![]() Most of these changes can occur at runtime, and they require a dynamic response from your app. You want to support different screen sizes. You want to support different size classes. The active call and audio recording bars appear or disappear (iOS). The user enters or leaves Split View on an iPad (iOS). Here are some common sources of external change: With each change, you must update the layout of your view hierarchy to best use the available space. ![]() This constraint-based approach to design allows you to build user interfaces that dynamically respond to both internal and external changes.Įxternal changes occur when the size or shape of your superview changes. If the image view’s size or position changes, the button’s position automatically adjusts to match. For example, you can constrain a button so that it is horizontally centered with an Image view and so that the button’s top edge always remains 8 points below the image’s bottom. Auto Layout dynamically calculates the size and position of all the views in your view hierarchy, based on constraints placed on those views. ![]()
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December 2022
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