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Re: Crash when closing window from the menu

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Re: Crash when closing window from the menu

Subject: Re: Crash when closing window from the menu
From: Jean-Daniel Dupas <email@hidden>
Date: Mon, 1 Dec 2008 15:12:02 +0100

When you dealloc a datasource, a delegate or any other object that is not retained by class that uses it, you have to unregister it. For example, if you have an object that is datasource for its _tableView ivar and delegate for _otherIVar ivar, you should do something like this :

- (void)dealloc {
	[_tableView setDataSource:nil];
	[_otherIVar setDelegate:nil];
	// other dealloc stuff
	[super dealloc];
}

You should also remove it from notification center if it is registered as observer, etc.

Not that all this stuff is useless in Garbage collected app, and should not be duplicate in finalize.


Le 1 déc. 08 à 14:47, Andre Masse a écrit :

Hi,
I've a strange bug that happens if the window is closed by choosing the "Close" menu and not by clicking in the window's close box. The window contains master/detail views. I can prevent the crash if I set the master's table view datasource to nil in dealloc but I don't understand why this is happening...
Any idea?
Andre Masse
backtrace here:
#0 0x922d5907 in ___forwarding___ () #1 0x922d5a12 in __forwarding_prep_0___ () #2 0x94ee1cae in -[NSTableView _dataSourceValueForColumn:row:] () #3 0x94e63fe0 in -[NSTableView preparedCellAtColumn:row:] () #4 0x94e63e44 in -[NSTableView _drawContentsAtRow:column:withCellFrame:] () #5 0x94e6337a in -[NSTableView drawRow:clipRect:] () #6 0x94e087f4 in -[NSTableView drawRowIndexes:clipRect:] () #7 0x94e072d8 in -[NSTableView drawRect:] () #8 0x94e97864 in -[NSView _drawRect:clip:] () #9 0x94e9635b in -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] () #10 0x94e966f2 in -[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] () #11 0x94e94cb1 in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView :] () #12 0x94e95b0b in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView :] () #13 0x94e95b0b in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView :] () #14 0x94e95b0b in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView :] () #15 0x94e95b0b in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView :] () #16 0x94e95b0b in -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView :] () #17 0x94e945f3 in -[NSThemeFrame _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView :] () #18 0x94e91117 in -[NSView _displayRectIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:] () #19 0x94dd1b77 in -[NSView displayIfNeeded] () #20 0x94dd1725 in -[NSWindow displayIfNeeded] () #21 0x94dd1548 in _handleWindowNeedsDisplay () #22 0x922549c2 in __CFRunLoopDoObservers () #23 0x92255d1c in CFRunLoopRunSpecific () #24 0x92256cf8 in CFRunLoopRunInMode () #25 0x93bce480 in RunCurrentEventLoopInMode () #26 0x93bce1d2 in ReceiveNextEventCommon () #27 0x93bce10d in BlockUntilNextEventMatchingListInMode () #28 0x94dcf3ed in _DPSNextEvent () #29 0x94dceca0 in -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] () #30 0x94f7aac3 in -[NSButtonCell performClick:] () #31 0x94ea0b03 in -[NSApplication sendAction:to:from:] () #32 0x94f4f540 in -[NSMenu performActionForItemAtIndex:] () #33 0x94f4f245 in -[NSCarbonMenuImpl performActionWithHighlightingForItemAtIndex:] () #34 0x94f4eecb in -[NSMenu performKeyEquivalent:] () #35 0x94f4d770 in -[NSApplication _handleKeyEquivalent:] () #36 0x94e6a733 in -[NSApplication sendEvent:] () #37 0x94dc7d0f in -[NSApplication run] () #38 0x94d94f14 in NSApplicationMain () #39 0x00002480 in main (argc=1, argv=0xbffff618) at /Users/andre/ development/CocoaTDH/version_courante/main.m:13 _______________________________________________
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Follow-Ups:

Re: Crash when closing window from the menu
From: Jerry Krinock <email@hidden>
Re: Crash when closing window from the menu
From: Andre Masse <email@hidden>


References:  
  >Crash when closing window from the menu (From: Andre Masse <email@hidden>)




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