核心数据线标签 [英] core data line labels

问题描述

我已经使用Core Plot创建了一个CPScatterPlot，并且在图形上有几条线：

  for（int i = 0; i< nLines; ++ i）{
 CPScatterPlot * xSquaredPlot = [[[[CPScatterPlot alloc] initWithFrame：graph.frame] autorelease]; 
 xSquaredPlot.identifier = [NSString stringWithFormat：@％d，i]; 
 xSquaredPlot.dataLineStyle.lineWidth = 1.0f; 
 xSquaredPlot.name = @ dd; 
 
 if（i == 0）
 xSquaredPlot.dataLineStyle.lineColor = [CPColor redColor]; 
 else if（i == 1）
 xSquaredPlot.dataLineStyle.lineColor = [CPColor blueColor]; 
 else 
 xSquaredPlot.dataLineStyle.lineColor = [CPColor greenColor]; 
 
 xSquaredPlot.dataSource =自我; 
 [graph addPlot：xSquaredPlot]; 
 
 CPPlotSymbol * greenCirclePlotSymbol = [CPPlotSymbol ellipsePlotSymbol]; 
 if（i == 0）
 greenCirclePlotSymbol.fill = [CPFill fillWithColor：[CPColor blueColor]]; 
 else if（i == 1）
 greenCirclePlotSymbol.fill = [CPFill fillWithColor：[CPColor greenColor]]; 
 else 
 greenCirclePlotSymbol.fill = [CPFill fillWithColor：[CPColor redColor]]; 
 
 greenCirclePlotSymbol.size = CGSizeMake（2.0，2.0）; 
 
 xSquaredPlot.plotSymbol = greenCirclePlotSymbol; 
} 
  

行显示很好，但我似乎找不到办法

对此有任何想法吗？

谢谢

解决方案

更新：CorePlot 0.4的类为CPTLegend：

  _graph.legend = [CPTLegend legendWithGraph：_graph]; 
 _graph.legend.textStyle = x.titleTextStyle; 
 _graph.legend.fill = [CPTFill fillWithColor：[CPTColor darkGrayColor]]; 
 _graph.legend.borderLineStyle = x.axisLineStyle; 
 _graph.legend.cornerRadius = 5.0; 
 _graph.legend.swatchSize = CGSizeMake（25.0，25.0）; 
 _graph.legendAnchor = CPTRectAnchorBottom; 
 _graph.legendDisplacement = CGPointMake（0.0，12.0）; 
  

请参阅CorePlot_0.4 / Source / examples / CorePlotGallery / src / plots / SimpleScatterPlot.m。

I have created a CPScatterPlot using Core Plot and have several lines on the graph:

  for(int i=0; i<nLines; ++i){
  CPScatterPlot *xSquaredPlot = [[[CPScatterPlot alloc] initWithFrame:graph.frame] autorelease];
  xSquaredPlot.identifier = [NSString stringWithFormat:@"%d",i];
  xSquaredPlot.dataLineStyle.lineWidth = 1.0f;
  xSquaredPlot.name = @"dd";

  if(i==0)
   xSquaredPlot.dataLineStyle.lineColor = [CPColor redColor];
  else if (i ==1)
   xSquaredPlot.dataLineStyle.lineColor = [CPColor blueColor];
  else 
   xSquaredPlot.dataLineStyle.lineColor = [CPColor greenColor];

  xSquaredPlot.dataSource = self;
  [graph addPlot:xSquaredPlot];

  CPPlotSymbol *greenCirclePlotSymbol = [CPPlotSymbol ellipsePlotSymbol];
  if(i==0)
   greenCirclePlotSymbol.fill = [CPFill fillWithColor:[CPColor blueColor]];
  else if (i ==1)
   greenCirclePlotSymbol.fill = [CPFill fillWithColor:[CPColor greenColor]];
  else 
   greenCirclePlotSymbol.fill = [CPFill fillWithColor:[CPColor redColor]];

  greenCirclePlotSymbol.size = CGSizeMake(2.0, 2.0);

  xSquaredPlot.plotSymbol = greenCirclePlotSymbol;
 }

The lines show up great, but I can't seem to find a way to label each line with it's title, or provide a legend.

Any ideas on this?

Thanks in advance!

解决方案

Update: CorePlot 0.4 has the class CPTLegend:

_graph.legend = [CPTLegend legendWithGraph:_graph];
_graph.legend.textStyle = x.titleTextStyle;
_graph.legend.fill = [CPTFill fillWithColor:[CPTColor darkGrayColor]];
_graph.legend.borderLineStyle = x.axisLineStyle;
_graph.legend.cornerRadius = 5.0;
_graph.legend.swatchSize = CGSizeMake(25.0, 25.0);
_graph.legendAnchor = CPTRectAnchorBottom;
_graph.legendDisplacement = CGPointMake(0.0, 12.0);

See CorePlot_0.4/Source/examples/CorePlotGallery/src/plots/SimpleScatterPlot.m.

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