AwakeFromNib called twice for sheet
AwakeFromNib called twice for sheet
- Subject: AwakeFromNib called twice for sheet
- From: Koen van der Drift <email@hidden>
- Date: Sat, 12 May 2012 08:01:15 -0400
Hi,
My app (OSX) has a sheet to obtain data from a server and display them in an NSTableView. So far I was using a Cell based table and it worked fine. Yesterday I decided to make the table view based, following the instruction by Apple <https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/TableView/PopulatingViewTablesWithBindings/PopulatingView-TablesWithBindings.html#//apple_ref/doc/uid/10000026i-CH13-SW1> The only difference with that code is that I don't bind the arraycontroller to the appdelegate, but to the viewcontroller of the sheet (the file's owner). The objects in my search array are dictionaries, so in the Attributes panel for the array controller, I added the keys of the dict I want to bind my table to. This works fine, and the retrieved data is displayed in the table.
But after the search when the table is displayed, awakeFromNib is called again for the sheet, and all my data is gone. I did some debugging, and the first time it is called as follows:
#0 0x0000000100004cff in -[SheetController awakeFromNib]
#1 0x00007fff8ce18a41 in -[NSIBObjectData nibInstantiateWithOwner:topLevelObjects:] ()
#2 0x00007fff8ce0ef73 in loadNib ()
#3 0x00007fff8ce0e470 in +[NSBundle(NSNibLoading) _loadNibFile:nameTable:withZone:ownerBundle:] ()
#4 0x00007fff8ce0e38b in +[NSBundle(NSNibLoading) loadNibFile:externalNameTable:withZone:] ()
#5 0x00007fff8cffac34 in -[NSWindowController loadWindow] ()
#6 0x00007fff8cffa9ef in -[NSWindowController window] ()
#7 0x0000000100002ad0 in -[AppDelegate showSheet:]
The second time this happens:
#0 0x0000000100004cff in -[SheetController awakeFromNib]
#1 0x00007fff8ce18a41 in -[NSIBObjectData nibInstantiateWithOwner:topLevelObjects:] ()
#2 0x00007fff8cf3851b in -[NSNib instantiateNibWithExternalNameTable:] ()
#3 0x00007fff8cf4b301 in -[NSTableRowData _unarchiveViewWithIdentifier:owner:] ()
#4 0x00007fff8cf4b0b7 in -[NSTableRowData makeViewWithIdentifier:owner:] ()
#5 0x00007fff8cf4afc9 in -[NSTableView makeViewWithIdentifier:owner:] ()
#6 0x00007fff8cf4ae11 in -[NSTableView(NSTableViewViewBased) makeViewForTableColumn:row:] ()
#7 0x00007fff8cf4aa95 in -[NSTableRowData _addViewToRowView:atColumn:row:] ()
#8 0x00007fff8cf4a8b0 in -[NSTableRowData _addViewsToRowView:atRow:] ()
#9 0x00007fff8cf49543 in -[NSTableRowData _addRowViewForVisibleRow:withPriorView:] ()
#10 0x00007fff8cf49342 in -[NSTableRowData _addRowViewForVisibleRow:withPriorRowIndex:inDictionary:withRowAnimation:] ()
#11 0x00007fff8cf49288 in -[NSTableRowData _addRowViewForVisibleRow:] ()
#12 0x00007fff8cf489cc in -[NSTableRowData _unsafeUpdateVisibleRowEntries] ()
#13 0x00007fff8cf487e7 in -[NSTableRowData updateVisibleRowViews] ()
#14 0x00007fff8cee0f04 in -[NSTableView viewWillDraw] ()
#15 0x00007fff8ce455bc in -[NSView viewWillDraw] ()
#16 0x00007fff8ce455bc in -[NSView viewWillDraw] ()
#17 0x00007fff8ce45e4a in -[NSScrollView viewWillDraw] ()
#18 0x00007fff8ce455bc in -[NSView viewWillDraw] ()
#19 0x00007fff8ce455bc in -[NSView viewWillDraw] ()
#20 0x00007fff8ce44301 in -[NSView _sendViewWillDrawInRect:clipRootView:suppressRecursion:] ()
#21 0x00007fff8ce43070 in -[NSView displayIfNeeded] ()
#22 0x00007fff8ce42a2d in _handleWindowNeedsDisplayOrLayoutOrUpdateConstraints ()
#23 0x00007fff93176f40 in __NSFireTimer ()
#24 0x00007fff917f4934 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ ()
#25 0x00007fff917f4486 in __CFRunLoopDoTimer ()
#26 0x00007fff917d4e11 in __CFRunLoopRun ()
#27 0x00007fff917d4486 in CFRunLoopRunSpecific ()
#28 0x00007fff95d794d3 in RunCurrentEventLoopInMode ()
#29 0x00007fff95d80781 in ReceiveNextEventCommon ()
#30 0x00007fff95d8060e in BlockUntilNextEventMatchingListInMode ()
#31 0x00007fff8ce06e31 in _DPSNextEvent ()
#32 0x00007fff8ce06735 in -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] ()
#33 0x00007fff8ce03071 in -[NSApplication run] ()
#34 0x00007fff8d07f244 in NSApplicationMain ()
#35 0x0000000100002472 in main
I can see there that the table view somehow triggers an additional nib instantiation (lines #5 -> #1). So obviously I messed up somewhere when changing from a cell to a view based table. What change could I have done (accidentally) when changing to a view based table that could cause this? Any tips for debugging this?
Thanks,
- Koen.
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