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class="tummy-end"></div><div class="bottom"></div><div class="legs left"></div><div class="legs right"></div></div><div class="paw"><div class="hands left"></div><div class="hands right"></div></div></div></div><div id="container"><header id="header" itemscope itemtype="http://schema.org/WPHeader"><div class="inner"><div id="brand"><div class="pjax"><h1 itemprop="name headline">KLineChart 实现一幅图上画多个蜡烛 K 线</h1><div class="meta"><span class="item" title="创建时间：2022-11-24 08:53:00"><span class="icon"><i class="ic i-calendar"></i> </span><span class="text">发表于</span> <time itemprop="dateCreated datePublished" datetime="2022-11-24T08:53:00+08:00">2022-11-24</time> </span><span class="item" title="本文字数"><span class="icon"><i class="ic i-pen"></i> </span><span class="text">本文字数</span> <span>2.1k</span> <span class="text">字</span> </span><span class="item" title="阅读时长"><span class="icon"><i class="ic i-clock"></i> </span><span class="text">阅读时长</span> <span>2 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class="breadcrumb" itemscope itemtype="https://schema.org/BreadcrumbList"><i class="ic i-home"></i> <span><a href="/">首页</a></span><i class="ic i-angle-right"></i> <span itemprop="itemListElement" itemscope itemtype="https://schema.org/ListItem"><a href="/categories/%E5%B7%A5%E4%BD%9C/" itemprop="item" rel="index" title="分类于 工作"><span itemprop="name">工作</span></a><meta itemprop="position" content="1"></span><i class="ic i-angle-right"></i> <span class="current" itemprop="itemListElement" itemscope itemtype="https://schema.org/ListItem"><a href="/categories/%E5%B7%A5%E4%BD%9C/KLineChart/" itemprop="item" rel="index" title="分类于 KLineChart"><span itemprop="name">KLineChart</span></a><meta itemprop="position" content="2"></span></div><article itemscope itemtype="http://schema.org/Article" class="post block" lang="zh-CN"><link itemprop="mainEntityOfPage" href="https://hitoli.com/2022/11/24/KLineChart%E5%AE%9E%E7%8E%B0%E4%B8%80%E5%B9%85%E5%9B%BE%E4%B8%8A%E7%94%BB%E5%A4%9A%E4%B8%AA%E8%9C%A1%E7%83%9BK%E7%BA%BF/"><span hidden itemprop="author" itemscope itemtype="http://schema.org/Person"><meta itemprop="image" content="/images/avatar.jpg"><meta itemprop="name" content="Hito Li"><meta itemprop="description" content="天下事有难易乎？为之，则难者亦易矣, 天生我材必有用"></span><span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization"><meta itemprop="name" content="涛声依旧"></span><div class="body md" itemprop="articleBody"><h4 id="引言"><a class="anchor" href="#引言">#</a> 引言</h4><p>最近接到一个任务是通过<span class="exturl" data-url="aHR0cHM6Ly9rbGluZWNoYXJ0cy5jb20vemgtQ04vZ3VpZGU="> KLineChart</span><span class="label info">✔️8.6.1</span> 实现在一幅图上画两个合约的蜡烛图。研究 api 发现并没有通过配置实现的方法，于是联系作者沟通得知需要自己画图实现。于是有了本篇文章。<br><img data-src="https://nas.hitoli.com:18014/images/2022/11/24/KLineChart.jpg" alt="KLineChart.jpg"></p><h4 id="添加模版"><a class="anchor" href="#添加模版">#</a> 添加模版</h4><figure class="highlight js"><figcaption data-lang="JavaScript"></figcaption><table><tr><td data-num="1"></td><td><pre><span class="token keyword">let</span> shortName <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">.</span>constant<span class="token punctuation">.</span>periodTypeEnum<span class="token punctuation">.</span><span class="token function">getNameByCode</span><span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">.</span>klineType<span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token string">' 合约2：'</span> <span class="token operator">+</span> <span class="token keyword">this</span><span class="token punctuation">.</span>currentInstrumentId</pre></td></tr><tr><td data-num="2"></td><td><pre><span class="token keyword">this</span><span class="token punctuation">.</span>chart<span class="token punctuation">.</span><span class="token function">addTechnicalIndicatorTemplate</span><span class="token punctuation">(</span><span class="token punctuation">{</span></pre></td></tr><tr><td data-num="3"></td><td><pre> <span class="token literal-property property">name</span><span class="token operator">:</span> <span class="token string">'custom_candle_solid'</span><span class="token punctuation">,</span></pre></td></tr><tr><td data-num="4"></td><td><pre> <span class="token literal-property property">shortName</span><span class="token operator">:</span> shortName<span class="token punctuation">,</span></pre></td></tr><tr><td data-num="5"></td><td><pre> <span class="token literal-property property">precision</span><span class="token operator">:</span> <span class="token number">2</span><span class="token punctuation">,</span></pre></td></tr><tr><td data-num="6"></td><td><pre> <span class="token literal-property property">bar</span><span class="token operator">:</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="7"></td><td><pre> <span class="token literal-property property">upColor</span><span class="token operator">:</span> <span class="token string">'#EF5350'</span><span class="token punctuation">,</span></pre></td></tr><tr><td data-num="8"></td><td><pre> <span class="token literal-property property">downColor</span><span class="token operator">:</span> <span class="token string">'#26A69A'</span><span class="token punctuation">,</span></pre></td></tr><tr><td data-num="9"></td><td><pre> <span class="token literal-property property">noChangeColor</span><span class="token operator">:</span> <span class="token string">'#888889'</span></pre></td></tr><tr><td data-num="10"></td><td><pre> <span class="token punctuation">}</span><span class="token punctuation">,</span></pre></td></tr><tr><td data-num="11"></td><td><pre> <span class="token literal-property property">plots</span><span class="token operator">:</span> <span class="token punctuation">[</span></pre></td></tr><tr><td data-num="12"></td><td><pre> <span class="token punctuation">{</span> <span class="token literal-property property">key</span><span class="token operator">:</span> <span class="token string">'open'</span><span class="token punctuation">,</span> <span class="token literal-property property">title</span><span class="token operator">:</span> <span class="token string">'开: '</span> <span class="token punctuation">}</span><span class="token punctuation">,</span></pre></td></tr><tr><td data-num="13"></td><td><pre> <span class="token punctuation">{</span> <span class="token literal-property property">key</span><span class="token operator">:</span> <span class="token string">'close'</span><span class="token punctuation">,</span> <span class="token literal-property property">title</span><span class="token operator">:</span> <span class="token string">'收: '</span> <span class="token punctuation">}</span><span class="token punctuation">,</span></pre></td></tr><tr><td data-num="14"></td><td><pre> <span class="token punctuation">{</span> <span class="token literal-property property">key</span><span class="token operator">:</span> <span class="token string">'high'</span><span class="token punctuation">,</span> <span class="token literal-property property">title</span><span class="token operator">:</span> <span class="token string">'高: '</span> <span class="token punctuation">}</span><span class="token punctuation">,</span></pre></td></tr><tr><td data-num="15"></td><td><pre> <span class="token punctuation">{</span> <span class="token literal-property property">key</span><span class="token operator">:</span> <span class="token string">'low'</span><span class="token punctuation">,</span> <span class="token literal-property property">title</span><span class="token operator">:</span> <span class="token string">'低: '</span> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="16"></td><td><pre> <span class="token punctuation">]</span><span class="token punctuation">,</span></pre></td></tr><tr><td data-num="17"></td><td><pre> <span class="token function-variable function">calcTechnicalIndicator</span><span class="token operator">:</span> <span class="token punctuation">(</span><span class="token parameter">dataList<span class="token punctuation">,</span> <span class="token punctuation">{</span> params<span class="token punctuation">,</span> plots <span class="token punctuation">}</span></span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="18"></td><td><pre> <span class="token keyword">return</span> dataList<span class="token punctuation">.</span><span class="token function">map</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token parameter">kLineData<span class="token punctuation">,</span> i</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="19"></td><td><pre> <span class="token keyword">return</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="20"></td><td><pre> <span class="token literal-property property">instrumentId</span><span class="token operator">:</span> kLineData<span class="token punctuation">.</span>instrumentId<span class="token punctuation">,</span></pre></td></tr><tr><td data-num="21"></td><td><pre> <span class="token literal-property property">timestamp</span><span class="token operator">:</span> <span class="token function">getDateTime</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">Date</span><span class="token punctuation">(</span>kLineData<span class="token punctuation">.</span>timestamp<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">,</span></pre></td></tr><tr><td data-num="22"></td><td><pre> <span class="token literal-property property">open</span><span class="token operator">:</span> kLineData<span class="token punctuation">.</span>open<span class="token punctuation">,</span></pre></td></tr><tr><td data-num="23"></td><td><pre> <span class="token literal-property property">close</span><span class="token operator">:</span> kLineData<span class="token punctuation">.</span>close<span class="token punctuation">,</span></pre></td></tr><tr><td data-num="24"></td><td><pre> <span class="token literal-property property">high</span><span class="token operator">:</span> kLineData<span class="token punctuation">.</span>high<span class="token punctuation">,</span></pre></td></tr><tr><td data-num="25"></td><td><pre> <span class="token literal-property property">low</span><span class="token operator">:</span> kLineData<span class="token punctuation">.</span>low</pre></td></tr><tr><td data-num="26"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="27"></td><td><pre> <span class="token punctuation">}</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="28"></td><td><pre> <span class="token punctuation">}</span><span class="token punctuation">,</span></pre></td></tr><tr><td data-num="29"></td><td><pre> <span class="token function-variable function">render</span><span class="token operator">:</span> <span class="token punctuation">(</span><span class="token parameter"><span class="token punctuation">{</span> ctx<span class="token punctuation">,</span> dataSource<span class="token punctuation">,</span> viewport<span class="token punctuation">,</span> styles<span class="token punctuation">,</span> xAxis<span class="token punctuation">,</span> yAxis <span class="token punctuation">}</span></span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="30"></td><td><pre> <span class="token comment">// X 轴起始像素</span></pre></td></tr><tr><td data-num="31"></td><td><pre> <span class="token keyword">let</span> x <span class="token operator">=</span> xAxis<span class="token punctuation">.</span><span class="token function">convertToPixel</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="32"></td><td><pre> dataSource<span class="token punctuation">.</span>technicalIndicatorDataList<span class="token punctuation">.</span><span class="token function">forEach</span><span class="token punctuation">(</span><span class="token keyword">function</span> <span class="token punctuation">(</span><span class="token parameter">kLineData<span class="token punctuation">,</span> i</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="33"></td><td><pre> <span class="token keyword">let</span> open <span class="token operator">=</span> kLineData<span class="token punctuation">.</span>open</pre></td></tr><tr><td data-num="34"></td><td><pre> <span class="token keyword">let</span> close <span class="token operator">=</span> kLineData<span class="token punctuation">.</span>close</pre></td></tr><tr><td data-num="35"></td><td><pre> <span class="token keyword">let</span> high <span class="token operator">=</span> kLineData<span class="token punctuation">.</span>high</pre></td></tr><tr><td data-num="36"></td><td><pre> <span class="token keyword">let</span> low <span class="token operator">=</span> kLineData<span class="token punctuation">.</span>low</pre></td></tr><tr><td data-num="37"></td><td><pre> <span class="token comment">// 给蜡烛柱设置颜色</span></pre></td></tr><tr><td data-num="38"></td><td><pre> <span class="token keyword">if</span> <span class="token punctuation">(</span>close <span class="token operator">></span> open<span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token comment">// 涨</span></pre></td></tr><tr><td data-num="39"></td><td><pre> ctx<span class="token punctuation">.</span>strokeStyle <span class="token operator">=</span> <span class="token string">'#EF5350'</span></pre></td></tr><tr><td data-num="40"></td><td><pre> ctx<span class="token punctuation">.</span>fillStyle <span class="token operator">=</span> <span class="token string">'#EF5350'</span></pre></td></tr><tr><td data-num="41"></td><td><pre> <span class="token punctuation">}</span> <span class="token keyword">else</span> <span class="token keyword">if</span> <span class="token punctuation">(</span>close <span class="token operator"><</span> open<span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token comment">// 跌</span></pre></td></tr><tr><td data-num="42"></td><td><pre> ctx<span class="token punctuation">.</span>strokeStyle <span class="token operator">=</span> <span class="token string">'#26A69A'</span></pre></td></tr><tr><td data-num="43"></td><td><pre> ctx<span class="token punctuation">.</span>fillStyle <span class="token operator">=</span> <span class="token string">'#26A69A'</span></pre></td></tr><tr><td data-num="44"></td><td><pre> <span class="token punctuation">}</span> <span class="token keyword">else</span> <span class="token punctuation">{</span> <span class="token comment">// 未变动</span></pre></td></tr><tr><td data-num="45"></td><td><pre> ctx<span class="token punctuation">.</span>strokeStyle <span class="token operator">=</span> <span class="token string">'#888889'</span></pre></td></tr><tr><td data-num="46"></td><td><pre> ctx<span class="token punctuation">.</span>fillStyle <span class="token operator">=</span> <span class="token string">'#888889'</span></pre></td></tr><tr><td data-num="47"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="48"></td><td><pre> <span class="token comment">// 获取开盘价 Y 轴像素</span></pre></td></tr><tr><td data-num="49"></td><td><pre> <span class="token keyword">let</span> openY <span class="token operator">=</span> yAxis<span class="token punctuation">.</span><span class="token function">convertToPixel</span><span class="token punctuation">(</span>open<span class="token punctuation">)</span></pre></td></tr><tr><td data-num="50"></td><td><pre> <span class="token comment">// 获取收盘价 Y 轴像素</span></pre></td></tr><tr><td data-num="51"></td><td><pre> <span class="token keyword">let</span> closeY <span class="token operator">=</span> yAxis<span class="token punctuation">.</span><span class="token function">convertToPixel</span><span class="token punctuation">(</span>close<span class="token punctuation">)</span></pre></td></tr><tr><td data-num="52"></td><td><pre> <span class="token comment">// 开、收、高、低的 Y 轴像素</span></pre></td></tr><tr><td data-num="53"></td><td><pre> <span class="token keyword">let</span> priceY <span class="token operator">=</span> <span class="token punctuation">[</span>openY<span class="token punctuation">,</span> closeY<span class="token punctuation">,</span> yAxis<span class="token punctuation">.</span><span class="token function">convertToPixel</span><span class="token punctuation">(</span>high<span class="token punctuation">)</span><span class="token punctuation">,</span> yAxis<span class="token punctuation">.</span><span class="token function">convertToPixel</span><span class="token punctuation">(</span>low<span class="token punctuation">)</span><span class="token punctuation">]</span></pre></td></tr><tr><td data-num="54"></td><td><pre> <span class="token comment">// 从低到高排序</span></pre></td></tr><tr><td data-num="55"></td><td><pre> priceY<span class="token punctuation">.</span><span class="token function">sort</span><span class="token punctuation">(</span><span class="token keyword">function</span> <span class="token punctuation">(</span><span class="token parameter">a<span class="token punctuation">,</span> b</span><span class="token punctuation">)</span> <span class="token punctuation">{</span></pre></td></tr><tr><td data-num="56"></td><td><pre> <span class="token keyword">return</span> a <span class="token operator">-</span> b</pre></td></tr><tr><td data-num="57"></td><td><pre> <span class="token punctuation">}</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="58"></td><td><pre> <span class="token comment">// 画蜡烛柱上部</span></pre></td></tr><tr><td data-num="59"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">fillRect</span><span class="token punctuation">(</span>x <span class="token operator">-</span> <span class="token number">0.5</span><span class="token punctuation">,</span> priceY<span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> priceY<span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span> <span class="token operator">-</span> priceY<span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="60"></td><td><pre> <span class="token comment">// 画蜡烛柱下部</span></pre></td></tr><tr><td data-num="61"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">fillRect</span><span class="token punctuation">(</span>x <span class="token operator">-</span> <span class="token number">0.5</span><span class="token punctuation">,</span> priceY<span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">,</span> priceY<span class="token punctuation">[</span><span class="token number">3</span><span class="token punctuation">]</span> <span class="token operator">-</span> priceY<span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="62"></td><td><pre> <span class="token comment">// 蜡烛柱高度</span></pre></td></tr><tr><td data-num="63"></td><td><pre> <span class="token keyword">var</span> barHeight <span class="token operator">=</span> Math<span class="token punctuation">.</span><span class="token function">max</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">,</span> priceY<span class="token punctuation">[</span><span class="token number">2</span><span class="token punctuation">]</span> <span class="token operator">-</span> priceY<span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="64"></td><td><pre> <span class="token comment">// 画蜡烛柱中部 （viewport.barSpace 蜡烛柱的宽度，随放大缩小操作而变化）</span></pre></td></tr><tr><td data-num="65"></td><td><pre> ctx<span class="token punctuation">.</span><span class="token function">fillRect</span><span class="token punctuation">(</span>x <span class="token operator">-</span> <span class="token punctuation">(</span>viewport<span class="token punctuation">.</span>barSpace <span class="token operator">/</span> <span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">,</span> priceY<span class="token punctuation">[</span><span class="token number">1</span><span class="token punctuation">]</span><span class="token punctuation">,</span> viewport<span class="token punctuation">.</span>barSpace<span class="token punctuation">,</span> barHeight<span class="token punctuation">)</span></pre></td></tr><tr><td data-num="66"></td><td><pre> <span class="token comment">// 下一蜡烛柱 X 轴的起始位置（viewport.dataSpace 蜡烛柱的宽度加蜡烛柱之间的间隔，随放大缩小操作而变化）</span></pre></td></tr><tr><td data-num="67"></td><td><pre> x <span class="token operator">+=</span> viewport<span class="token punctuation">.</span>dataSpace</pre></td></tr><tr><td data-num="68"></td><td><pre> <span class="token punctuation">}</span><span class="token punctuation">)</span></pre></td></tr><tr><td data-num="69"></td><td><pre> <span class="token punctuation">}</span></pre></td></tr><tr><td data-num="70"></td><td><pre><span class="token punctuation">}</span><span class="token punctuation">)</span></pre></td></tr></table></figure><h4 id="创建指标"><a class="anchor" href="#创建指标">#</a> 创建指标</h4><figure class="highlight js"><figcaption data-lang="JavaScript"></figcaption><table><tr><td data-num="1"></td><td><pre><span class="token keyword">this</span><span class="token punctuation">.</span>chart<span class="token punctuation">.</span><span class="token function">createTechnicalIndicator</span><span class="token punctuation">(</span><span class="token string">'custom_candle_solid'</span><span class="token punctuation">,</span> <span class="token boolean">true</span><span class="token punctuation">,</span> <span class="token punctuation">{</span> <span class="token literal-property property">id</span><span class="token operator">:</span> <span class="token string">'paneId10'</span><span class="token punctuation">,</span> <span class="token literal-property property">dragEnabled</span><span class="token operator">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span> <span class="token literal-property property">height</span><span class="token operator">:</span> <span class="token keyword">this</span><span class="token punctuation">.</span>height <span class="token punctuation">}</span><span class="token punctuation">)</span></pre></td></tr></table></figure><div class="tags"><a href="/tags/KLineChart/" rel="tag"><i class="ic i-tag"></i> KLineChart</a> <a href="/tags/K%E7%BA%BF/" rel="tag"><i class="ic i-tag"></i> K线</a> <a href="/tags/%E8%9C%A1%E7%83%9B%E5%9B%BE/" rel="tag"><i class="ic i-tag"></i> 蜡烛图</a></div></div><footer><div class="meta"><span class="item"><span class="icon"><i class="ic i-calendar-check"></i> </span><span class="text">更新于</span> <time title="修改时间：2023-04-22 21:43:37" itemprop="dateModified" datetime="2023-04-22T21:43:37+08:00">2023-04-22</time> </span><span id="2022/11/24/KLineChart实现一幅图上画多个蜡烛K线/" class="item leancloud_visitors" data-flag-title="KLineChart 实现一幅图上画多个蜡烛 K 线" title="阅读次数"><span class="icon"><i class="ic i-eye"></i> </span><span class="text">阅读次数</span> <span class="leancloud-visitors-count"></span> <span class="text">次</span></span></div><div class="reward"><button><i class="ic i-heartbeat"></i> 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