swapForegroundWithBackground()swapForegroundWithBackgroundswapForegroundWithBackground

Background Layer

• GSBackgroundLayer

  Editable background content associated with a foreground layer.

• background

  Editable background content associated with the layer.

• hasBackground()hasBackgroundhasBackground

  Whether a background layer has been created.

• content(toBackgroundCheckSelection:keepOldBackground:)contentToBackgroundCheckSelection:keepOldBackground:contentToBackgroundCheckSelection_keepOldBackground_

  Copies shapes and anchors to the corresponding foreground or background layer.