swift - UILongPressGestureRecognizer 无法正常工作

Question

我想让屏幕的右侧使节点跳转，左边的前半部分向左移动，后半部分向右移动。

一些不合适的东西:

• 当我快速左、右、左、右多次点击时(它会停止并且不会移动节点)

• 当我点击屏幕右侧并点击左侧或右侧部分时，并非每次节点在下降时移动，有时会重复第一个问题

这是一个具有相同机制的游戏示例:

https://itunes.apple.com/us/app/staying-together/id923670329?mt=8

override func didMoveToView(view: SKView) {
    /* Setup your scene here */
    let tapper = UILongPressGestureRecognizer(target: self, action: "tappedScreen:");
    tapper.minimumPressDuration = 0.1
    view.addGestureRecognizer(tapper)
}

func jumpAction(){
    if(!isJumping){
        hero.physicsBody?.applyImpulse(CGVector(dx: 0, dy: ySpeed))
    }   
    isJumping = true
}

func tappedScreen(recognizer: UITapGestureRecognizer){
    if(recognizer.state == UIGestureRecognizerState.Began){     
        let moveLeft = SKAction.moveByX(-15, y: 0, duration: 0.1)
        let moveRight = SKAction.moveByX(15, y: 0, duration: 0.1)

        let touchY = self.convertPointFromView(recognizer.locationInView(self.view)).y

        // only the bottom part of the screen, that way the UI button will be able to touch
        if(touchY < self.frame.size.height/4){      
            if(touchX > 0){
                println("up - longer");
            } else if(touchX < -(self.frame.size.width/4)){      
                println("left - longer");
                hero.runAction(SKAction.repeatActionForever(moveLeft), withKey: "longTap")
            } else {
                println("right - longer");
                hero.runAction(SKAction.repeatActionForever(moveRight), withKey: "longTap")
            }
        } 
    } else {
        if(touchX <= 0){
            if (recognizer.state == UIGestureRecognizerState.Ended) {
                println("ended, also stops the node from moving");
                hero.removeActionForKey("longTap")
            }
        }
    }
}

// I think this is need to mmove the node on single tap
override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
    /* Called when a touch begins */

    let touch: UITouch = touches.first as! UITouch;
    let location:CGPoint = touch.locationInNode(self);

    let moveLeft = SKAction.moveByX(-15, y: 0, duration: 0.1)
    let moveRight = SKAction.moveByX(15, y: 0, duration: 0.1)

    // only the bottom part of the screen, that way the UI button will be able to touch
    if(location.y < self.frame.size.height/4){
        if(location.x > 0){
            println("up");
            self.jumpAction();
        } else if(location.x < -(self.frame.size.width/4)){
            hero.runAction(moveLeft);
            println("left");
        } else {
            hero.runAction(moveRight);
            println("right");
        }
    }
}

Answer 1

这是因为 tappedScreen 有一个引用 UITapGestureRecognizer 的参数。您必须将其设置为 UILongPressGestureRecognizer。

func tappedScreen(识别器:UILongPressGestureRecognizer){

希望对您有所帮助:)