错误 - EXC_BREAKPOINT（代码=1，子代码=0x100308448）

Posted 2023-03-14

【中文标题】错误 - EXC_BREAKPOINT（代码=1，子代码=0x100308448）

【英文标题】：Error - EXC_BREAKPOINT (code=1, subcode=0x100308448)

【发布时间】：2017-07-31 10:14:27

【问题描述】：

error - EXC_BREAKPOINT (code=1, subcode=0x100308448)

每次我尝试双击分割按钮时，Xcode 都会发出 EXC_BREAKPOINT（代码 = 1，子代码 = 0x100308448），并且我的应用程序崩溃。你能帮我解决这个问题吗？

Dividing button - EXC_BREAKPOINT(...)

import UIKit

class ViewController: UIViewController 

    @IBOutlet weak var displayResultLabel: UILabel!
    var stillTyping = false
    var dotIsPlaced = false
    var firstOperand: Double = 0
    var secondOperand: Double = 0
    var operationSign: String = ""


    var currentInput: Double 
        get 
            return Double (displayResultLabel.text!)!
        
        set 
            let value = "\(newValue)"
            let ValueArray = (value.components(separatedBy:"."))
            if ValueArray[1] == "0" 
                displayResultLabel.text = "\(ValueArray[0])"
             else 
                displayResultLabel.text = "\(newValue)"
            
            stillTyping = false
        
    

    @IBAction func numberPressed(_ sender: UIButton) 
        let number = sender.currentTitle!

        if stillTyping 
            if (displayResultLabel.text?.characters.count)! < 20 
                displayResultLabel.text = displayResultLabel.text! + number
            
         else 
            displayResultLabel.text = number
            stillTyping = true
        
    

    @IBAction func twoOperandsSignPressed(sender: UIButton) 
        operationSign = sender.currentTitle!
        firstOperand = currentInput
        stillTyping = false
        dotIsPlaced = false
    

    func operateWithTwoOperands(operation: (Double, Double) -> Double) 
        currentInput = operation(firstOperand, secondOperand)
        stillTyping = false
    

    @IBAction func equalitySignPressed(sender: UIButton) 

        if stillTyping 
            secondOperand = currentInput
        

        dotIsPlaced = false

        switch operationSign 

        case "+":
            operateWithTwoOperands$0 + $1

        case "-":
            operateWithTwoOperands$0 - $1

        case "✕":
            operateWithTwoOperands$0 * $1

        case "÷":
            operateWithTwoOperands$0 / $1
        default: break

        
    

    @IBAction func clearButtonPressed(_ sender: UIButton) 
        firstOperand = 0
        secondOperand = 0
        currentInput = 0
        displayResultLabel.text = "0"
        dotIsPlaced = false
        operationSign = ""

    

    // +,-
    @IBAction func plusMinusButtonPressed(_ sender: UIButton) 
        currentInput = -currentInput
    

    @IBAction func percentageButtonPressed(_ sender: UIButton) 
        if firstOperand == 0 
            currentInput = currentInput / 100
         else 
            secondOperand = firstOperand * currentInput / 100
        
    

    @IBAction func squareRootButtonPressed(_ sender: UIButton) 
        currentInput = sqrt(currentInput)
    

    @IBAction func dotButtonPressed(_ sender: UIButton) 
        if stillTyping && !dotIsPlaced 
            displayResultLabel.text = displayResultLabel.text! + "."
            dotIsPlaced = true
         else if !stillTyping && !dotIsPlaced 
            displayResultLabel.text = "0."
        

    override var preferredStatusBarStyle: UIStatusBarStyle 
        return .lightContent
    

【问题讨论】：

当您可以将错误消息复制粘贴到引用块中时，请不要使用图像。另外，缩进你的代码。

除法运算发生代码崩溃时的第一个想法应该是：确保你永远不会被零除。

【参考方案1】：

可惜$0 只能是Int，而不是Double。 您应该像下面这样详细描述内联函数。

operateWithTwoOperands first, second in return first / second;

感谢您的阅读。