I updated my OS yesterday, and now my modal window doesn’t work (which
probably means I’m doing it wrong and just got lucky before).
I created the window by asking XCode to create a subclass of NSWindowController
and making sure the “also create xib” checkbox was checked. Then I designed the
UI, outlets and actions, and wrote the short bit of code that’s supposed to
call up the window in my document controller.
The window’s name is OpenXmlExportSettings, and the code that displays it looks
like this:
if ( self.openXmlExportSettings == nil ) {
self.openXmlExportSettings = [[OpenXmlExportSettings alloc] init];
}
OpenXmlExportSettings* settings = self.openXmlExportSettings;
NSInteger result = [NSApp runModalForWindow:settings.window];
if ( result == NSModalResponseAbort ) {
return;
}
// After this we do useful things with the selected settings...
I haven’t made any changes to this since last week when it worked, but like I
said, that doesn’t mean I’m sure this was good code to begin with.
Now when runModalForWindow: is called, I get this crash before the window ever
appears:
2015-02-08 16:24:04.155 MyApp[2989:720882] *** Assertion failure in
-[NSApplication
_commonBeginModalSessionForWindow:relativeToWindow:modalDelegate:didEndSelector:contextInfo:],
/SourceCache/AppKit/AppKit-1344.72/AppKit.subproj/NSApplication.m:4048
2015-02-08 16:24:04.159 MyApp[2989:720882] An uncaught exception was raised
2015-02-08 16:24:04.159 MyApp[2989:720882] Modal session requires modal window
2015-02-08 16:24:04.165 MyApp[2989:720882] (
0 CoreFoundation 0x00007fff8679a66c
__exceptionPreprocess + 172
1 libobjc.A.dylib 0x00007fff874a276e objc_exception_throw
+ 43
2 CoreFoundation 0x00007fff8679a44a +[NSException
raise:format:arguments:] + 106
3 Foundation 0x00007fff93e083a9 -[NSAssertionHandler
handleFailureInMethod:object:file:lineNumber:description:] + 195
4 AppKit 0x00007fff8a278d27 -[NSApplication
_commonBeginModalSessionForWindow:relativeToWindow:modalDelegate:didEndSelector:contextInfo:]
+ 637
5 AppKit 0x00007fff8a2825e7 -[NSApplication
beginModalSessionForWindow:] + 37
6 AppKit 0x00007fff8a282501 -[NSApplication
runModalForWindow:] + 98
7 MyApp 0x0000000100004050 -[Document
exportToOpenXml:] + 320
8 libsystem_trace.dylib 0x00007fff935e6cd7
_os_activity_initiate + 75
9 AppKit 0x00007fff8a14db71 -[NSApplication
sendAction:to:from:] + 452
10 AppKit 0x00007fff8a167cbe -[NSMenuItem
_corePerformAction] + 382
11 AppKit 0x00007fff8a1679dc -[NSCarbonMenuImpl
performActionWithHighlightingForItemAtIndex:] + 114
12 libsystem_trace.dylib 0x00007fff935e6cd7
_os_activity_initiate + 75
13 AppKit 0x00007fff8a1b54e0 -[NSMenu
performActionForItemAtIndex:] + 131
14 AppKit 0x00007fff8a1b5446 -[NSMenu
_internalPerformActionForItemAtIndex:] + 35
15 AppKit 0x00007fff8a1b5292 -[NSCarbonMenuImpl
_carbonCommandProcessEvent:handlerCallRef:] + 107
16 AppKit 0x00007fff8a15d5db
NSSLMMenuEventHandler + 724
17 HIToolbox 0x00007fff8b34b98c
_ZL23DispatchEventToHandlersP14EventTargetRecP14OpaqueEventRefP14HandlerCallRec
+ 1260
18 HIToolbox 0x00007fff8b34adce
_ZL30SendEventToEventTargetInternalP14OpaqueEventRefP20OpaqueEventTargetRefP14HandlerCallRec
+ 386
19 HIToolbox 0x00007fff8b35f8f6
SendEventToEventTarget + 40
20 HIToolbox 0x00007fff8b394f25
_ZL18SendHICommandEventjPK9HICommandjjhPKvP20OpaqueEventTargetRefS5_PP14OpaqueEventRef
+ 428
21 HIToolbox 0x00007fff8b3c864d
SendMenuCommandWithContextAndModifiers + 59
22 HIToolbox 0x00007fff8b3c85f4
SendMenuItemSelectedEvent + 188
23 HIToolbox 0x00007fff8b3c84c6
_ZL19FinishMenuSelectionP13SelectionDataP10MenuResultS2_ + 96
24 HIToolbox 0x00007fff8b3d0071
_ZL14MenuSelectCoreP8MenuData5PointdjPP13OpaqueMenuRefPt + 702
25 HIToolbox 0x00007fff8b3cfc5e
_HandleMenuSelection2 + 446
26 AppKit 0x00007fff8a0e38be
_NSHandleCarbonMenuEvent + 277
27 AppKit 0x00007fff89f7f2f0 _DPSNextEvent + 1843
28 AppKit 0x00007fff89f7e730 -[NSApplication
nextEventMatchingMask:untilDate:inMode:dequeue:] + 194
29 AppKit 0x00007fff89f72593 -[NSApplication run]
+ 594
30 AppKit 0x00007fff89f5da14 NSApplicationMain +
1832
31 MyApp 0x0000000100016b32 main + 34
32 libdyld.dylib 0x00007fff866175c9 start + 1
)
I’m focusing on that line which says “Modal session requires modal window.”
Could that mean there’s an incorect setting I don’t know about in the NIB file?
Or do I have to do something to tell the window controller to wake up the
window before using it?
—
Charles
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