Customizing drawings
Create custom colors and patterns for drawing in your app.
Overview
You can customize the colors in your app, including the background and tint colors and the drawing styles available to users of your app.
Set custom background and tint colors
The most common way to use a UIColor object is to include it with some other object in UIKit. Including UIColor with an object in UIKit allows you to create and customize the UI of your app. For example, the UIView class (and its descendants) includes background and tint colors to affect how they’re drawn onscreen. The following code example sets the background and tint color of a view.
backgroundView.backgroundColor = UIColor.systemGray
backgroundView.tintColor = UIColor.systemBlueCreate custom colors and drawing styles
When customizing drawings in your app, a UIColor object provides methods that set the fill or stroke colors of the current graphics context. These methods can set the color of an object and create various patterns and styles. The following code shows a simple example of a custom drawing inside a view.
class CircleView: UIView {
override func draw(_ rect: CGRect) {
let ovalBounds = self.bounds.insetBy(dx: 10, dy: 10)
let oval = UIBezierPath(ovalIn: ovalBounds)
let brightRed = UIColor(displayP3Red: 1.0, green: 0.0, blue: 0.0, alpha: 1.0)
brightRed.setFill()
oval.fill()
}
}