swift 实践- 07 -- UISwitch 开关

import UIKit

class ViewController: UIViewController {

var uiswitch: UISwitch?

override func viewDidLoad() {

super.viewDidLoad()

uiswitch = UISwitch()

// 设置位置 (开关无法设置大小)

uiswitch?.center = CGPoint(x: 100, y: 50)

self.view.addSubview(uiswitch!)

// 设置默认值

uiswitch?.isOn = true

uiswitch?.addTarget(self, action: #selector(switchDidChange), for: .valueChanged)

}

func switchDidChange(){

// 打印当前值

print(uiswitch!.isOn)

}

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

}

}