cocos2d-x RichText 真实高度

发布时间：2020-12-14 16:45:50 所属栏目：百科来源：网络整理

导读：cocos2d-x 版本 3.8 在RichText自动换行后，发现不能得到真实高度，查看源码发现算出了实际高度，但确没用上，都多少个版本了，还没完善 void RichText::formarRenderers(){ if (_ignoreSize) { float newContentSizeWidth = 0.0f; float newContentSizeHeig

cocos2d-x版本3.8

在RichText自动换行后，发现不能得到真实高度，查看源码发现算出了实际高度，但确没用上，都多少个版本了，还没完善

void RichText::formarRenderers()
{
    if (_ignoreSize)
    {
        float newContentSizeWidth = 0.0f;
        float newContentSizeHeight = 0.0f;
        
        Vector<Node*>* row = (_elementRenders[0]);
        float nextPosX = 0.0f;
        for (ssize_t j=0; j<row->size(); j++)
        {
            Node* l = row->at(j);
            l->setAnchorPoint(Vec2::ZERO);
            l->setPosition(nextPosX,0.0f);
            this->addProtectedChild(l,1);
            Size iSize = l->getContentSize();
            newContentSizeWidth += iSize.width;
            newContentSizeHeight = MAX(newContentSizeHeight,iSize.height);
            nextPosX += iSize.width;
        }
        this->setContentSize(Size(newContentSizeWidth,newContentSizeHeight));
    }
    else
    {
        float newContentSizeHeight = 0.0f;
        float *maxHeights = new float[_elementRenders.size()];
        
        for (size_t i=0; i<_elementRenders.size(); i++)
        {
            Vector<Node*>* row = (_elementRenders[i]);
            float maxHeight = 0.0f;
            for (ssize_t j=0; j<row->size(); j++)
            {
                Node* l = row->at(j);
                maxHeight = MAX(l->getContentSize().height,maxHeight);
            }
            maxHeights[i] = maxHeight;
            newContentSizeHeight += maxHeights[i];//这里 算出了实际高度，但确没用上
        }
        
        float nextPosY = _customSize.height;
        for (size_t i=0; i<_elementRenders.size(); i++)
        {
            Vector<Node*>* row = (_elementRenders[i]);
            float nextPosX = 0.0f;
            nextPosY -= (maxHeights[i] + _verticalSpace);
            
            for (ssize_t j=0; j<row->size(); j++)
            {
                Node* l = row->at(j);
                l->setAnchorPoint(Vec2::ZERO);
                l->setPosition(nextPosX,nextPosY);
                this->addProtectedChild(l,1);
                nextPosX += l->getContentSize().width;
            }
        }
        delete [] maxHeights;
    }
    
    size_t length = _elementRenders.size();
    for (size_t i = 0; i<length; i++)
	{
        Vector<Node*>* l = _elementRenders[i];
        l->clear();
        delete l;
	}    
    _elementRenders.clear();
    
    if (_ignoreSize)
    {
        Size s = getVirtualRendererSize();
        this->setContentSize(s);
    }
    else
    {
        this->setContentSize(_customSize);
    }
    updateContentSizeWithTextureSize(_contentSize);
}

只有自己动手了

在RichText.h中加

Size _renderSize;
Size& getRenderSize();
void setRenderSize(const Size &size);

在RichText.cpp中改formarRenderers()

void RichText::formarRenderers()
{
    if (_ignoreSize)
    {
        float newContentSizeWidth = 0.0f;
        float newContentSizeHeight = 0.0f;
        
        Vector<Node*>* row = (_elementRenders[0]);
        float nextPosX = 0.0f;
        for (ssize_t j=0; j<row->size(); j++)
        {
            Node* l = row->at(j);
            l->setAnchorPoint(Vec2::ZERO);
            l->setPosition(nextPosX,newContentSizeHeight));
        this->setRenderSize(Size(newContentSizeWidth,newContentSizeHeight));  //这里加一行
    }
    else
    {
        float newContentSizeHeight = 0.0f;
        float *maxHeights = new float[_elementRenders.size()];
        
        for (size_t i=0; i<_elementRenders.size(); i++)
        {
            Vector<Node*>* row = (_elementRenders[i]);
            float maxHeight = 0.0f;
            for (ssize_t j=0; j<row->size(); j++)
            {
                Node* l = row->at(j);
                maxHeight = MAX(l->getContentSize().height,maxHeight);
            }
            maxHeights[i] = maxHeight;
            newContentSizeHeight += maxHeights[i];
        }
        
        float nextPosY = _customSize.height;
        for (size_t i=0; i<_elementRenders.size(); i++)
        {
            Vector<Node*>* row = (_elementRenders[i]);
            float nextPosX = 0.0f;
            nextPosY -= (maxHeights[i] + _verticalSpace);
            
            for (ssize_t j=0; j<row->size(); j++)
            {
                Node* l = row->at(j);
                l->setAnchorPoint(Vec2::ZERO);
                l->setPosition(nextPosX,1);
                nextPosX += l->getContentSize().width;
            }
        }
        this->setRenderSize(Size(_contentSize.width,newContentSizeHeight));//这里把没用上的newContentSizeHeight用上

        delete [] maxHeights;
    }
    
    size_t length = _elementRenders.size();
    for (size_t i = 0; i<length; i++)
	{
        Vector<Node*>* l = _elementRenders[i];
        l->clear();
        delete l;
	}    
    _elementRenders.clear();
    
    if (_ignoreSize)
    {
        Size s = getVirtualRendererSize();
        this->setContentSize(s);
    }
    else
    {
        this->setContentSize(_customSize);
    }
    updateContentSizeWithTextureSize(_contentSize);
}

再实现

Size& RichText::getRenderSize()
{
    return this->_renderSize;
}
void RichText::setRenderSize(const Size &size)
{
    _renderSize = size;
}

OK了，实际高度有了，发现getReaderSize()还是不对，继续查源码

发现adaptRenderers()是在Widget的visit()里调用的，也就是说当前桢不会被调用，这就好办了，在RichText pushBackElement 之后显示的调用一下formatText()就OK了，

（编辑：李大同）

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