範例：撥打電話

Objective

學習使用 Button 元件，同時處理多按鈕共用事件

Lab

1. 建立 Single View Application
2. UI 設計

在此畫面需加入 2 張 image，一個作為 Phone Call，另一個為 Phone Hangup

Code

//

//  ViewController.swift

//  MyPhoneDemo

//

//  Created by Elvis Meng on 2017/5/5.

//  Copyright © 2017年 Elvis Meng. All rights reserved.

//

import UIKit

var str:String = ""

class ViewController: UIViewController {

    @IBOutlet weak var displayPhoneNumber: UILabel!

    

    @IBAction func tapDigitPad(_ sender: UIButton) {

        str = str + (sender.titleLabel?.text)!

        displayPhoneNumber.text = str

    }

    

    @IBAction func phoneCall(_ sender: UIButton) {

        let url = URL(string: "tel:"+str)

        if #available(iOS 10.0, *) {

            UIApplication.shared.open(url!, options: [:], completionHandler: nil)

        } else {

            UIApplication.shared.openURL(url!)

        }

    }

    

    @IBAction func phoneHangUp(_ sender: UIButton) {

        str = ""

        displayPhoneNumber.text = ""

    }

    

    override func viewDidLoad() {

        super.viewDidLoad()

        // Do any additional setup after loading the view, typically from a nib.

    }

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

        // Dispose of any resources that can be recreated.

    }

}

Test

Summary

此範例並處理 Phone Call，也處理 Phone Up


 /end