我正在创建一个温度转换器。当我运行应用程序时;输入温度,选择转换并点击转换。出现错误。 错误是:EXC_BAD_INSTRUCTION(代码= EXC_I386_INVOP,子码=为0x0)EXC_BAD_INSTRUCTION(code = EXC_I386_INVOP,subcode = 0x0)
这是我的代码视图控制器:
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.
}
}
这里是我得到的错误。 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
}
}
}
}
我不知道我做错了。我想检查labelConvertFrom中的文本,并检查它是否等于“摄氏度”。如果它没有,然后返回答案。
我真的很感谢任何人的帮助。谢谢!
这工作。我按照你说的做了,并在convertButton中进行了比较。 非常感谢! –
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