Home/ Questions/Q 1449
Answered
Gary Christan
Asked: 2022-02-22T13:17:05+00:00

How can I test if an integerForKey is equal to nil? Using NSUserDefaults

So far, I have a function that tries to see if someone already has a code, and if they do not already have one, then it would generate one for them. func checkID() -> Int{

    if (NSUserDefaults.standardUserDefaults().integerForKey("Code") != nil) {

    }
    else{
        var code = Int(arc4random_uniform(1000000000))
        NSUserDefaults.standardUserDefaults().setInteger(code, forKey: "Code")
    }
    return NSUserDefaults.standardUserDefaults().integerForKey("Code")
}

I get an error message when I try to to say NSUserDefaults.standardUserDefaults().integerForKey(“Code”) != nil

The error message I get is “Type ‘Int’ does not conform to protocol ‘NilLiteralConvertible'”

What can I do to try to get around this? What am I doing wrong?

integerforkeynsuserdefaults
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1 Answer

  1. Best Answer

    The integerForKey always returns a value. If nothing’s there, just 0.

    So you should check like that:

    if let currentValue = NSUserDefaults.standardUserDefaults().objectForKey("Code"){
    //Exists
}else{
    //Doesn't exist
}
    • 0

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