Question

//
//  ViewController.swift
//  TipCalculator
//
//  Created by Mathias Bakken on 6/28/15.
//  Copyright (c) 2015 Mathias Bakken. All rights reserved.
//

我有6-8个实例，我收到错误，因为没有成员tipCalc。我试图制作一个空变量，但这只会让事情变得更糟。

import UIKit

class ViewController: UIViewController {
@IBOutlet var totalTextField : UITextField!
@IBOutlet var servQualitySlider : UISlider!
@IBOutlet var foodQualitySlider : UISlider!
@IBOutlet var servQualityLabel : UILabel!
@IBOutlet var foodQualityLabel : UILabel!
@IBOutlet var resultsTextView : UITextView!
@IBAction func calculateTapped(sender : AnyObject){
    tipCalc.total = Double((totalTextField.text as NSString).doubleValue)
    let possibleTips = tipCalc.returnPossibleTips()
    var results = ""
    for (tipPct, tipValue) in possibleTips{
        results += "\(tipPct)%: \(tipValue)\n"
    }
resultsTextView.text = results
}
@IBAction func servQualityChanged(sender : AnyObject){
    tipCalc.servQuality = Double(servQualitySlider.value)/100.0
    refreshUI()
}
@IBAction func foodQualityChanged(sender : AnyObject){
    tipCalc.foodQuality = Double(foodQualitySlider.value)/100.0
    refreshUI()
}
@IBAction func viewTapped(sender : AnyObject){
    totalTextField.resignFirstResponder()
}
let tipCalc = TipCalculatorModel(total: 33.25, foodQuality: 0.06, servQuality: 0.06)

func refreshUI(){
    totalTextField.text = String(format: "%0.2f", tipCalc.total)
    foodQualitySlider.value = Float(tipCalc.foodQuality) * 100.0
    servQualitySlider.value = Float(tipCalc.servQuality) * 100.0
    foodQualityLabel.text = "Food Quality 1-10 (\(Int(foodQualitySlider.value))%)"
    servQualityLabel.text = "Service Quality 1-10 (\(Int(servQualitySlider.value))%)"
    resultsTextView.text = ""
}

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    refreshUI()
}


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

} 我收到一堆相同的错误消息说＆＃34; ViewController没有名为tipCalc＆＃34的成员;

我也收到错误＆＃34;使用未解析的标识符TipCalculatorModel＆＃34;

如何解决此问题？谢谢！

Answer 1

import Foundation

class TipCalculatorModel{

var total: Double
var foodQuality: Double
var servQuality: Double
var subtotal: Double{
    get{
        return total / (foodQuality + servQuality + 1)
    }
}
init(total: Double, foodQuality: Double, servQuality: Double){
    self.total = total
    self.foodQuality = foodQuality
    self.servQuality = servQuality
}
func calcTipWithTipPct(foodQuality: Double, servQuality: Double)->Double{
    return subtotal * (foodQuality + servQuality)
}
func returnPossibleTips()->[Int:Double]{
    let possibleTipsInferred = [0.15, 0.18, 0.20]
    let possibleTipsExplicit:[Double] = [0.15, 0.18, 0.20]
    var retval = [Int:Double]()
    for possibleTip in possibleTipsInferred{
        let intPct = Int(possibleTip*100)
        retval[intPct] = calcTipWithTipPct(foodQuality, servQuality: servQuality)
    }
    return retval
}

}

我通过粘贴其他模块解决了这个问题。不是很好的修复。但它的确有效。谢谢。

ViewController没有名为tipCalc

1 个答案: