Hit Testing and Collision Detection - Beginning Swift Games Development for iOS - page 202

Chapter 14

Hit Testing and Collision Detection

So far in the game you have not moved the hero, and now you need to get him up on his
feet and moving around. You are going to keep this simple and use a one-finger touch to
move forward and two fingers to move back. To move left and right, you will use the accel-
erometer.

GameView: Moving the Hero

Start by creating a new Swift file in the project and name it GameView.swift . Once the
file is created, you will create a subclass from SCNView called GameView . This view will
be used in order to capture the touches from the user. If you look at Listing 14-1 , you can
see that you are overriding the touchesBegan method and the touchesEnded meth-
od.

Listing 14-1 . GameView.swift

import SceneKit
class GameView : SCNView {
var touchCount:Int?
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)

}
override func touchesBegan(touches: NSSet, withEvent
event: UIEvent) {
var taps = event.allTouches()
touchCount = taps?.count

}
override func touchesEnded(touches: NSSet, withEvent
event: UIEvent) {
touchCount = 0