Swift Haneke: Json Data in TextView

Question

I used the Haneke Framework to get Data from a Site. With the Haneke Framework i also can get Images from a site, and these Images i can present on a UIImageView. Now i wanted to get some text from a site.

I did it like this:

 cache.fetch(URL: URL).onSuccess { JSON in
            println(JSON.dictionary?["index"])

It printed me all the data from "Index".

Now i want, that all the data from "Index" should be presented on a UITextView.

  self.textView.text = JSON.dictionary["index"]

But it doesn't work. I get the error:

Cannot assign a value of type 'AnyObject' to a value of type 'String!'

I have to unwrap it or?

Answer 1

Finally, this prints out all records of the JSON text. The structure is an array of dictionaries. The text is very simply formatted (two tab characters between key and value).

  cache.fetch(URL: url).onSuccess { JSON in
    if let index = JSON.dictionary?["index"] as? [Dictionary<String,String>] {
      var resultString = ""
      for anItem in index {
        for (key, value) in anItem {
          resultString += "\(key)\t\t\(value)\n"
        }
        resultString += "\n\n"
      }
      self.textView.text = resultString
    }
  }
}

Answer 2

the compiler doesn't know the type of the dictionary item. If you know it's always a String make a forced downcast from AnyObject to String

self.textView.text = JSON.dictionary["index"] as! String

Answer 3

as we've revealed that JSON.dictionary["index"] is an Array, this is a safe syntax assuming that the array contains only one item

if let indexTextArray = JSON.dictionary?["index"] as? [String] {
  if !indexTextArray.isEmpty {
      self.textView.text = indexTextArray.first!
  }
}