I'm a noob, bear with me:
func createEmployeeCode() -> String? {
let email = UserDefaults.standard.object(forKey: "email_Saved") as? String
let employeeCode = UserDefaults.standard.object(forKey: "employeeCode_Saved") as? String
if let emailString = email,
let employeeCodeString = employeeCode {
return (emailString+employeeCodeString)
}
return (emailString+employeeCodeString) //ERROR: Use of unresolved identifier 'employeeCodeString' & Use of unresolved identifier 'emailString'
}
I understand the reason the error shows is because I'm trying to return something that is in a different scope here, but how else can I get the function to return the 2 strings together without the "Optional[...]" tag?
(Sidenote: use UserDefaults.standard.string(forKey:).)
The issue is that you can't know if those strings DO both exist or not--if they do, you already have a great if let that returns your answer. The question now is what do you want to do if one or both are nil? Maybe you'd like to return nil from the entire function. If so,
func createEmployeeCode() -> String? {
let email = UserDefaults.standard.string(forKey: "email_Saved")
let employeeCode = UserDefaults.standard.string(forKey: "employeeCode_Saved")
if let emailString = email,
let employeeCodeString = employeeCode {
return (emailString+employeeCodeString) //successful unwrapping, let's concatenate!
}
return nil //if one or both `if let`s fail, we end up here
}
Of course, you could do whatever you'd like in that "bad" case. Maybe you'd like to show whatever string you DO have. In that case:
func createEmployeeCode() -> String {
let email = UserDefaults.standard.string(forKey: "email_Saved")
let employeeCode = UserDefaults.standard.string(forKey: "employeeCode_Saved")
return (email ?? "") + (employeeCode ?? "") //this works in the "good" case, too, and uses the nil coalescing operator `??`
}
In this case, you can see that the return value is no longer optional. This is because even if neither string exists, it'll concatenate two empty strings. If this feels icky, you could keep your optional return value and do a quick check before returning:
if email == nil && employeeCode == nil { return nil }
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