CCScrollView与CCControlButton.如何控制触摸区域

Question

我有CCScrollView与容器与CCControlButtons，当按钮滚动出可见的CCScrollView区域，他们也可以被触摸。如何控制区域

Answer 1

受Tomasz回答的启发，我创建了另一个解决方案，同样继承了CCControlButton:

bool ScrollableButton::isTouchInside(CCTouch *touch) {
  return !dragging && CCControlButton::isTouchInside(touch);
}
bool ScrollableButton::ccTouchBegan(CCTouch *touch, CCEvent *event) {
  dragging = false;
  return CCControlButton::ccTouchBegan(touch, event);
}
void ScrollableButton::ccTouchMoved(CCTouch *touch, CCEvent *event) {
  if (!dragging && ccpDistance(touch->getLocation(), touch->getStartLocation()) > 25) {
    dragging = true;
  }
  CCControlButton::ccTouchMoved(touch, event);
}
void ScrollableButton::ccTouchEnded(CCTouch *touch, CCEvent *event) {
  CCControlButton::ccTouchEnded(touch, event);
  dragging = false;
}
void ScrollableButton::ccTouchCancelled(CCTouch *touch, CCEvent *event) {
  CCControlButton::ccTouchCancelled(touch, event);
  dragging = false;
}

秘方是覆盖isTouchInside功能，这将返回false，即使触摸是在里面，但被移动。这样，当你开始滚动时，按钮也会释放它的"缩放"状态。

它还增加了一个小的容差系数，所以如果触摸移动了一点，它仍然被认为是"点击"。在上面的例子中，这个因子被硬编码为25。

Answer 2

我的问题:有一个带有许多按钮(项目)的scrollView。上面有两个功能按钮(返回，开始)。

1. 当我向下滚动时，项目按钮覆盖功能按钮。当我吞下滚动视图上方的所有触点时，我将失去功能按钮。

2. 当我开始拖动滚动视图时，项目按钮被按下。当我结束按钮动作将被执行。

但是有解决办法。我已经创建了新的CCControlButton。它检查是否在滚动视图外被点击或被拖动。该按钮用于项目按钮。

bool ControlButtonForScrolling::checkIfTouchIsInsideScrollView(CCTouch *pTouch)
{
    CCPoint touchLocation = pTouch->getLocation(); // Get the touch position
    touchLocation = _scrollView->getParent()->convertToNodeSpace(touchLocation);
    CCRect bBox=_scrollView->boundingBox();
    bool result = bBox.containsPoint(touchLocation);
    return result;
}
bool ControlButtonForScrolling::ccTouchBegan(CCTouch *pTouch, CCEvent *pEvent)
{
    bool isInside = this->checkIfTouchIsInsideScrollView(pTouch);
    if (isInside) {
        return CCControlButton::ccTouchBegan(pTouch, pEvent);
    }
    else
    {
        return false;
    }
}
void ControlButtonForScrolling::ccTouchMoved(CCTouch *pTouch, CCEvent *pEvent)
{
    CCControlButton::ccTouchMoved(pTouch, pEvent);
    _scrollWasDragged = true; // information about dragging is stored to prevent sending action
}
void ControlButtonForScrolling::ccTouchEnded(CCTouch *pTouch, CCEvent *pEvent)
{
    // this method is a copy of CCControlButton::ccTouchEnded except lines with _scrollWasDragged
    m_eState = CCControlStateNormal;
    m_isPushed = false;
    setHighlighted(false);
    if (!_scrollWasDragged)
    {
        if (isTouchInside(pTouch))
        {
            sendActionsForControlEvents(CCControlEventTouchUpInside);
        }
        else
        {
            sendActionsForControlEvents(CCControlEventTouchUpOutside);
        }
    }
    _scrollWasDragged = false;
}