SwiftyJSON & Swift 3: Cannot convert return expression of type 'Int32?' to return type > 'Int?'

Question

We are upgrading to SwiftyJSON Swift 3 with CocoaPods config pod 'SwiftyJSON', '3.1.0'.

We are getting this error:

/Users/xxx/Documents/iOS/xxx/Pods/SwiftyJSON/Source/SwiftyJSON.swift:866:33: Cannot convert return expression of type 'Int32?' to return type 'Int?'

Error is on the return statement in SwiftyJSON.swift:

public var int: Int? {
    get {
        return self.number?.int32Value
    }
    set {
        if let newValue = newValue {
            self.object = NSNumber(value: newValue)
        } else {
            self.object = NSNull()
        }
    }
}

Anyone know what the issue is? Is this an issue with our CocoaPods config or with SwiftyJSON?

Mend

Answer 1

Realized the supported version of SwiftyJSON is 3.0.0 and not 3.1.0. Used 3.0.0 and the issue went away.

pod 'SwiftyJSON', '3.0.0'

Mend

Did you run the pod update command and let it complete? And do a full clean and build? – Mend

Answer 2

I Just replace one line of code with below code. Simple

public var int: Int? {
        get {
            return self.number?.intValue
        }
        set {
            if let newValue = newValue {
                self.object = NSNumber(value: newValue)
            } else {
                self.object = NSNull()
            }
        }
    }

Conflagrant

It's valid but our objective is not to modify the client library source. – Mend

Yes. i agree with you. we should not modify it. But if we want temp solution to remove erro, we can use above code. In future, we will remove it definatly. – Conflagrant

Answer 3

simply try this,

Bad : return self.number?.int32Value

Good : return self.number?.intValue

Reason : Seems to be more generic in how it can return integers.

Waxy

Answer 4

I manually added as? Int to get this working again:

public var int: Int? {
    get {
        return self.number?.int32Value as? Int
    }
    set {
        if let newValue = newValue {
            self.object = NSNumber(value: newValue)
        } else {
            self.object = NSNull()
        }
    }
}

Sansom