ios – 如何在Swift中更改UISegmentedControl的选定段tintColor

我想在 Swift 3中更改UISegmentedControl选定段的tintColor.
我在 Objective-c中搜索了很多答案……
这是我的代码：

class ViewController:UIViewController{

var segment:UISegmentedControl

override func viewDidLoad() {
super.viewDidLoad()

segment.insertSegment(withTitle: "AAA", at: 0, animated: true)
segment.insertSegment(withTitle: "BBB", at: 1, animated: true)
segment.insertSegment(withTitle: "CCC", at: 2, animated: true)

segment.addTarget(self, action: #selector(changeValue), for: .valueChanged)
segment.selectedSegmentIndex = 0

view.addSubview(segment)

}
  func changeValue(sender:AnyObject) {

  //I don't know how to do that change color when segment selected
  // 

}

}

谢谢！

以编程方式更改段的色调,

segment.tintColor = UIColor.yellow