thumbImage(for:)
Returns the thumb image associated with the specified control state.
Declaration
func thumbImage(for state: UIControl.State) -> UIImage?Parameters
- state:
The control state whose thumb image you want to use. Specify a single control state value for this parameter.
Return Value
The thumb image associated with the specified state, or nil if an appropriate image could not be retrieved. This method might return nil if you specify multiple control states in the state parameter. For a description of track and thumb images, see Customize the slider’s appearance.