Line Chart View not drawn because Date values in xAxis (not sorted Ascending/Descending) ?

[Mohammed-Elias]

I'm using version 3.0.2 for swift 3
I have this format for the date from the api as String : "2017-11-04 16:48:55"

   ["2017-11-09 14:22:54","2017-11-09 14:22:07","2017-11-09 14:21:20","2017-11-04 18:58:01","2017-11-04 16:48:55","2017-11-04 16:35:00"]

So I convert the string to date through formatter

        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
        dateFormatter.timeZone = TimeZone(abbreviation: "GMT+0:00")

        let date = dateFormatter.date(from: updatedAt)
        let timeInerval = date?.timeIntervalSince1970
        let hour = Int(timeInerval!)
        dates.append(Double(hour))

if I printed the dates array I'll get :

  [1510237374.0, 1510237327.0, 1510237280.0, 1509821881.0, 1509814135.0, 1509813300.0]

        let dateFormatterForXAxis = DateValueFormatter()
        chartView.xAxis.valueFormatter = dateFormatterForXAxis

where DateValueFormatter class :

        import Foundation
        import Charts

        class DateValueFormatter: NSObject, IAxisValueFormatter {

            var dateFormatter: DateFormatter!

            override init() {
                dateFormatter = DateFormatter()
                dateFormatter.dateFormat = "h"
            }

            func stringForValue(_ value: Double, axis: AxisBase?) -> String {
                return dateFormatter.string(from: Date(timeIntervalSince1970: value))
            }
        }

The chartView haven't drawn, because the values not sorted Ascending/Descending
Any ideas how to solve this issue ?

[liuxuan30]

seems you have to make it ordered? I suspect it's because XBounds needs

[Mohammed-Elias]

@liuxuan30 when I use something like xAxisValues = [12,23,44,10,11,22] the chat didn't draw, because the values not sorted ascending.
when I use ascending sorted array the chart drawn with no sweat, otherwise don't.

What should I do with XBounds, could you please explain more ?

[liuxuan30]

need to take a look at Xbounds how it calculates form your x values. But I guess we don't support this. imaging a line that will turn back, kind of wierd?

[Mohammed-Elias]

Thanks for your time man, But I solved it 2 days ago with ChartDataEntry(x: ,y: ,data:) where I generate the values of x through for loop then send the date in data parameter.
and inside the balloon marker I show the date and the price.

Feel free to close this issue ! :)