objective c - NSWindowController and isWindowLoaded -

I have an NSWindowController and I start it this way;

  + (MyWindowController *) Shared Controller {Static MyWindowController * singleton = Zero; If (single!) Singleton = [[Self Alok] initWithWindowNibName: @ "myWindow"]; Return singleton; }  

And I show windows like this;

  [[Myvando Controller Shared Controller] showWindow: nil];  

The problem is now that I need information from some controls on that window but I do not want to load the window, if it has not been loaded yet, because I just missed it Can I use WindowLoaded? @TotalTools to access property? Or what is recommended here? (If @property, please give me only read-only, non-verifiable attributes.)

Do not Store Models Data Controller (probably not myvando controller, but the data that needs data) is itself real data (if any) in the views and fill any defaults.

In the interface builder, the values ​​that you fill in should not do anything else, for example, if I know that a field should have a number whose value is ± 50000, then I enter "-50000" And accordingly, the area will take shape, and we will leave "-50000" there. The actual default is 0 or something more likely to happen, and I would have been provided by the controller who owns the value (or, if the field shows the property of a model object, then the default object given by each new model) .