documentInteractionControllerRectForPreview(_:)
Called when a document interaction controller needs the rectangle to use as the starting point for animating the display of a document preview.
Declaration
optional func documentInteractionControllerRectForPreview(_ controller: UIDocumentInteractionController) -> CGRectParameters
- controller:
The document interaction controller requesting the starting rectangle.
Return Value
A rectangle in the coordinate system of the view returned by the documentInteractionControllerViewForPreview(_:) method.
Discussion
If you do not implement the documentInteractionControllerViewForPreview(_:) method, or if you do implement it but return a nil value, this method is not called. If you do not implement this method, the starting rectangle is assumed to be the bounds of the view returned by the documentInteractionControllerViewForPreview(_:) method.