Generating JSON on iOS using Swift

Of course, you can invoke the NSJSONSerialization.dataWithJSONObject method from Swift, too, which returns an NSData object that you can then convert to a string.

How to do it…

Here's a simple example:

var error: NSError?
var data: NSJSONSerialization.dataWithJSONObject(
  dictionary, 
  options: NSJSONWritingOptions(0),
  error: &error);
var json: NSString(data: data, encoding: NSUTF8StringEncoding); 

How it works…

The method dataWithJSONObject operates just as its Objective-C counterpart does. Once we receive NSData containing the JSON-encoded version of the dictionary, we convert it to NSString using the NSString constructor.