cocoa - ARC: How do you release a WindowController when the user closes the Window? -

i'm trying translate old code arc. old code in windowcontroller:

@interface preferencescontroller () <nswindowdelegate>  @end  @implementation preferencescontroller      -(void)windowwillclose:(nsnotification*) notification {          [self autorelease];     }  @end 

my appdelegate has strong pointer windowcontroller:

@property(strong) preferencescontroller* preferencesctrl; 

in preferencescontroller, need declare (weak) pointer appdelegate, , this:

-(void) windowwillclose:(nsnotification *)notification {      [[self appdelegate] setpreferencesctrl:nil];  } 

well, thoughts right.

but can give make more simple.

set application delegate nswindowdelegate.

@interface appdelegate : nsobject <nsapplicationdelegate, nswindowdelegate>  @property (strong) preferencescontroller* preferencesctrl;  @end  @implementation appdelegate  - (void)doaction {   // create window   // ...   self.preferencesctrl.window.delegate = self; // set window delegate }  - (void)windowwillclose:(nsnotification *)notification    {    self.preferencesctrl=nil;   }  @end 

upd since using nswindowdelegate methods, suggest create delegate protocol, preferencecontrollerdelegate

//in preferencecontroller.h before class interface @class preferencecontrollerdelegate  @protocol preferencecontrollerdelegate <nsobject>  - (void)preferencecontrollerwindowwillclose:(preferencecontrollerdelegate *)sender;  @end   @interface preferencecontroller : nswindowcontroller  //...  @property (nonatomic,weak) id<preferencecontrollerdelegate> delegate;  //...  @end 

that proper.