How to convert NSObject class object into JSON in Swift?

Question

I have

var  contacts : [ContactsModel] = []

and

class ContactsModel: NSObject
{
   var contactEmail : String?
   var cont         


        

Answer 1

Your custom object can't be converted to JSON directly. NSJSONSerialization Class Reference says:

An object that may be converted to JSON must have the following properties:

• The top level object is an NSArray or NSDictionary.

• All objects are instances of NSString, NSNumber, NSArray, NSDictionary, or NSNull.

• All dictionary keys are instances of NSString.

• Numbers are not NaN or infinity.

You might convert your object to a Dictionary manually or use some libraries like SwiftyJSON, JSONModel or Mantle.

Edit: Currently, with swift 4.0+, you can use Codable protocol to easily convert your objects to JSON. It's a native solution, no third party library needed. See Using JSON with Custom Types document from Apple.