scrollview触摸锁死的BUG

[iNeverSleeeeep]

如果scrollview在moving的过程中visible从true变为false, 会导致onTouchEnded和onTouchCanceled不能正确结束，_touchMoved一直为true。触摸就被锁死了。附上简单的代码。
`

bool ScrollView::onTouchBegan(Touch* touch, Event* event)
{
   if (_touches.size() > 2 ||
            _touchMoved          ||
            !frame.containsPoint(touch->getLocation()))
        {
            return false;
        }
}

void ScrollView::onTouchMoved(Touch* touch, Event* event)
{
    _touchMoved = true;
}

void ScrollView::onTouchEnded(Touch* touch, Event* event)
{
    if (!this->isVisible())
    {
        return; //----------->在这返回了
    }

    auto touchIter = std::find(_touches.begin(), _touches.end(), touch);

    if (touchIter != _touches.end())
    {
        if (_touches.size() == 1 && _touchMoved)
        {
            this->schedule(CC_SCHEDULE_SELECTOR(ScrollView::deaccelerateScrolling));
        }
        _touches.erase(touchIter);
    } 

    if (_touches.size() == 0)
    {
        _dragging = false;    
        _touchMoved = false;
    }
}

void ScrollView::onTouchCancelled(Touch* touch, Event* event)
{
    if (!this->isVisible())
    {
        return; //----------->在这返回了
    }

    auto touchIter = std::find(_touches.begin(), _touches.end(), touch);
    _touches.erase(touchIter);

    if (_touches.size() == 0)
    {
        _dragging = false;    
        _touchMoved = false;
    }
}

`