我正在創建一個溫度轉換器。當我運行應用程序時;輸入溫度,選擇轉換並點擊轉換。出現錯誤。 錯誤是:EXC_BAD_INSTRUCTION(代碼= EXC_I386_INVOP,子碼=爲0x0)EXC_BAD_INSTRUCTION(code = EXC_I386_INVOP,subcode = 0x0)
這是我的代碼視圖控制器:
import UIKit
class ViewController: UIViewController,UIPickerViewDataSource,UIPickerViewDelegate {
@IBOutlet weak var orginalValue: UITextField!
@IBOutlet weak var convertFrom: UIPickerView!
let pickerData = ["Celsius", "Fahrenheit"]
override func viewDidLoad() {
super.viewDidLoad()
convertFrom.dataSource = self
convertFrom.delegate = self
}
@IBOutlet weak var labelConvertFrom: UILabel!
@IBOutlet weak var convertTo: UIPickerView!
@IBOutlet weak var labelConverTo: UILabel!
@IBOutlet weak var answer: UILabel!
@IBAction func convertButton(sender: AnyObject) {
let a = Double(orginalValue.text!)
let tempConvertM = TempConvert(temp: a!)
answer.text = String(tempConvertM.convert())
}
func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return pickerData.count
}
func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return pickerData[row]
}
func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
labelConvertFrom.text = pickerData[row]
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
這裏是我得到的錯誤。 TempConverterModel.swift
import Foundation
extension ViewController{
class TempConvert{
var temp:Double
var view = ViewController()
init (temp:Double){
self.temp = temp
}
func convert()->Double{
if(view.labelConvertFrom.text == "Celsius"){ -->ERROR IS HIGHLIGHTED HERE <--
view.labelConverTo.text = "Fahrenheit"
return (temp-32)/1.8000; //fahrenheit formula
}
else{
view.labelConverTo.text = "Celsius"
return (temp*1.8000)+32; //celsius formula
}
}
}
}
我不知道我做錯了。我想檢查labelConvertFrom中的文本,並檢查它是否等於「攝氏度」。如果它沒有,然後返回答案。
我真的很感謝任何人的幫助。謝謝!
這工作。我按照你說的做了,並在convertButton中進行了比較。 非常感謝! –
如果這對你有用,你可以將它標記爲已回答:) –