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ioslayoutuiviewxcode5

Interface Builder: What are the UIView's Layout iOS 6/7 Deltas for?

I just noticed the iOS 6/7 Delta property found under the UIView's structs layout.

What is this for and why is this missing from AutoLayout?

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Solution

  • This actually refers to the Delta between layout position from iOS6 to iOS7.

    In iOS7, some views can hide the status bar or have it transparent and, in effect, it is overlaid on top of your view. So if you put a UI element at (0.0, 0.0) on iOS6, it will appear below the status bar, but on iOS7 it would appear partially covered underneath the status bar. So in that case you would want a delta that matches the status bar height (20.0 points) so that the layout looks the same in iOS6 and iOS7.

    I believe this isn't needed if you use autolayout, but of course, then you lose iPad1 support, which many of us aren't willing to concede at this point in time.