Sprite Kit - 如何延迟 touchesBegan

Question

我的应用程序的控件很简单。

触摸屏幕左侧调用一个函数。
触摸右侧调用第二个函数。 T
同时触摸两侧调用第三个功能。

问题是，除非您同时触摸屏幕的右侧和左侧，否则将调用先触摸哪一侧的函数。我希望能够等待几分之一秒，看看用户是否会在允许调用左侧或右侧功能之前触摸屏幕的两侧。

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {

        for touch in touches {
            let location = touch.locationInView(nil)

            if location.x < self.size.width / 2 {
                touchingLeft = true
            }
            if location.x > self.size.width / 2 {
                touchingRight = true
            }

            if touchingRight && touchingLeft {
                ship.fireMain()

            //Wait for 1/10 of a second...

            } else if touchingLeft && !touchingRight {
                ship.fireLeft()
            } else if !touchingLeft && touchingRight {
                ship.fireRight()
            }
        }  
    }

Answer 1

要检测左、右和左+右触摸，只需在短暂延迟后执行触摸测试即可。这是一个如何做到这一点的例子。

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    for touch in touches {
        let location = touch.locationInView(nil)

        if !touchingLeft && !touchingRight {
            // Adjust the delay as needed
            let delay = SKAction.waitForDuration(0.01)
            let test = SKAction.runBlock {
                // Avoid retain cycle
                [weak self] in
                self?.testTouches()
            }
            let delayAndTest = SKAction.sequence([delay, test])
            runAction(delayAndTest)
        }

        if location.x < self.size.width / 2 {
            touchingLeft = true
        }
        else if location.x > self.size.width / 2 {
            touchingRight = true
        }
    }
}

func testTouches() {
    if touchingLeft && touchingRight {
        print("left+right")
    }
    else if touchingRight {
        print("right")
    }
    else {
        print("left")
    }
    touchingRight = false
    touchingLeft = false
}

Sprite Kit - 如何延迟 touchesBegan

Sprite Kit - How to delay touchesBegan

timestamp

touchesbegan

sprite-kit