Texture에서 제공되는 ASButtonNode, ASTextNode, ASMapNode, ASImageNode 등이 ASControlNode를 상속받고 있으며, 기본적으로 제공되는 ASControlNode subclass node이외 custom하게 터치가 가능한 Node를 만들 때 유용합니다.
UIKit의 UIControl과 마찬가지로 기본적인 Event를 아래와 같이 제공해줍니다.
/**
@abstract Kinds of events possible for control nodes.
@discussion These events are identical to their UIControl counterparts.
*/
typedef NS_OPTIONS(NSUInteger, ASControlNodeEvent)
{
/** A touch-down event in the control node. */
ASControlNodeEventTouchDown = 1 << 0,
/** A repeated touch-down event in the control node; for this event the value of the UITouch tapCount method is greater than one. */
ASControlNodeEventTouchDownRepeat = 1 << 1,
/** An event where a finger is dragged inside the bounds of the control node. */
ASControlNodeEventTouchDragInside = 1 << 2,
/** An event where a finger is dragged just outside the bounds of the control. */
ASControlNodeEventTouchDragOutside = 1 << 3,
/** A touch-up event in the control node where the finger is inside the bounds of the node. */
ASControlNodeEventTouchUpInside = 1 << 4,
/** A touch-up event in the control node where the finger is outside the bounds of the node. */
ASControlNodeEventTouchUpOutside = 1 << 5,
/** A system event canceling the current touches for the control node. */
ASControlNodeEventTouchCancel = 1 << 6,
/** A system event triggered when controls like switches, slides, etc change state. */
ASControlNodeEventValueChanged = 1 << 12,
/** A system event when the Play/Pause button on the Apple TV remote is pressed. */
ASControlNodeEventPrimaryActionTriggered = 1 << 13,
/** All events, including system events. */
ASControlNodeEventAllEvents = 0xFFFFFFFF
};
addTarget
UIControl과 마찬가지로 addTarget에 대한 사용법은 동일합니다.
let node = ASControlNode()
node.addTarget(target: self, action: #selector(TODO:), for: .touchUpInside)
Hit Test Slop
터치영역을 조절하는 방식으로 두가지가 있습니다. UIKit와 동일하게 hitTest:withEvent:method를 override하는 방식과 hitTestSlop property를 접근해서 UIEdgeInsets을 negative or positive 값을 적절히 지정하는 방식이 있습니다.
