Displaying transient content in a popover
Show a temporary interface on top of your app’s content on iPad.
Overview
Use popovers for app content that appears when needed and disappears when someone is finished with it. For example, use popovers to display information about the currently selected item, to display tools and configuration options, or to gather information from a person. You anchor a popover to a specific location onscreen, and the popover floats above the main window. The following image shows how the Calendar app on iPad uses a popover to show detailed meeting information.
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You specify the content of a popover using a view controller. You then present your view controller using the popover presentation style. UIKit anchors your popover to the location you specify.
The following code shows how to present a popover from a bar button item, which acts as the anchor point for the popover. UIKit uses the position of that bar button item to determine where to place the popover and how to orient its arrow. The view controller’s UIPopoverPresentationController manages the display of your popover onscreen.
Configure other properties of your view controller’s UIPopoverPresentationController object before calling the present(_:animated:completion:) method. For example, you might want to assign a delegate to manage the presentation and dismissal of the popover.