Do you really have a space between V: and [toolbar]? I'd remove that. 


On 30 Dec, 2013, at 2:28 pm, Donald Hall <d...@appsandmore.com> wrote:

> Hi all,
> 
> I am trying to add a layout constraint to my container view programmatically 
> by putting the following code in the view controller (which I got and 
> modified from Apple's UIViewController docs):    
> -------------
> [toolbar setTranslatesAutoresizingMaskIntoConstraints: NO];
>     id topGuide = self.topLayoutGuide;
>     NSDictionary *viewsDictionary = NSDictionaryOfVariableBindings (toolbar, 
> topGuide);
>     [self.view addConstraints:
>     [NSLayoutConstraint constraintsWithVisualFormat: @"V: 
> [toolbar]-20-[topGuide]"
>     options: 0
>     metrics: nil
>     views: viewsDictionary]];
>     [self.view layoutSubviews]; // You must call this method here or the 
> system raises an exception
> -------------
> "toolbar" is a UIToolBar at the top of the view.
> 
> This doesn't work. I get the following:
> 
> 'NSInvalidArgumentException', reason: 'Unable to parse constraint format: 
> Expected a view 
> V: [toolbar]-20-[topGuide] 
>  ^'
> 
> Does anyone have any ideas where I am going wrong? I tried using the view 
> instead of topGuide, but got the same error message.
> 
> I am trying to keep the tool bar from underlapping the status bar in iOS 7, 
> while keeping iOS 6 compatibility. (Xcode 5.0.2, Base SDK iOS 7.0)
> 
> Thanks, Don
> 
> ------------
> Don Hall
> Apps & More Software Design, Inc.
> http://www.appsandmore.com
> d...@appsandmore.com
> 
> 
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