iOS White to Transparent Gradient Layer is Gray

Question

I have a CAGradientLayer inserted to the bottom of this small detail view that pops up at the bottom of the app. As you can see, I\'ve set the colors from white to clear, but th

Answer 1

Worth pointing out that any other colour will work like this... using a combination of the two answers above....

Objective C

UIColor *colour = [UIColor redColor];
NSArray *colourArray = @[(id)[colour colorWithAlphaComponent:0.0f].CGColor,(id)colour.CGColor]
NSArray *locations = @[@0.2,@0.8];

CAGradientLayer *gradientLayer = [CAGradientLayer layer];
gradientLayer.colors = colourArray;
gradientLayer.locations = locations;
gradientLayer.frame = self.frame;

[self.layer addSublayer:gradientLayer];

Swift 3

let colour:UIColor = .red
let colours:[CGColor] = [colour.withAlphaComponent(0.0).cgColor,colour.cgColor]
let locations:[NSNumber] = [0.2,0.8]

let gradientLayer = CAGradientLayer()
gradientLayer.colors = colours
gradientLayer.locations = locations
gradientLayer.frame = frame

layer.addSublayer(gradientLayer)