＃7 if else練習 | 擇偶條件App-波士頓派

練習目的：學習 IBOutlet，IBAction 和 if else

現在網路發達很多商店都用app來點餐，製作一個點波士頓派的app畫面

先將需要的text field，segmented control，switch設置好

選擇波士頓派口味的segmented control

 @IBAction func changflavor(_ sender: UISegmentedControl) {
        if changseg.selectedSegmentIndex == 0 {
            cake = "芒果波士頓派" }
        else if
            changseg.selectedSegmentIndex == 1{
            cake = "芋頭波士頓派"}
        else{ cake = "布丁波士頓派"
        }
    }

是否加購購物袋的switch

 @IBAction func bagswitch(_ sender: UISwitch) {
        if bagswitch.isOn { bag = "加購購物袋"}
        else {bag = "不加購購物袋"
            }
        
    }

控制波士頓派大小的slider

先在storyboard將slider的最大最小值設定好，尺寸小中大為1~3

    @IBAction func ordersize(_ sender: UISlider) {
        sender.value.round()
        if sender.value == 1
        {sizelabel.text = "小"}
        else if sender.value  == 2
        {sizelabel.text = "中"}
        else {sizelabel.text = "大"
        }
    }

送出訂單button

加入確認後消除鍵盤的程式在最後一行，按下確認會縮起鍵盤

 @IBAction func orderbutton(_ sender: UIButton) {
        let name = nametext.text
        if name == "" {textlabel.text = "請輸入姓名"}
        else if bagswitch.isOn == true
        {textlabel.text = nametext.text!+"\n" + bag+"\n" + sizelabel.text! + cake}
        else
        {textlabel.text = nametext.text!+"\n" + bag+"\n" + sizelabel.text! + cake}
        view.endEditing(true)
    }

成品

完整程式碼

import UIKit

class ViewController: UIViewController {
    
    @IBOutlet weak var nametext: UITextField!
    
    @IBOutlet weak var order: UIButton!
   @IBOutlet weak var sizeslider: UISlider!
    
    @IBOutlet weak var bagswitch: UISwitch!
    
    @IBOutlet weak var sizelabel: UILabel!
    
    @IBOutlet weak var textlabel: UILabel!
    
    
    
    @IBOutlet weak var changseg: UISegmentedControl!
    
    
    var cake = ""
    var bag = ""

    
    
    
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        
        
        
    }
    
    @IBAction func changflavor(_ sender: UISegmentedControl) {
        if changseg.selectedSegmentIndex == 0 {
            cake = "芒果波士頓派" }
        else if
            changseg.selectedSegmentIndex == 1{
            cake = "芋頭波士頓派"}
        else{ cake = "布丁波士頓派"
        }
    }
    
    @IBAction func ordersize(_ sender: UISlider) {
        sender.value.round()
        if sender.value == 1
        {sizelabel.text = "小"}
        else if sender.value  == 2
        {sizelabel.text = "中"}
        else {sizelabel.text = "大"
        }
    }
    
    @IBAction func bagswitch(_ sender: UISwitch) {
        if bagswitch.isOn { bag = "加購購物袋"}
        else {bag = "不加購購物袋"
            }
        
    }
    
    @IBAction func orderbutton(_ sender: UIButton) {
        let name = nametext.text
        if name == "" {textlabel.text = "請輸入姓名"}
        else if bagswitch.isOn == true
        {textlabel.text = nametext.text!+"\n" + bag+"\n" + sizelabel.text! + cake}
        else
        {textlabel.text = nametext.text!+"\n" + bag+"\n" + sizelabel.text! + cake}
        view.endEditing(true)
    }
   
}

GitHub - gawer521n52/10