單向非即時的基本匯率app 💰

👀操作畫面：

✏️程式碼：

import UIKit
class ViewController: UIViewController {
@IBOutlet weak var moneySegCtrl: UISegmentedControl!
@IBOutlet weak var photoSwitch: UISwitch!
@IBOutlet weak var moneyLabel: UILabel!
@IBOutlet weak var MoneyInput: UITextField!
@IBOutlet weak var moneyOutput: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
//調整segmentedControl字型
moneySegCtrl.setTitleTextAttributes([.font: UIFont(name: "Nagurigaki-Crayon", size: 22)], for: .normal)
}
//UIswitch，segment上的文字變圖案

@IBAction func switchPhote(_ sender: UISwitch) {
if (sender.isOn == false) {
moneySegCtrl.setImage(UIImage(named: "US.png"), forSegmentAt: 0)
moneySegCtrl.setImage(UIImage(named: "GBP.png"), forSegmentAt: 1)
moneySegCtrl.setImage(UIImage(named: "JP.png"), forSegmentAt: 2)
moneySegCtrl.setImage(UIImage(named: "EUR.png"), forSegmentAt: 3)
} else{
moneySegCtrl.setTitle("美金", forSegmentAt: 0)
moneySegCtrl.setTitle("英GBP", forSegmentAt: 1)
moneySegCtrl.setTitle("日幣", forSegmentAt: 2)
moneySegCtrl.setTitle("EUR", forSegmentAt: 3)
}
}
//segmentcontrol換moneylabel文字標籤
@IBAction func changeMoneyLabel(_ sender: UISegmentedControl) {
if sender.selectedSegmentIndex == 0{
moneyLabel.text = "美金"
}else if sender.selectedSegmentIndex == 1{
moneyLabel.text = "英GBP"}else if sender.selectedSegmentIndex == 2{
moneyLabel.text = "日幣"}else{
moneyLabel.text = "EUR"}
}
//按下按鈕計算匯率

@IBAction func buttonExcMoney(_ sender: Any) {

//一按下計算button，鍵盤收回
MoneyInput.resignFirstResponder()
moneyOutput.resignFirstResponder()

var price = Double(MoneyInput.text!)
//currency變數直接在func中建立，不用另外宣告
func priceExchange (currency:Double){
if price != nil{
let ntPrice = price! * currency
//只要計算到小數點第二位
let ntPriceString = String(format: "%.2f", ntPrice)
moneyOutput.text = ntPriceString
}
}
if moneySegCtrl.selectedSegmentIndex == 0{
priceExchange(currency: 30.5)
}else if moneySegCtrl.selectedSegmentIndex == 1{
priceExchange(currency: 37.5)
}else if moneySegCtrl.selectedSegmentIndex == 2{
priceExchange(currency: 0.27)
}else {
priceExchange(currency: 32.7)
}
}

//清空數字clear按鈕
@IBAction func buttonClear(_ sender: Any) {
MoneyInput.text = ""
moneyOutput.text = ""
}
}

下次想要改進的地方：

1. 變成可雙向計算的即時匯率app
2. 用array和for迴圈讀取segmented control圖片
3. 再多研究幾個鍵盤收回的方式

😃 😃