ios - SpriteKit 按钮保持按下状态

Question

我制作了两个按钮(leftBtn 和 rightBtn)。它们在按下和按下时工作正常。但是，当您按住，然后将手指从按钮上移开并按下时，按钮会保持按下状态吗？

这是touchDown和touchUp的代码

func touchDown(atPoint pos : CGPoint) {
    let rightBtn = childNode(withName: "rightBtn");
    let leftBtn = childNode(withName: "leftBtn");

    if(rightBtn?.frame.contains(pos) == true){
        right = true;
    }
    else if(leftBtn?.frame.contains(pos) == true){
        left = true;
    }
}

func touchMoved(toPoint pos : CGPoint) {

}

func touchUp(atPoint pos : CGPoint) {
    let rightBtn = childNode(withName: "rightBtn");
    let leftBtn = childNode(withName: "leftBtn");

    if(rightBtn?.frame.contains(pos) == true){
        right = false;
        carController.stopMove();
    }
    else if(leftBtn?.frame.contains(pos) == true){
        left = false;
        carController.stopMove();
    }
}

Answer 1

按钮保持按下状态，因为按钮上不再发生向上触摸(即手指向上移动并离开屏幕)。相反，它出现在您 View 的其他部分。如果您不希望按钮保持按下状态，请考虑将代码也添加到 touchesMoved 方法。