How to make a background 25% transparent on iOS

Apple provides backgroundColor which is an instance property, Changes to this property can be animated. The default value is nil, which results in a transparent background color.

To make background 25% transparent we should  set the view to the UIColor with alpha 0.25

view.backgroundColor = UIColor(white: 1, alpha: 0.25)

You can write the following code in your ViewController’s viewDidLoad method.

Your code should look like below.

override func viewDidLoad() {
   super.viewDidLoad()
   view.backgroundColor = UIColor(white: 1, alpha: 0.25)
}