#6 調色大師

GitHub - kmjnhgithub/ChangeColor

使用元件如下：

1. UIImageView
2. UISlider
3. UIButton
4. UIColor

多個UISlider共用一個func changeColor，改變單一UIImageView的background color

接著抓取每個UISlider的值，需要把它拉出outlet

抓到UISlider的值後分別放入UIColor裏面再指定給UIImageView

@IBAction func changeColor(_ sender: UISlider) {
        // 改變顏色
        anyaImageView.backgroundColor = UIColor(
            red: CGFloat(redSlider.value), 
            green: CGFloat(greenSlider.value), 
            blue: CGFloat(blueSlider.value), 
            alpha: CGFloat(alphaSlider.value)
      )
    }

隨機顏色則是使用.random後分別指定給個別的UISlider

@IBAction func randomButton(_ sender: UIButton) {
        //設定亂數
        redSlider.value = Float.random(in: 0...1)
        greenSlider.value = Float.random(in: 0...1)
        blueSlider.value = Float.random(in: 0...1)
        alphaSlider.value = Float.random(in: 0...1)
        anyaImageView.backgroundColor = UIColor(
            red: CGFloat(redSlider.value),
            green: CGFloat(greenSlider.value),
            blue: CGFloat(blueSlider.value),
            alpha: CGFloat(alphaSlider.value)
        )
    }