I am using IGChart in one of my IOS projects and couldn't find how to display legend view on it. I have checked the infragistics SDK but the given 2 lines of code snippet regarding how to use legend with IGChart is not clear. So if you could add an example about legend usage with IGChart I will be pleased. Also here is what I am doing with Objective C:

@property (strong, nonatomic) IGLegend *chartLegend;

Firstly, I am initialising the legend within a function.

self.chartLegend = [[IGLegend alloc] initWithLegendType:IGChartLegendTypeSeries];
[self.chartLegend setFrame:CGRectMake(10, 10, 200, 100)];
self.chartLegend.translatesAutoresizingMaskIntoConstraints = NO;
self.chartLegend.backgroundColor = [MyColor gray25];
self.chartView.legend = self.chartLegend;
[self.view addSubview:self.chartLegend];

In another function I am adding my IGLineSeries to my chart:

IGCategorySeriesDataSourceHelper *categorySource = [[IGCategorySeriesDataSourceHelper alloc] init];
categorySource.data = lineChartArr;
categorySource.valuePath = @"close";
categorySource.labelPath = @"date";

        lineSeries = [[IGLineSeries alloc] initWithKey:@"chartSeries"];

        lineSeries.xAxis = xAxis;

        lineSeries.yAxis = yAxis;

        lineSeries.yAxis.minimum = -20;

        lineSeries.yAxis.maximum = 20;

        lineSeries.dataSource = categorySource;

        lineSeries.xAxis.majorStrokeThickness = 0.6f;

        lineSeries.yAxis.majorStrokeThickness = 0.6f;

        lineSeries.xAxis.majorStroke = [[IGBrush alloc]initWithColor:[MyColor gray25]];

        lineSeries.yAxis.majorStroke = [[IGBrush alloc]initWithColor:[MyColor gray25]];

        lineSeries.title = title;

        lineSeries.legendItemIsVisible = YES;

        lineSeries.legend = self.chartLegend;

        [self.chartView addSeries:lineSeries];

So what am I doing wrong? These codes only display a gray view without the titles. Thanks for your answers.