ios - 如何为图表的图例添加背景颜色
<p><p>我正在使用 <a href="https://github.com/danielgindi/Charts" rel="noreferrer noopener nofollow">library</a>在我的应用程序中构建一个很棒的图表。一切正常，但今天我遇到了问题。我想在图表的图例下方添加简单的背景颜色。</p>
<p>我的传奇是这样的:</p>
<p> <a href="/image/QM2IY.png" rel="noreferrer noopener nofollow"><img src="/image/QM2IY.png" alt="enter image description here"/></a> </p>
<p>我想实现这样的目标:</p>
<p> <a href="/image/cWDjO.png" rel="noreferrer noopener nofollow"><img src="/image/cWDjO.png" alt="enter image description here"/></a> </p>
<p>我目前对图表图例部分的实现:</p>
<pre><code>private func prepareLegend() {
lineChart.legend.drawInside = true
lineChart.legend.horizontalAlignment = .right
lineChart.legend.verticalAlignment = .top
lineChart.legend.orientation = .vertical
lineChart.legend.formSize = 14.0
lineChart.legend.yEntrySpace = 6.0
lineChart.legend.font = UIFont.pmd_robotoRegular(ofSize: 12.0)
lineChart.legend.textColor = UIColor.pmd_darkGrey
let upperLegend = LegendEntry()
upperLegend.label = "Upper Thershold"
upperLegend.form = .square
upperLegend.formColor = UIColor.pmd_red
let lowerLegend = LegendEntry()
lowerLegend.label = "Lower Thershold"
lowerLegend.form = .square
lowerLegend.formColor = UIColor.pmd_red
lineChart.legend.extraEntries =
}
</code></pre>
<p>这里有人熟悉这个库并可以帮助我吗？</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>您可以轻松地在图例类中添加属性 rect 并用颜色填充它。并覆盖 <code>renderLegend(context: CGContext)</code> 您可以在该矩形中填充背景颜色。</p></p>
<p style="font-size: 20px;">关于ios - 如何为图表的图例添加背景颜色，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/44022304/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/44022304/
</a>
</p>
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