Convert an array to json from swift

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Convert an array to json from swift

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#1 by (2 votes)
#2 by (0 votes)

2

I need to convert an array of strings that I get from an xml, into a json file and then save it in a sqlite database.

I have this code:

do {
   let jsonData = try NSJSONSerialization.dataWithJSONObject(dictionaryOrArray, options: NSJSONWritingOptions.PrettyPrinted)
} catch let error as NSError{
    print(error.description)
}

But I get this error:

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Invalid type in JSON write'

The array I believe in the parser xml:

func parser(parser: NSXMLParser, didEndElement elementName: String, namespaceURI: String?, qualifiedName qName: String?) {
    if elementName == "title" {
        let title: String = foundCharacters.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceAndNewlineCharacterSet())
        self.currentlyConstructingArticle.titulo = title
    }
    else if elementName == "img" {
        let imgString:String = foundCharacters.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceAndNewlineCharacterSet())
        self.currentlyConstructingArticle.imagen = imgString
    }
    else if elementName == "description" {
        let descripcion: String = foundCharacters.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceAndNewlineCharacterSet())
        self.currentlyConstructingArticle.descripcion = descripcion
    }
    else if elementName == "item" {
        self.articles.append(self.currentlyConstructingArticle)
    }

    self.foundCharacters = ""
}

json ios swift

asked by 12.08.2016 в 11:23

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2 answers

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score 2 · Answer 1

For swift 3:

Given an x array of strings

let stringArray = [ "string1", "string2" ]

You create the JSON from the array

let jsonData = try JSONSerialization.data(withJSONObject: stringArray, options: .prettyPrinted)

If you want to check, convert the JSON back to string

let string = String(data: jsonData, encoding: .utf8)

If you have a problem it's with the strings array you're trying

score 0 · Answer 2

0

let array = [ "one", "two" ]
let data = NSJSONSerialization.dataWithJSONObject(array, options: nil, error: nil)
let string = NSString(data: data!, encoding: NSUTF8StringEncoding)

answered by 23.08.2016 в 14:26