How to add an Array<String> to a Dictionary<String, AnyObject> in Swift 2

Question

RESOLVED! See the solution at the bottom of this post

I'm trying to create a JSON object to use for my backend using Alamofire. I am able to add a key with a String value but can't seem to be able to add a value of Array to AnyObject. I though it would be very straight forward but I haven't been able to find a solution.

func someFunction(btn: UIButton){

        var someDictionary = Dictionary<String, AnyObject>()
        let someArray = [textField[1].text,textField[2].text,textField[3].text]
        someDictionary["answer"] = textField[0].text
        someDictionary["options"] = someArray as? Array // <---- Can't be assigned to AnyObject

        let url = "http://localhost:3000/api/question"
        Alamofire.request(.POST, url, parameters: someDictionary).responseJSON { response in
            if let JSON = response.result.value as? Dictionary<String, AnyObject>{   
            }
        }

 }

Solution: Removed as? Array and created loop to append initialized Array

func someFunction(btn: UIButton){



        var someDictionary = Dictionary<String, AnyObject>()
        var SomeArray = [String]()
        for i in 1...3{                          //created loop to append the textField text
            SomeArray.append(textField[i].text!)
        }
        someDictionary["answer"] = textField[0].text
        someDictionary["options"] = SomeArray // Removed "as? Array"
        let url = "http://localhost:3000/api/question"
        Alamofire.request(.POST, url, parameters: someDictionary).responseJSON { response in
            if let JSON = response.result.value as? Dictionary<String, AnyObject>{
                print("JSON Response From Server-->\(JSON)")


            }
        }

    }

user3815344 · Accepted Answer · 2016-04-23 04:57:29Z

2

Clean your project and run again. Your code is working for me and I can assign

func someFunction(btn: UIButton){

    var someDictionary = Dictionary<String, AnyObject>()
    let someArray = ["SomeString","SomeString","SomeString"]
    someDictionary["answer"] = textFields[0].text
    someDictionary["options"] = someArray // now you can assign

    let url = "http://localhost:3000/api/question"
    Alamofire.request(.POST, url, parameters: someDictionary).responseJSON { response in
        if let JSON = response.result.value as? Dictionary<String, AnyObject>{
        }
    }

}

edited Apr 23, 2016 at 4:57

answered Apr 23, 2016 at 3:57

user3815344

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6 Comments

Jeff A Over a year ago

Thanks for the response. This solves the problem with the array but I also need to pass a String value into the Dictionary at the someDictionary["answer"] = textFields[0].text line. Is there a way to allow both Strings and Arrays into the Dictionary? EDIT: After testing your solution It seems the Alamofire request need the type Dictionary<String, AnyObject>

user3815344 Over a year ago

In that case I suggest you use NSMutableDictionary instead of using swift Dictionary.

user3815344 Over a year ago

@JeffA I changed my answer to use NSMutableDictionary instead of swift Dictionary. Have a look.

Jeff A Over a year ago

Unfortunately this is not working with the current Alamofire request as it is expecting a Dictionary<String, AnyObject>. It looks like I will need to create a custom Alamofire request to use NSMutableDictionary. I'm going to try and refactor the solution in this post to do so.

user3815344 Over a year ago

@JeffA just remove the as?. everything works fine. Do a good clean and run your code. No need of using NSMutableDictionary or customizing your frameworks.

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