Default backgroundColor (nil) displays as black instead of clear.

[cpboyd]

As the title states, the default backgroundColor of a view is nil, which shows in the Storyboard as transparent.

It seems counter-intuitive that this would be UIColor.black rather than .clear

Obviously, it's easy to work-around with a simple chartView.backgroundColor = .clear.

However, it seems like the "default" should match other views, which use a clear color.

[liuxuan30]

Just saw

    public override init(frame: CGRect)
    {
        super.init(frame: frame)

		#if os(iOS)
			self.backgroundColor = NSUIColor.clear
		#endif
        initialize()
    }

when init, it will be clear

[cpboyd]

@liuxuan30
Hmm. It doesn't seem to do that when instantiated via a Storyboard.

Perhaps this is relevant?
http://stackoverflow.com/questions/8373176/how-is-view-initialized-when-loaded-via-a-storyboard

Maybe this should also be called from initWithCoder, e.g.:

required init?(coder: NSCoder) {
		super.init(coder: coder)
		#if os(iOS)
			self.backgroundColor = NSUIColor.clear
		#endif
}

[liuxuan30]

I had a PR for this, move the color setter to initialize()

[liuxuan30]

@danielgindi please review this, I am not sure why it's just seen in initWithFrame() or we just missed the storyboard init

[euri16]

I just updated to version 3.0.2 and still have a default black background behind my chart. I added a UIView in storyboard and set the class to LineChartView, modules Charts, what I have to do to remove that black background?

I also have tried doing this:

self.lineChart.backgroundColor = .clear

[liuxuan30]

This change is not in 3.0.2. Pull from master