How to add marker to center position in ios charts while scrolling horizontally with increasing scaleX and enabling drag

[hananRiazz]

I am scrolling chart horizontally by increasing scaleX value and enabled drag as described in answer of this question

https://stackoverflow.com/questions/36884745/set-an-horizontal-scroll-to-my-barchart-in-swift/36907495#36907495

I want to add marker at center position when user scrolls horizontally. I know "chartTranslated" delegate is called whenever user drags the chart but it doesn't contain the value of "ChartDataEntry" and "Highlighted" like in "chartValueSelected" delegate method.

[liuxuan30]

markers has nothing to do with your scale or scrolling. To draw markers you only need to give highlight object

    /// draws all MarkerViews on the highlighted positions
    internal func drawMarkers(context: CGContext)

But notice if you want to use marker not on what you have highlighted, you may need to create another highlight object and manually passed to

// callbacks to update the content
marker.refreshContent(entry: e, highlight: highlight) 
// draw the marker
marker.draw(context: context, point: pos)

And you also may need to override some method or change the source code. Always remember the library can't satisfy everyone's demand, so don't think the library can do anything you want without changing the source code or override

Also remember ChartMarker is protocol now, it's highly flexible
public protocol IMarker: NSObjectProtocol

[hananRiazz]

Thanks a lot for your support.