如何在 iOS 中的图表上默认将自定义视图显示为标记

Question

I am using Charts SDK to show Line graph in my app. I want to display marker for some coordinates of graph by default, (ie, when graph is loaded then by default a custom view marker should be displayed above some coordinates of graph).

I am able to do it when graph is touched and delegate method of Chart SDK is called

chartValueSelected(_ chartView: ChartViewBase, entry: ChartDataEntry, highlight: Highlight)

But, how can i achieve this by default without touching the graph .

I also used LineChartDataSet but it shows circle for those values, but i want to show some custom view instead of circle.

Thank you

Answer 1

You can set a custom icon for data entries by using ChartDataEntry(x:, y:, icon:) initializer

let entry = ChartDataEntry(x: 2, y: 12, icon: UIImage(systemName: "airplane.circle.fill"))

Make sure you have also lineDataSet.drawIconsEnabled = true

let lineDataSet = LineChartDataSet(....)
lineDataSet.drawIconsEnabled = true

Answer 2

as answered by @SamB. I am using Charts SDK in my iOS project. Charts SDK provides functionality to pass image

ChartDataEntry(x: 10, y: 10, data: 20, icon: UIImage(systemName: "imageName"))

In Data field you can paas the position value of those point.