04Creating a gradient background view

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To create a background with a gradient you can use the CAGradientLayer class:

Swift 3.1:

func createGradient() { 
    let caLayer = CAGradientLayer()
    caLayer.colors = [UIColor.white, UIColor.green, UIColor.blue]
    caLayer.locations = [0, 0.5, 1]
    caLayer.bounds = self.bounds

This can be called on viewDidLoad() like so:

override func viewDidLoad() {

The CAGradientLayer locations and bounds variables can take multiple values to create a gradient layer with how ever many colors you desire. From the documentation:

By default, the colors are spread uniformly across the layer, but you can optionally specify locations for control over the color positions through the gradient.

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