Set diffent style to single line graph

[ajaysinghthakur]

trying to achieve below and is available in android

http://stackoverflow.com/questions/33011210/set-diffent-style-to-single-line-graph-in-mpandroidchart

[liuxuan30]

This just requires you to override drawLinear to use different line dash for each segment.

[liuxuan30]

Or, make two line data sets, one is solid and one is dashed, and use

    /// This is how much (in pixels) into the dash pattern are we starting from.
    var lineDashPhase: CGFloat { get }
    
    /// This is the actual dash pattern.
    /// I.e. [2, 3] will paint [--   --   ]
    /// [1, 3, 4, 2] will paint [-   ----  -   ----  ]
    var lineDashLengths: [CGFloat]? { get set }

in LineChartDataSet (from ILineChartDataSet).