Coreplot图形沿y轴填充颜色 [英] Coreplot graph fill color along y-axis

问题描述

任何人都可以告诉如何在coreplot图上从y轴4到10绘制深蓝色的蒙面区域，并通过像我在图中显示的那样从X轴出来。 核心图称为背景限制带。有几个示例应用程序中的示例，包括Plot Gallery。

  CPTPlotRange * range = [CPTPlotRange plotRangeWithLocation：CPTDecimalFromDouble（4.0 ）
 length：CPTDecimalFromDouble（6.0）]; 
 CPTFill * bandFill = [CPTFill fillWithColor：[CPTColor blueColor]]; 
 [yAxis addBackgroundLimitBand：[CPTLimitBand limitBandWithRange：range 
 fill：bandFill]]; 
  

![enter image description here][1]

Can anybody tell how to draw dark blue masked area on coreplot graph from y-axis 4 to 10 and through out the x-axis like i showed in the figure.

解决方案

Core Plot calls that a "background limit band". There are examples in several of the example apps, including the Plot Gallery.

CPTPlotRange *range = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromDouble(4.0)
                                                   length:CPTDecimalFromDouble(6.0)];
CPTFill *bandFill = [CPTFill fillWithColor:[CPTColor blueColor]];
[yAxis addBackgroundLimitBand:[CPTLimitBand limitBandWithRange:range
                                                          fill:bandFill]];

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