**
I have a button to trigger the popover, and a checkbox on the popover. The
state checkbox of the checkbox is bound to a field 'checkboxState' of an
NSManagedObject.
Here is the scenario:
1. I click the button, the popover will show up.
2. I check the checkbox on the popover, then the popover becomes larger
and some other views are shown (if I uncheck the checkbox, the views will
be hidden, and the popover goes back to the original size). *The
checkboxState is YES here*
3. I close the popover, and do some other stuff which will *change the
checkboxState to NO*.
4. I click the button again, then the app hangs for about 10 seconds and
the xcode throws EXC_BAD_ACCESS(code=2, address=0x7fff5f3ffff8), the caller
is 0_CFArrayReplaceValues
*The app doesn't die, it just doesn't respond.*
The button's action is as following:
- (IBAction)showPopover:(id)sender {
if (!_myPopover) {
_myPopover = [[NSPopover alloc] init];
_myPopover.delegate = self;
_myPopover.contentViewController = self;
_myPopover.animates = YES;
_myPopover.behavior = NSPopoverBehaviorSemitransient;
_myPopover.appearance = NSPopoverAppearanceMinimal;
}
id theManagedObject = self.myArrayController.selection;
BOOL state = [[theManagedObject valueForKey:@"checkboxState"] boolValue];
if (state) {
_myPopover.contentSize = NSMakeSize(360, 340);
[self.view1 setHidden:NO];
[self.view2 setHidden:NO];
}
else {
[self.view1 setHidden:YES];
[self.view2 setHidden:YES];
_myPopover.contentSize = NSMakeSize(360, 270);
}
[_myPopover showRelativeToRect:[sender bounds] ofView:sender
preferredEdge:NSMaxYEdge];}
The code that changes the checkboxState of the object is: [anManagedObject
setValue:@NO forKey:@"checkboxState"]
If I comment the _myPopover.contentSize = NSMakeSize(360, 270) in
showPopover; it will work.
If I comment the [anManagedObject setValue:@NO forKey:@"checkboxState"] ,
it will work
I used @try @catch, no error thrown. I used the Profile tool, it seems the
app goes into an infinite loop, and the memory usage goes up very quickly.
The possible callers that cause this are[NSLayoutConstaint
_loweredExpressionReportingConstantIsRounded:]
and[NSIsObjectiveLinearExpression
replaceVariable:withExpression:processVariableNewToReceiver:processVariableDroppedFromReceiver:]
Any ideas? I have been stuck at this problem for a day. Really need to
solve this.
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