Instance Method

viewWillLayoutSubviews()

Called to notify the view controller that its view is about to layout its subviews.

Declaration

func viewWillLayoutSubviews()

Discussion

When a view'€™s bounds change, the view adjusts the position of its subviews. Your view controller can override this method to make changes before the view lays out its subviews. The default implementation of this method does nothing.

See Also

Configuring the View’s Layout Behavior

var safeAreaLayoutGuide: UILayoutGuide

The layout guide describing the unobscured portion of the screen.

Deprecated
var additionalSafeAreaInsets: UIEdgeInsets

Custom insets that you specify to modify the view controller's safe area.

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var systemMinimumLayoutMargins: NSDirectionalEdgeInsets

The minimum layout margins defined by the system.

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var viewRespectsSystemMinimumLayoutMargins: Bool

A Boolean value indicating whether the view controller's view uses the system-defined minimum layout margins.

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var edgesForExtendedLayout: UIRectEdge

The extended edges to use for the layout.

var extendedLayoutIncludesOpaqueBars: Bool

A Boolean value indicating whether or not the extended layout includes opaque bars.

func viewDidLayoutSubviews()

Called to notify the view controller that its view has just laid out its subviews.

func viewLayoutMarginsDidChange()

Called to notify the view controller that the layout margins of its view changed.

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func viewSafeAreaInsetsDidChange()

Called to notify the view controller that its safe area insets changed.

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func updateViewConstraints()

Called when the view controller'€™s view needs to update its constraints.