error - EXC_BREAKPOINT (code=1, subcode=0x100308448)
每次我试图双击divide按钮时,Xcode都会发出EXC_断点(code=1,subcode=0x100308448),我的应用程序就会崩溃。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
}
}
最佳答案
可惜$0
只能Int
,不能Double
。
您应该像下面这样详细描述内嵌函数。
operateWithTwoOperands {first, second in return first / second;}
谢谢你的阅读。
关于ios - 错误-EXC_BREAKPOINT(代码= 1,子代码= 0x100308448),我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/45413088/