Memory leak using NSWindowController showWindow:

I’ve been struggling with the next topic for some time. I narrowed it down through Tools to the next block of code:

- (NewMessageWindowController *)showNewMessageWindowWithRecipients:(NSArray *)recipients {

    NewMessageWindowController * newMessageWindowController = [[NewMessageWindowController alloc] init];
    [newMessageWindowController showWindow:self]; // 100% on this line.
    [newMessageWindowController.toField setStringValue:[recipients componentsJoinedByString:@","]];
    [newMessageWindowController.messageView becomeFirstResponder];
    [windowControllers addObject:newMessageWindowController];
    [newMessageWindowController release];

    return newMessageWindowController;
}

The block is called like this:

[AppDelegate showNewMessageWindowWithRecipients:[NSArray arrayWithObject:recipient]];

Where recipientis just an NSString.

And here is the flip side of the tools:

  30 Friendz start
  29 AppKit NSApplicationMain
  28 AppKit -[NSApplication run]
  27 AppKit -[NSApplication sendEvent:]
  26 AppKit -[NSWindow sendEvent:]
  25 AppKit -[NSWindow keyDown:]
  24 AppKit forwardMethod
  23 Friendz -[FriendzAppDelegate showNewMessageWindowWithRecipients:] /Path/To/FriendzAppDelegate.m:226
  22 AppKit -[NSWindowController showWindow:]
  21 AppKit -[NSWindow makeKeyAndOrderFront:]
  20 AppKit -[NSWindow _makeKeyRegardlessOfVisibility]
  19 AppKit -[NSWindow _changeKeyAndMainLimitedOK:]
  18 AppKit -[NSWindow becomeKeyWindow]
  17 AppKit _NXResetCursorState
  16 AppKit +[NSEvent _discardCursorEventsForWindowNumber:criteria:]
  15 HIToolbox FlushSpecificEventsFromQueue
  14 HIToolbox PullEventsFromWindowServer
  13 HIToolbox PullEventsFromWindowServerOnConnection(unsigned int, unsigned char)
  12 HIToolbox ConvertPlatformEventRecordAndPostWithOptions(__CGEvent*, _CGSEventRecord const*, short, unsigned char, unsigned char)
  11 HIToolbox PostEventToQueueInternal
  10 HIToolbox _NotifyEventLoopObservers
   9 HIToolbox KeyEventPostedObserver
   8 HIToolbox TSMProcessRawKeyCode
   7 HIToolbox TSMTranslateKeyEvent
   6 HIToolbox GetDataFromUCHRForEvent
   5 HIToolbox ConvertEventUniCharsToCharCodes
   4 HIToolbox utGetInputSourceScriptInfo
   3 CoreFoundation CFLocaleCreateCanonicalLocaleIdentifierFromScriptManagerCodes
   2 CoreFoundation CFStringCreateWithCStringNoCopy
   1 CoreFoundation __CFStringCreateImmutableFunnel3
   0 CoreFoundation _CFRuntimeCreateInstance

windowControllersis NSMutableArrayalloc / init'ed in applicationDidFinishLaunchingand released in the method dealloc.

In NewMessageWindowControllerI use the following to notify the application delegate of the window closing and no longer need to save the controller:

- (void)windowWillClose:(NSNotification *)notification {
    [AppDelegate windowControllerDidFinish:self];
}

The application delegation method is as follows:

- (void)windowControllerDidFinish:(NSWindowController *)controller {
    [windowControllers removeObject:controller];
}

Writing an array before and after is what I expect. The controller is there until the window closes; it is deleted when the window closes.

. , . , dealloc NewMessageWindowController, . , , , NSCFString, .

Build and Analyze , , , / /.

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, , . - , , AppKit. , , (cmd-w).

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