IPhone CorePlot: Touch Custom Event Chart

Question

Now I use Core-plot to develop the application. I’m looking for some kind of touch event for a user touching one point of the chart, then he shows the price.

When I look at the CorePlot site, It has an application showing what I need http://code.google.com/p/core-plot/wiki/AppsUsingCorePlot

I really want to execute this function using Core-plot, now I am using CorePlot 0.4 I want to make the following function

I really want to have a touch event that can show the price of the touch price of a user's point.

Thank you very much!

Answer 1

CorePlot provides many ways to detect user touch:

For charts:

-(void)barPlot:(CPBarPlot *)plot barWasSelectedAtRecordIndex:(NSUInteger)index; -(void)scatterPlot:(CPScatterPlot *)plot plotSymbolWasSelectedAtRecordIndex:(NSUInteger)index; -(void)pieChart:(CPPieChart *)plot sliceWasSelectedAtRecordIndex:(NSUInteger)index; 

For sketching space:

 @protocol CPPlotSpaceDelegate <NSObject> -(BOOL)plotSpace:(CPPlotSpace *)space shouldHandlePointingDeviceDownEvent:(id)event atPoint:(CGPoint)point; -(BOOL)plotSpace:(CPPlotSpace *)space shouldHandlePointingDeviceDraggedEvent:(id)event atPoint:(CGPoint)point; -(BOOL)plotSpace:(CPPlotSpace *)space shouldHandlePointingDeviceUpEvent:(id)event atPoint:(CGPoint)point; 

Answer 2

The Mac CPTTestApp sample program included with Core Plot shows how to do what you describe. Watch a demonstration of selecting points in the View menu.

Answer 3

use gesture recolonization for this, it works great. First touch the u screen and the second skin.