Add Gradient to Bar Chart - BarChartDataSet

[svgupta97]

I have tried researching trying to figure out how to add a gradient to my bar chart. However I am not able to to implement it. Many people have done something similar to :

let gradientColors = [UIColor.cyan.cgColor, UIColor.clear.cgColor] as CFArray // Colors of the gradient
let colorLocations:[CGFloat] = [1.0, 0.0] // Positioning of the gradient
let gradient = CGGradient.init(colorsSpace: CGColorSpaceCreateDeviceRGB(), colors: gradientColors, locations: colorLocations) // Gradient Object
yourDataSetName.fill = Fill.fillWithLinearGradient(gradient!, angle: 90.0) // Set the Gradient
set.drawFilledEnabled = true // Draw the Gradient

However it seems like this only works for line graphs since .drawFilledEnabled and .fill does not work with BarChartDataSet.

I get the error:
Value of type 'BarChartDataSet' has no member 'drawFilledEnabled' and
Value of type 'BarChartDataSet' has no member 'fill'

Would really appreciate if I can get some help on this! Thank you!!

[liuxuan30]

I'm working on #4411 . wait for it merged.