import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {

        super.viewDidLoad()

        let slider = UISlider.init(frame: CGRect.init(x: 0, y: 0, width: 300, height: 50))

        slider.center = self.view.center

        slider.minimumValue = 0

        slider.maximumValue = 1

        slider.value = 0.5

        self.view.addSubview(slider)

        // 设置滑块的值  有动画

        slider.setValue(0.5, animated: true)

        // 滑块值改变响应

        slider.isContinuous = false // 滑块滑动停止之后才会触发 ValueChanged 事件

        slider.addTarget(self, action: #selector(sliderChange(slider:)), for: .valueChanged)

        // 滑块左右两边槽的颜色

        slider.minimumTrackTintColor = UIColor.red

        slider.maximumTrackTintColor = UIColor.green

        // 滑块后面槽线两侧添加图标

        slider.minimumValueImage=UIImage(named:"2")  //左边图标

        slider.maximumValueImage=UIImage(named:"2")  //右边图标

        //设置滑块的图片

        slider.setThumbImage(UIImage(named:"2"),for:.normal)

    }

    func sliderChange(slider:UISlider){

        print(slider.value)

    }

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

        // Dispose of any resources that can be recreated.

    }

}