My app has a window with many text fields and a button. The value in each text
field is bound to Shared Defaults. Clicking the button reads from the defaults
and generates text which is written to a text field in a second window.
The app launches with the previously used values in the text fields (as
desired). Immediately clicking the button works fine--text is generated as
expected. But if I change the value in a text field before clicking the button,
the app crashes. (This happens whether or not I first tab out of the field to
commit the edit before clicking the button.) The error is:
-[CFString release]: message sent to deallocated instance 0x164d7fd0
That leads to:
Call [2] [arg=32]: thread_a0871720 |start | main | NSApplicationMain |
-[NSApplication run] | -[NSApplication sendEvent:] | -[NSWindow sendEvent:] |
-[NSTextView keyDown:] | -[NSView interpretKeyEvents:] | -[NSTSMInputContext
interpretKeyEvents:] | -[NSKeyBindingManager(NSKeyBindingManager_MultiClients)
interpretEventAsCommand:forClient:] | -[NSTextView doCommandBySelector:] |
-[NSResponder doCommandBySelector:] | -[NSTextView(NSKeyBindingCommands)
insertTab:] | -[NSTextView(NSPrivate) _giveUpFirstResponder:] | -[NSWindow
makeFirstResponder:] | -[NSTextView(NSSharing) resignFirstResponder] |
-[NSTextField textShouldEndEditing:] | -[_NSBindingAdaptor
validateAndCommitValueInEditor:editingIsEnding:errorUserInterfaceHandled:] |
-[_NSBindingAdaptor
_validateAndCommitValueInEditor:editingIsEnding:errorUserInterfaceHandled:bindingAdaptor:]
| -[NSValueBinder
validateAndCommitValueInEditor:editingIsEnding:errorUserInterfaceHandled:] |
-[NSValueBinder
_applyDisplayedValueIfHasUncommittedChangesWithHandleErrors:typeOfAlert:discardEditingCallback:otherCallback:callbackContextInfo:didRunAlert:]
| -[NSValueBinder
applyDisplayedValueHandleErrors:typeOfAlert:canRecoverFromErrors:discardEditingCallback:otherCallback:callbackContextInfo:didRunAlert:]
| -[NSActionCell objectValue] | -[NSControl validateEditing] | -[NSCell
setStringValue:] | -[NSCell _objectValue:forString:] | -[NSCell
_objectValue:forString:errorDescription:] | -[NSPlaceholderString
initWithString:] | CFStringCreateWithCharactersNoCopy |
__CFStringCreateImmutableFunnel3 | _CFRuntimeCreateInstance | malloc_zone_malloc
I tried adding [myWindow makeFirstResponder:nil] at the beginning of the
button's action but that didn't work. The odd thing is that the crash only
affects certain text fields and not others. (All are identical except for their
Model Key Paths.) I'm a bit of an amateur and any help would be most
appreciated.
Thanks,
John
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