Ios 从CPTSatterPlot委托中选择了绘图符号

如何连接绘图SYMBOL从CPTSatterPlot委托方法中选择TrecordIndex。当我点击散点图的索引时，它不会呈现给该方法。为什么？你能帮帮我吗？谢谢你，一定要先采用协议。因此，在您的

.h

文件中声明如下：

#import "CorePlot-CocoaTouch.h"
// CPTPlotSpaceDelegate is optional, used for other things, and of course CPTPlotDataSource is mandatory, and for your purpose, CPTScatterPlotDelegate is also mandatory
@interface ViewController : UIViewController <CPTPlotSpaceDelegate, CPTPlotDataSource, CPTScatterPlotDelegate> { 

}

---

如何添加delegate方法？我使用了cptspatterplotdelegate*delegateObj=[cptspatterplotdelegate alloc]init]；和delegateObj.delegate=self；和delegateObj.PlotSymbolMarginInforHitDetection=10.0f；但不起作用我已经在view didLoad方法中添加了这些代码

self.linePlot = [[CPTScatterPlot alloc] init];
self.linePlot.delegate = self;

-(void)scatterPlot:(CPTScatterPlot *)plot plotSymbolWasSelectedAtRecordIndex:(NSUInteger)index {
    // Your logic here
}