嘿大家我需要一些帮助,我的代码 当我在设置中选择默认提示率并返回时,百分比标签似乎乘以100。 我发了一封电子邮件给教授,他告诉我:
(("它看起来像是因为你将默认提示率保存为" 20"而不是" 0.20"所以当你乘以时通过" 100"你得到" 2000"而不是" 20"。")))有几种方法可以解决这个问题,但最简单的方法是在计算小费金额时要除以100。
我会感谢有人帮我制作我需要将金额除以100的代码行。 下面我将留下我的代码的一些截图。 视图的屏幕截图按顺序排列:
这是我的MainViewController代码
import UIKit
class ViewController: UIViewController, SettingsDelegate {
// Inputs
@IBOutlet weak var amountTextField: UITextField!
//Labels
@IBOutlet weak var TipPercentageLabel: UILabel!
@IBOutlet weak var numberOfPersonLabel: UILabel!
@IBOutlet weak var tipAmountLabel: UILabel!
@IBOutlet weak var totalBillLabel: UILabel!
@IBOutlet weak var billPerPersonLabel: UILabel!
//Slider & Stepper
@IBOutlet weak var tipSlider: UISlider!
@IBOutlet weak var personsStepper: UIStepper!
//Variables
var tipPercentage : Double = NSUserDefaults.standardUserDefaults().doubleForKey("DefaultTipRate") ?? 0.20
var numberOfPerson:Int = 1
let numberFormatter:NSNumberFormatter = NSNumberFormatter()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
tipAmountLabel.text = "$0.00"
totalBillLabel.text = "Bill Total"
billPerPersonLabel.text = "$0.00"
numberOfPersonLabel.text = "1"
self.amountTextField.becomeFirstResponder()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func setupContainer() {
tipSlider.minimumValue = 0
tipSlider.maximumValue = 100
tipSlider.value = 20
tipSlider.addTarget(self, action: "sliderTipChanged:", forControlEvents: .ValueChanged)
personsStepper.minimumValue = 1
personsStepper.maximumValue = 30
personsStepper.value = 1
personsStepper.addTarget(self, action: "sliderPersonChanged:", forControlEvents: .ValueChanged)
amountTextField.text = ""
refreshCalculation()
}
@IBAction func OnEditingFieldBill(sender: AnyObject) {
refreshCalculation()
}
func refreshCalculation() {
numberFormatter.numberStyle = NSNumberFormatterStyle.DecimalStyle
if let amount = numberFormatter.numberFromString(amountTextField.text!) as? Double {
let tipAmount = amount * tipPercentage
let totalBill = amount + tipAmount
let billPerPerson = totalBill / Double(numberOfPerson)
numberFormatter.numberStyle = NSNumberFormatterStyle.CurrencyStyle
tipAmountLabel.text = numberFormatter.stringFromNumber(tipAmount)
totalBillLabel.text = numberFormatter.stringFromNumber(totalBill)
billPerPersonLabel.text = numberFormatter.stringFromNumber(billPerPerson)
} else {
tipAmountLabel.text = "-"
totalBillLabel.text = "-"
billPerPersonLabel.text = "-"
}
numberFormatter.numberStyle = NSNumberFormatterStyle.PercentStyle
numberFormatter.minimumFractionDigits = 1
numberFormatter.maximumFractionDigits = 1
TipPercentageLabel.text = self.numberFormatter.stringFromNumber(tipPercentage)
numberOfPersonLabel.text = "\(numberOfPerson)"
}
@IBAction func sliderTipChanged(sender: UISlider) {
tipPercentage = Double(round(tipSlider.value)) / 100
refreshCalculation()
}
@IBAction func StepperPersonChanged(sender: UIStepper) {
numberOfPerson = Int(round(personsStepper.value))
refreshCalculation()
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if let SettingsViewController = segue.destinationViewController as? SettingsViewController {
SettingsViewController.delegate = self
refreshCalculation()
}
}
func tipPercentageChanged(newValue: Double) {
TipPercentageLabel.text = "\(newValue)%"
tipPercentage = newValue
refreshCalculation()
}
}
以下是设置视图代码
import UIKit
protocol SettingsDelegate{
func tipPercentageChanged(newValue : Double)
}
class SettingsViewController: UIViewController {
@IBOutlet weak var tipControl: UISegmentedControl!
var tipRates: Double?
var destName : String!
var delegate :SettingsDelegate?
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
@IBAct
答案 0 :(得分:1)
在设置视图中,它应该足以更改,因为您已经为其指定了正确的费率名称,您还应该使其成为费率
var tipRate = [5, 10, 15, 20, 25, 30]
到
var tipRate = [0.05, 0.10, 0.15, 0.20, 0.25, 0.30]
你也可以摆脱下一行的演员阵容,因为它不需要。