scatter plot Highlighted points using Core-plot in iphone - iphone

Question

My code is below:
- (void)viewDidLoad
{
[super viewDidLoad];
[self generateDataSamples];
CPTGraphHostingView *hostingview=[[CPTGraphHostingView alloc] initWithFrame:self.view.bounds];
[self.view addSubview:hostingview];
graph=[[CPTXYGraph alloc] initWithFrame:self.view.bounds];
hostingview.hostedGraph =graph;
// Border
graph.plotAreaFrame.borderLineStyle = nil;
graph.plotAreaFrame.cornerRadius = 0.0f;
// Paddings
graph.paddingLeft = 0.0f;
graph.paddingRight = 0.0f;
graph.paddingTop = 0.0f;
graph.paddingBottom = 0.0f;
graph.plotAreaFrame.paddingLeft = 70.0;
graph.plotAreaFrame.paddingTop = 20.0;
graph.plotAreaFrame.paddingRight = 20.0;
graph.plotAreaFrame.paddingBottom = 80.0;
CPTMutableLineStyle *lineStyle = [CPTMutableLineStyle lineStyle];
lineStyle.lineColor = [CPTColor blackColor];
lineStyle.lineWidth = 2.0f;
CPTXYPlotSpace *plotSpace = (CPTXYPlotSpace *)graph.defaultPlotSpace;
plotSpace.allowsUserInteraction = NO;
plotSpace.xRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(0.0) length:CPTDecimalFromFloat(7.0)];
plotSpace.yRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(0.0) length:CPTDecimalFromFloat(50.0)];
CPTXYAxisSet *axisSet = (CPTXYAxisSet *)graph.axisSet;
CPTXYAxis *x = axisSet.xAxis;
x.majorIntervalLength = CPTDecimalFromString(#"1.0");
x.orthogonalCoordinateDecimal = CPTDecimalFromString(#"0.0");
x.minorTicksPerInterval =9;
// x.majorGridLineStyle = majorGridLineStyle;
// x.minorGridLineStyle = minorGridLineStyle;
x.title = #"X Axis";
x.titleOffset = 30.0;
x.titleLocation = CPTDecimalFromString(#"1.25");
// Label y with an automatic label policy.
CPTXYAxis *y = axisSet.yAxis;
y.labelingPolicy = CPTAxisLabelingPolicyAutomatic;
y.orthogonalCoordinateDecimal = CPTDecimalFromString(#"0.0");
y.minorTicksPerInterval =9;
y.preferredNumberOfMajorTicks = 8;
//y.majorGridLineStyle = majorGridLineStyle;
// y.minorGridLineStyle = minorGridLineStyle;
y.labelOffset = 10.0;
y.title = #"Y Axis";
y.titleOffset = 30.0;
y.titleLocation = CPTDecimalFromString(#"1.0");
// Set axes
graph.axisSet.axes = [NSArray arrayWithObjects:x, y, nil];
CPTScatterPlot *datasourceLinePlot =[[CPTScatterPlot alloc] init];
datasourceLinePlot.dataSource =self;
[graph addPlot:datasourceLinePlot];
[datasourceLinePlot release];
[graph release];
[hostingview release];
}
This code generate Scatter-plot using Core-plot library in iphone ...!
Code is Working Perfectly below output.
but i am try highlight points no idea....!
I want Highlight x and y value points like dot....!
Help Me with us...!

Answer 1

You can use a plot symbol and add this to your line plot.
Objective-C
CPTPlotSymbol *plotSymbol = [CPTPlotSymbol ellipsePlotSymbol];
plotSymbol.fill = [CPTFill fillWithColor:[CPTColor whiteColor]];
plotSymbol.size = CGSizeMake(10.0, 10.0);
datasourceLinePlot.plotSymbol = plotSymbol;
Swift
let plotSymbol = CPTPlotSymbol.ellipse()
plotSymbol.fill = CPTFill(color: CPTColor.white())
plotSymbol.size = CGSize(width: 10.0, height: 10.0)
datasourceLinePlot.plotSymbol = plotSymbol