How to Change Opacity of Selected background color of View using UISlider?

Question

I want to create custom colour picker according to my requirement. I do not want to go with third party. How can I increase or decrease the opacity of particular when slider value is changed?

screenshot is below:

Answer 1

After you set up your slider and create a connection to the value change like so....

Then change the minimum and maximum values of the slider to 0 to 1

then implement this inside your sliderValueChanged handler

@IBAction func sliderValueChanged(sender: UISlider) {
     var currentValue = Int(sender.value)

     self.view.backgroundColor = UIColor(white: 1, alpha: sender.value)
}