How can I change the color of a certain point in the chart?

[Chenkai]

When a point exceed a certain value, how can I change it's color ?

The follow is my partial code :

TKChartLineSeries *temperatureSeries = [[TKChartSplineSeries alloc] initWithItems:points];
temperatureSeries.style.pointShape = [[TKPredefinedShape alloc] initWithType:TKShapeTypeCircle andSize:CGSizeMake(7, 7)];
temperatureSeries.xAxis = timeXAxis;
temperatureSeries.yAxis = temperatureYAxis;
temperatureSeries.selectionMode = TKChartSeriesSelectionModeDataPoint;
temperatureSeries.style.shapeMode = TKChartSeriesStyleShapeModeAlwaysShow;

I didn't use the datasource delegate, can I realize it?

By the way, if I use the delegate, how can I make it?

[Jack]

Hi Chenkai,

Yes, in this scenario you should use the chart delegate. The chart:paletteItemForPoint:inSeries: method will do the job. Consider the following sample:

- (TKChartPaletteItem *)chart:(TKChart *)chart paletteItemForPoint:(NSUInteger)index inSeries:(TKChartSeries *)series
{
    id<TKChartData> point = (id<TKChartData>)series.items[index];
    if ([[point dataYValue] floatValue] > 50) {
        TKChartPaletteItem *item = [[TKChartPaletteItem alloc] initWithFill:[TKSolidFill solidFillWithColor:[UIColor redColor]]];
        return item;
    }
    return nil;
}

I hope this helps. Should you have further questions, do not hesitate to ask.

Regards,
Jack
Telerik

[Chenkai]

Thank you for reply, I will try.

[Chenkai]

Hi, jack 

It really work ! thank​s again!