Swift - Get an array of strings from JSON using SwiftyJSON

Question

[
  {
    "content": "Hello!",
    "images": [
      {
        "url": "http://url1.com"
      },
      {
        "url": "http://url2.com"
      },
      {
        "url": "http://url3.com"
      }
    ]
  }
]

How can I get an array of image urls using SwiftyJSON?

This is what I tried and did not work.

for (key, subJson) in json["images"] {
 if let url = subJson["url"].string {
    print(url)
}
}

If I understand correctly, my "images" JSON contains an array of dictionaries but my code is for an array of strings. What can i do to get an array of url strings?

vadian · Accepted Answer · 2016-10-30 16:46:19Z

4

According to your JSON

if let images = json[0]["images"].array {
  for image in images {
    if let url = image["url"].string {
      print(url)
    }
  }
}

The root object is an array [], the dictionary ({}) containing images is in the first object of the root array.

You can get an array of the URLs with

if let images = json[0]["images"].array {
  let imageArray = images.flatMap{ $0["url"].string }
  print(imageArray)
}

edited Oct 30, 2016 at 16:46

answered Oct 30, 2016 at 16:34

vadian

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6 Comments

imstillalive Over a year ago

Thanks! What if I also want a string of url? How can I do that?

vadian Over a year ago

I don't understand, the value of url is String.

imstillalive Over a year ago

When I do this let imageString = images.flatMap{ $0["url"].string } I get a 'flatmap produces ... not the expected contextual result of type String!" Sorry. I'm very new to swift.

vadian Over a year ago

You wrote: get an array of url strings. This is an array of strings ([String]), not a single string (String).

imstillalive Over a year ago

I understand. Your answer worked perfectly and I already used it. But now I have another JSON that I need to parse. It requires me to get it out as a single String not a [String]. I do not know how to do this and I thought you might so thats why I commented to ask.

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