         // 滑条
         self.addSubview(greySlider)
         self.addSubview(alphaSlider)
+        
+        // 自定义滑条
+        greySlider.setThumbImage(getThumbImage(radius: 10), for: .normal)
+        
+        alphaSlider.setMinimumTrackImage(getTrackImage(color: UIColor.white, height: 4), for: .normal)
+        alphaSlider.setMaximumTrackImage(getTrackImage(color: UIColor.white, height: 4), for: .normal)
+        alphaSlider.setThumbImage(getThumbImage(radius: 10), for: .normal)
+        
         greySlider.translatesAutoresizingMaskIntoConstraints = false
         alphaSlider.translatesAutoresizingMaskIntoConstraints =  false
         self.addConstraint(NSLayoutConstraint.init(item: greySlider, attribute: .centerX, relatedBy: .equal, toItem: self, attribute: .centerX, multiplier: 1, constant: 0))

    
}




