RVS_Checkbox

@IBDesignable
open class RVS_Checkbox : UIControl

This class provides a simple Swift-only module that implements a “checkbox” to replace the standard UISwitch. The switch can behave exactly like a standard UISwitch, but also has a “three-state” option, where it has definitely off, definitely on, and clear, which is a sort of “undefined” state. Default is two-state (like UISwitch). The class can use the SFSymbols checkbox symbols, but these are a bit awkward for UIKit (which is why UIKit doesn’t use them), so we have three dynamically-generated “artisanal” images that can be used to implement a round checkbox, which is friendlier for fat fingers. You can also supply three images to use for the control (or only two, if you are sticking with the “two-state” version). All images are drawn template mode, using the control tintColor. Like the UISwitch class, you can specifically call setOn(_:animated:), and it will animate the transition. You can also call setClear(animated:), if in three-state mode. This uses haptics, in the same manner as UISwitch, except that you can turn them off, by setting useHaptics to false.

  • These Int-based enum values define the possible switch states.

    See more

    Declaration

    Swift

    public enum States : Int
  • This is the public, read-only accessor for the next state.

    Declaration

    Swift

    open var nextState: States { get }
  • This holds the control’s current state (before any changes).

    Declaration

    Swift

    open var checkboxState: States { get set }
  • This is the image to be displayed in an “ON” state.

    Declaration

    Swift

    @IBInspectable
    open var onImage: UIImage? { get set }
  • This is the image to be displayed in an “OFF” state.

    Declaration

    Swift

    @IBInspectable
    open var offImage: UIImage? { get set }
  • This is the image to be displayed in a “CLEAR” (“OFF,” if two-state) state.

    Declaration

    Swift

    @IBInspectable
    open var clearImage: UIImage? { get set }
  • If this is true, then control is three state (OFF-CLEAR-ON). Otherwise (default), it is two state (OFF-ON).

    Declaration

    Swift

    @IBInspectable
    open var isThreeState: Bool { get set }
  • If true, then the control will not use the dynamically-generated images, and will, instead, use standard SFSymbols square images. If the user supplies images, then this will be ignored.

    Declaration

    Swift

    @IBInspectable
    open var isUsingSFSymbols: Bool { get set }
  • If this is true (default is false), then CLEAR will use the image supplied for the three-state OFF. This is ignored in three-state mode, or SFSymbols mode (which already does that).

    Declaration

    Swift

    @IBInspectable
    open var useOffImageForClear: Bool { get set }
  • If this is true (default), then the control will use subtle haptics. These will not happen for programmatic set; only for direct UI interaction.

    Declaration

    Swift

    @IBInspectable
    open var useHaptics: Bool { get set }
  • This is the control value, as an Int:

    • -1: OFF
    • 0: CLEAR (Or OFF, in two-state)
    • 1: ON

    Declaration

    Swift

    open var value: Int { get set }
  • This returns true, if the control is currently in “CLEAR” state (which is also off, for two-state). READ-ONLY

    Declaration

    Swift

    open var isClear: Bool { get }
  • This returns true, if the control is in “OFF” state (three state), or either “off” or “clear” (two-state). READ-ONLY

    Declaration

    Swift

    open var isOff: Bool { get }
  • This returns true, if the control is in ON state. If explicitly set to false, the checkbox is set to OFF (or CLEAR for two state).

    Declaration

    Swift

    @IBInspectable
    open var isOn: Bool { get set }
  • This sets the control to either ON or OFF. It can be animated.

    Declaration

    Swift

    open func setOn(_ inIsOn: Bool, animated inIsAnimated: Bool = false)

    Parameters

    inIsOn

    If true, the control is set to ON. If false, the control is set to OFF (or CLEAR, in two-state)

    animated

    If true, the change is animated.

  • This sets the control to CLEAR (or OFF, in two-state). It can be animated.

    Declaration

    Swift

    open func setClear(animated inIsAnimated: Bool = false)

    Parameters

    animated

    If true, the change is animated.

  • This explicitly sets the control state. It can be animated.

    Declaration

    Swift

    open func setState(_ inState: States, animated inIsAnimated: Bool = false)

    Parameters

    inState

    The control state.

    animated

    If true, the change is animated.

  • This explicitly sets the control state. It can be animated.

    Declaration

    Swift

    open func setValue(_ inValue: Int, animated inIsAnimated: Bool = false)

    Parameters

    inValue

    This is the desired control value, as an Int. If the number is any negative number, it is considered OFF. If it is any positive number, it is considered ON. 0 is CLEAR. If in two-state, negative numbers are the same as 0.

    animated

    If true, the change is animated.

  • It’s important for the background to be clear.

    Declaration

    Swift

    override open func layoutSubviews()
  • The tint color. The override is to force a redraw.

    Declaration

    Swift

    override open var tintColor: UIColor? { get set }
  • The enabled state. The override is to force a redraw.

    Declaration

    Swift

    override open var isEnabled: Bool { get set }
  • This draws the control, dimming, if tracking, and over the control.

    Declaration

    Swift

    override open func draw(_ inRect: CGRect)

    Parameters

    inRect

    The rect to draw.

  • Called when the user starts a press.

    Declaration

    Swift

    override open func beginTracking(_ inTouch: UITouch, with inEvent: UIEvent?) -> Bool

    Parameters

    inTouch

    The touch instance (passed to superclass).

    with

    The event (passed to superclass).

    Return Value

    True, if the touch is approved.

  • Called when the user starts a press.

    Declaration

    Swift

    override open func continueTracking(_ inTouch: UITouch, with inEvent: UIEvent?) -> Bool

    Parameters

    inTouch

    The touch instance (passed to superclass).

    with

    The event (passed to superclass).

    Return Value

    True, if the drag/touch should continue.

  • Called when the user ends a press. If the touch ends inside the control, the value is changed, and messages are sent.

    Declaration

    Swift

    override open func endTracking(_ inTouch: UITouch?, with inEvent: UIEvent?)

    Parameters

    inTouch

    The touch instance (passed to superclass).

    with

    The event (passed to superclass).

  • Called when a touch is canceled.

    Declaration

    Swift

    override open func cancelTracking(with inEvent: UIEvent?)

    Parameters

    with

    The event (passed to superclass).