How to check if JSON is null in swift?

Question

I am currently working on an app which brings back json, in the following format

\"location_subtype\" = \"somevalue\"; \"location_type\" = Force;

Answer 1

Try corresponding Swift class to following Objective C class,

dict["outcome_status"] != [NSNull null]

Answer 2

Try something like this:

Swift code:

if let outcome = dict["outcome_status"] as? NSDictionary {
    //Now you know that you received a dictionary(another json doc) and is not 'nil'
    //'outcome' is only valid inside this if statement

    if let category = outcome["category"] as? String {
        //Here you received string 'category'
        outcomeStatusLabel.text = category
        outcomeStatusLabel.font = UIFont.systemFontOfSize(14.0)
        outcomeStatusLabel.numberOfLines = 0
    }

    if let date = outcome["date"] as? String {
        //Here you received string 'date'
        outcomeDateLabel.text = date
        outcomeDateLabel.font = UIFont.systemFontOfSize(14.0)
        outcomeDateLabel.numberOfLines = 0
    }
}

This is a safe way to work with Json.

Answer 3

in case you are using Alamofire and JSONSubscriptType use this:

if !(parsedJSON["someKey"] == JSON.null) {
//do your stuff 
}

Answer 4

If you're using SwiftyJSON, just check .isEmpty() on the object to confirm if it's empty.

Answer 5

if ((nullObject as? NSNull) == nil)  {
        ...
       }