title: Cocoa / Objective-C: Draw Rectangle on Button Click
body: <p>Hellow stackoverflow people,
  I am pretty new to Cocoa. I have XCode 3.1</p>
  
  <p>Situation:
  I have a NSObject subclass: (AppController) with an action, linked to a button.
  Than i have a custom View, connected to my NSView subclass (AppView), in the drawRect command i draw a rectangle (all that stuff works),
  i have in the AppView.m a function - (void) drawIt { .. } which draws the rectangle.
  For now i called it in the - (void) drawRect ... with [self drawIt]. That works too.</p>
  
  <p>What i want to do now is to call drawIt when the button is clicked. (in the AppController.m when the Action -(IBAction) ... is called due to a button Click)</p>
  
  <p>I hope u can help me, 
  I am new to stackoverflow so i dont know wether i should past all the code here, i can but maybe its easier to read like this</p>