Set CALayer Gradient Background - objective-c

Question

I am trying to add a gradient to a CALayer I have created. I can set the background colour of the CALayer with the following:
self.colorLayer = [CALayer layer];
[self.colorLayer setBackgroundColor:color.CGColor];
[self.colorView setWantsLayer:YES];
[self.colorView setLayer:self.colorLayer];
I've looked around with no success (surprisingly I thought this would have been answered many times).
I have made a gradient with:
NSGradient *gradient =
[[NSGradient alloc] initWithStartingColor:[NSColor orangeColor]
endingColor:[NSColor lightGrayColor]];
But can't add it to my CALayer or add an angle.

Answer 1

CAGradientLayer *gradient = [CAGradientLayer layer];
gradient.colors = [NSArray arrayWithObjects:(id)[[NSColor whiteColor] CGColor], (id)[[NSColor greenColor] CGColor], nil];
gradient.frame = self.colorView.bounds;
[self.colorView setLayer:gradient];
[self.colorView setWantsLayer:YES];

Answer 2

You don't need to add a gradient to a CALayer, because you can use a CAGradientLayer instead.

Answer 3

Swift 4 version of this answer
let gradient = CAGradientLayer()
gradient.colors = [NSColor.hlpMarineBlue, NSColor.hlpDarkishBlue, NSColor.hlpOceanBlue]
gradient.frame = self.backgroundView.bounds;
self.colorView.layer = gradient
self.colorView.wantsLayer = true

Answer 4

//To Use:
guard let firstColot: NSColor = NSColor(hexString: HexColorCode.code.leftMenuFirstColor.rawValue) else {return}
guard let secondColor: NSColor = NSColor(hexString: HexColorCode.code.leftMenuSecondColor.rawValue) else {return}
leftMenuBgView.gradient(fillView: leftMenuBgView,
withGradientFromColors: [firstColot, secondColor])
extension NSView {
func gradient(fillView view: NSView, withGradientFromColors colors: Array<NSColor>) {
self.wantsLayer = true
let gradientLayer = CAGradientLayer()
gradientLayer.frame = view.bounds
let color1 = colors[0].cgColor
let color2 = colors[1].cgColor
gradientLayer.colors = [color1, color2]
gradientLayer.locations = [0.0, 1.0]
self.layer?.insertSublayer(gradientLayer, at: 0)
}
}