> On 14 Sep 2015, at 17:39, Thomas Wetmore <[email protected]> wrote:
>
>
>> On Sep 14, 2015, at 11:54 AM, Dave <[email protected]> wrote:
>>
>> I tred this:
>>
>> myDetailView = [myDetailViewController getPrimaryView];
>> [self.pValidationListStackView addView:myDetailView
>> inGravity:NSStackViewGravityTop];
>>
>> myConstraintsViewDictionary = [[NSMutableDictionary alloc] init];
>> [myConstraintsViewDictionary setObject:self.pValidationListStackView
>> forKey:@"StackView”];
>> [myConstraintsViewDictionary setObject:myDetailView
>> forKey:@"DetailView”];
>>
>> myConstraintsArray = [NSLayoutConstraint
>> constraintsWithVisualFormat:@"H:|[DetailView]|" options:0 metrics:nil
>> views:myConstraintsViewDictionary];
>> [myDetailView addConstraints:myConstraintsArray];
>>
>> I assumeI don’t need to add StackView to the Dictionary but it won’t do any
>> harm?
>>
>> When I run the above I get this error:
>>
>> Unable to install constraint on view. Does the constraint reference
>> something from outside the subtree of the view? That’s illegal.
>> constraint:<NSLayoutConstraint:0x610000083de0 H:|-(0)-[LTWDetailXView]
>> (Names: LTWDetailXView:0x608000181930,
>> '|':NSStackViewContainer:0x6300001a0540 )> view:<LTWDetailXView:
>> 0x608000181930>
>
> The error message is saying that either your detail view or its container
> view are not within the view tree of the receiver’s or any of the receiver’s
> ancestors’ view trees. You need to figure out whether that is or is not true.
> I tend to believe error messages until they are proven wrong. They are my
> friends.
>
If you look at the code, I’ve just added the DetailView to the StackView, so by
definition DetailView is a Subview of StackView isn’t it?
>> Any idea what could be wrong?
>
> Yes — I would believe the error message and assume that the constraint
> references something from outside the subtree of the view. This would mean
> that, at the point you are trying to add the constraints, either you haven’t
> built the full view structure yet, or the structure you have built isn’t what
> you think it is.
The structure was in my OP:
NSScrollView Setup in NIB
NSFlippedClipView Setup in NIB
NSStackView Setup in NIB
LTWDetailXView (added dynamically in code).
Cheers
Dave
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