Ios- Autolayout - add a constraint for a navigation item

Question

I just started porting my application to autorun. I want to limit the label “0” below the navigation bar. I tried, but could not find a solution. Here are the screenshots.

In the storyboard, I gave a restriction from the supervisor.

In iOS7, it works great.

But in iOS6, it goes beyond the navigation bar by 64 pixels, as the add-in starts below the navigation bar.

If I could add an upper limit for the label below the navigation bar, this will solve the problem. But I can not find how to do it. I looked through a few questions. but got an answer.

Please, help.

Answer 1

Update for iOS 11:

IOS 11 introduces the concept of safe areas, and the burden of the container - all the content in the visible area, again, is in the hands of the view, not the tango of vision and the controller.

See Apple documentation here .

When working with a drop-down database or XIB, it is as simple as including a function in Xcode. This is backward compatible and should work as expected in iOS 10 and below. In the code, you should use if (@available(iOS 11.0, *)) to decide whether to set limits on safe direction / area bindings or use outdated manuals for older systems.

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When using storyboards, you need to add a limit to the layout guide . This will take care of your problems, since on iOS6, i.e. 0pt and on iOS7, it is dynamic. If you use the nib / xib file, it becomes a little more complex; you need to add a restriction to the code. The easiest way to achieve this is to create a constraint with 0 vertical space up, create an output for this constraint in the code and in viewDidLayoutSubviews , update the constant output limit line to self.topLayoutGuide.length .

Answer 2

You just need to make some changes to your restrictions:

1) Give a height limit to your label

2) Connect the shortcut to the master view - Horizontal spatial restriction

3) Add Vertical Spatial Constraint

The third step should be careful [I am attaching an image for reference.]

And after that, check if the red arrow is saved on your view controller.