swift - SKSpriteNode 未检测到触摸事件

Question

我无法触发 touchesBegan 函数。它不会在用户触摸节点时被调用。

import SpriteKit

class SimpleButton: SKSpriteNode {
    //called when the user taps the button
    override func touchesBegan(touches: NSSet!, withEvent event: UIEvent!) {
        println("touches began")
    }

    //called when the user finishes touching the button
    override func touchesEnded(touches: NSSet!, withEvent event: UIEvent!) {
        println("touches ended")
    }

    override func touchesMoved(touches: NSSet!, withEvent event: UIEvent!) {
        println("touches moved")
    }
}

Answer 1

答案是，您需要使用 userInteractionEnabled 参数启用触摸。

let imageTexture = SKTexture(imageNamed: "a_button")
let sprite: SimpleButton = SimpleButton(texture: imageTexture)

sprite.userInteractionEnabled = true  // <---  This is required, it defaults to false.

sprite.position = CGPoint(x:CGRectGetMidX(self.frame) - 200, y:CGRectGetMidY(self.frame));
sprite.color = UIColor.blackColor()
sprite.colorBlendFactor = 1.0
self.addChild(sprite)