I produced a basic functional calculator with this app in Xcode 26; but it is very simple and had some common issues in the original prototype (draft). I'm not certain if the original developer introduced this issue intentionally; but, If I were the original developer then I would have at least added a comment that lets the audience know that the calculate function renders a "Calculator/ViewController.swift:75: Fatal error: Unexpectedly found nil while unwrapping an Optional value"
func calculate() -> Double{
let previousNumber = Double(previousNumberText)! _<- o "Fatal error: Unexpectedly found nil while unwrapping an Optional value"_
let currentNumber = Double(currentNumberText)!
previousNumberText = ""
currentNumberText = ""
This is a common problem in Xcode development and can be utilized by new developers and students to hone their developer skills and begin researching developer issues; but, I really think that the author should have indicated that this would create an error that prevents the calculator from performing the basic operations; and that users will have to develop their own solutions to resolve these issues.
Also the presentation of this project does not correctly provide a "clearAll" function, e.g., func clearAll or a NaN operation when a user attempts to divide by "0."
This is still a valuable exercise and introduction to Xcode development procedures in Swift Storybook (but I generally prefer the Objective-C/Swift without Storybook DUI); the issues just seem short sided and should at least inform the audiences that they will encounter issues and need to research/handle these issues to produce a calculator that is fully functional.
I produced a basic functional calculator with this app in Xcode 26; but it is very simple and had some common issues in the original prototype (draft). I'm not certain if the original developer introduced this issue intentionally; but, If I were the original developer then I would have at least added a comment that lets the audience know that the calculate function renders a "Calculator/ViewController.swift:75: Fatal error: Unexpectedly found nil while unwrapping an Optional value"
This is a common problem in Xcode development and can be utilized by new developers and students to hone their developer skills and begin researching developer issues; but, I really think that the author should have indicated that this would create an error that prevents the calculator from performing the basic operations; and that users will have to develop their own solutions to resolve these issues.
Also the presentation of this project does not correctly provide a "clearAll" function, e.g., func clearAll or a NaN operation when a user attempts to divide by "0."
This is still a valuable exercise and introduction to Xcode development procedures in Swift Storybook (but I generally prefer the Objective-C/Swift without Storybook DUI); the issues just seem short sided and should at least inform the audiences that they will encounter issues and need to research/handle these issues to produce a calculator that is fully functional.