CODEWITHSUNDEEP
iosswift
Alex Bean
Alex Bean

Reputation: 553

Swift - Assign newValue to an Object

I know that probably is a very simple question, however I spent a lot of time trying to figure out why is not working, and still doesn't make sense for me, so I need help.

I am learning iOS, I came from Android where I am used to work with objects. I want to do something similar that I have been doing with Android(maybe this is the problem).

I have created an object with the methods get and set.

private var _token: String!

var error: String {
    get {
        guard self._error != nil else { return "" }
        return _error
    }
    set {
        self._token = newValue
    }
}

When I want to manipulate this object, is when I am having the problem.

let objectCreated = ObjectCreated()
guard let errorReceived = (xml["Whatever"]["Whatever"].element?.text) else { return }

print(errorReceived)
objectCreated.error = errorReceived
print(objectCreated.error)

The first print is printing the correct String, but the second is printing "". So the set method is not doing his job.

Upvotes: 0

Views: 226

Answers (2)

vadian
vadian

Reputation: 285092

Isn't it supposed to be 

...
guard self._token != nil else { return "" }
    return _token
...

This can be simplified with the nil-coalescing operator

var error: String {
    get {
        return self._token ?? ""
    }
    set {
        self._token = newValue
    }
}

Note: Variable names with leading underscores are unusual in Swift.

Upvotes: 2

Vyacheslav
Vyacheslav

Reputation: 27211

private var _error: String!

var error: String {
    get {
        guard self._error != nil else { return "" }
        return _error
    }
    set {
        self._error = newValue
    }
}

self._token = newValue >>>> self._error = newValue

Upvotes: 1

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