How to generate JSON data from NSDictionary in Swift

Question

I'm new to Swift and I am trying to generate JSON data from an NSDictionary

Here's my code:

func metricsToJson() {
        if let data = NSJSONSerialization.dataWithJSONObject(metricsData, options: NSJSONWritingOptions.PrettyPrinted, error: &error) {
            if let json = NSString(data: data, encoding: NSUTF8StringEncoding) {
                println(json)
            }

        }
    }

I'm not sure why this isn't working, but any guidance would be greatly appreciated.

Some mighty impressive code you've got there. (Paste the code into your question, highlight it, then press the `{}` button above the editing window. Don't embed images of code, even if you manage to do it correctly.) — Hot Licks, Jul 27 '15 at 18:54
Sorry about that. I wanted to show the screenshot so you could see the error — Varun Varahabotla, Jul 27 '15 at 18:57

score 0 · Accepted Answer · answered Jul 28 '15 at 06:14

Try below code, it may help to solve your problem.

var jsonResult = NSJSONSerialization.JSONObjectWithData(metricsData, options: NSJSONReadingOptions.MutableContainers, error: nil) as! NSArray

for var i = 0; i<jsonResult.count; ++i {

    var dictResult = jsonResult.objectAtIndex(i) as! NSDictionary
    // your code...
}

How to generate JSON data from NSDictionary in Swift

1 Answers1