**第一學習使用ui swift寫ui控制元件的控制程式碼，記錄學習
UIButton和UISlider的一個小案例

ViewController.swift

//
//  ViewController.swift
//  uiTesting
//
//  Created by Friderick_Lee on 2017/12/19.
//  Copyright © 2017年 Friderick_Lee. All rights reserved.
//

import UIKit

class ViewController: UIViewController {
    @IBOutlet weak var label: UILabel!
    @IBOutlet weak
 
 var lab: UILabel!
    @IBOutlet weak var lav: UILabel!
    var v = 0
    var i = 0
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    @IBAction func d(_ sender: UISlider) {
        label.text="\(sender.value)"
 

        v=Int(sender.value)
        lav.text="\(i+v)"
    }


    @IBAction func btn(_ sender: UIButton) {
        i=i+1
        lab.text="\(i)"
        lav.text="\(i+v)"
    }


    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
 

    }


}

Main.storyboard

效果圖