, it hasn't changed, swift makes life a bit different but obj-c is explicit about the options

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