How to add multiple gradient color in multiple views in a view controller

Question

I use the code below for gradient color. But when I use that code it colors the whole view controller. It also covers the other contents too like textfield, label, etc. I want to use multiple views with multiple gradient colors in a view controller. Suppose I have three views in a view controller and I want to use three different gradient colors in three different views. Content like label and textfield will appear on the gradient colors.

Here is my code:

func setBackground_view() {
    let gradientLayer = CAGradientLayer()
    let colorTop =  UIColor(red: 44/255.0, green: 156/255.0, blue: 56/255.0, alpha: 1.0).cgColor
    let colorBottom = UIColor(red: 155/255.0, green: 180/255.0, blue: 23/255.0, alpha: 1.0).cgColor

    gradientLayer.colors = [ colorTop, colorBottom]
    gradientLayer.startPoint = CGPoint(x: 1.0, y: 0.5)
    gradientLayer.endPoint = CGPoint(x: 0.0, y: 1.0)
    gradientLayer.frame = self.view.bounds
    self.view.layer.addSublayer(gradientLayer)
    self.view.layer.insertSublayer(gradientLayer, at: 0)
    view.layer.addSublayer(gradientLayer)
}

KLD · Accepted Answer · 2018-04-08 16:49:11Z

1

What you're doing in your example is applying the gradient to self.view which is essentially the root view of the whole ViewController. Not only that, but you're also applying the same gradient onto the self.view multiple times.

What you want is to apply gradients to each element individually, not the self.view itself.

Suppose you've got a UITextfield, then just apply the gradient as you already did, but instead, apply it directly onto the desired object.

textField.layer.insertSublayer(gradientLayer, at: 0)
anyOtherView.layer.insertSublayer(differentGradient, at: 0)

And so on and so forth.

Note: Remember to apply the different gradients to their appropriate views, otherwise all the gradients will be the same.

answered Apr 8, 2018 at 16:49

KLD

1602 silver badges10 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Ladislav · Accepted Answer · 2018-04-08 16:54:41Z

You are adding the sublayer 3 times with

self.view.layer.addSublayer(gradientLayer)
self.view.layer.insertSublayer(gradientLayer, at: 0)
view.layer.addSublayer(gradientLayer)

Just do

func setBackground_view() {
    let gradientLayer = CAGradientLayer()
    let colorTop =  UIColor(red: 44/255.0, green: 156/255.0, blue: 56/255.0, alpha: 1.0).cgColor
    let colorBottom = UIColor(red: 155/255.0, green: 180/255.0, blue: 23/255.0, alpha: 1.0).cgColor

    gradientLayer.colors = [ colorTop, colorBottom]
    gradientLayer.startPoint = CGPoint(x: 1.0, y: 0.5)
    gradientLayer.endPoint = CGPoint(x: 0.0, y: 1.0)
    gradientLayer.frame = self.view.bounds
    view.layer.insertSublayer(gradientLayer, at: 0)
}

Basically you want to have the gradientLayer below all other views that are added in the view controller, that is why you insert it as the bottom most layer by inserting it at index 0.

Collectives™ on Stack Overflow

How to add multiple gradient color in multiple views in a view controller

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related