#7 調色大師

storyboard設計應用

GIF:

程式碼如下

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var casifaView: UIView!
    @IBOutlet weak var redSlider: UISlider!
    @IBOutlet weak var greenSlider: UISlider!
    @IBOutlet weak var blueSlider: UISlider!
    @IBOutlet weak var redLabel: UILabel!
    @IBOutlet weak var blueLabel: UILabel!
    @IBOutlet weak var greenLabel: UILabel!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        
        let image = UIImage(named: "casifa1")
           let casifaImageView = UIImageView(image: image)
        casifaImageView.frame = casifaView.bounds
        casifaView.mask = casifaImageView
    }
    @IBAction func chageColor(_ sender: Any) {casifaView.backgroundColor = UIColor(red: CGFloat(redSlider.value/255), green: CGFloat(greenSlider.value/255), blue: CGFloat(blueSlider.value/255), alpha: 1)
           redLabel.text = String(format:"%.0f", redSlider.value)
           greenLabel.text = String(format:"%.0f", greenSlider.value)
           blueLabel.text = String(format:"%.0f", blueSlider.value)
       }
       @IBAction func random(_ sender: Any) {
           casifaView.backgroundColor = UIColor(red: CGFloat(redSlider.value/255), green: CGFloat(greenSlider.value/255), blue: CGFloat(blueSlider.value/255), alpha: 1)
           redSlider.value = Float.random(in: 0...255)
           greenSlider.value = Float.random(in: 0...255)
           blueSlider.value = Float.random(in: 0...255)
           redLabel.text = String(format:"%.0f", redSlider.value)
           greenLabel.text = String(format:"%.0f",greenSlider.value)
           blueLabel.text = String(format:"%.0f", blueSlider.value)
   }

}