Index of JSON Array Swift

Question

I am using this library to parse an API endpoint that returns an array: https://github.com/SwiftyJSON/SwiftyJSON

I am grabbing an array fetched from a JSON response and I am trying to feed it into a table.

Right after my class in my view controller is declared, I have

var fetched_data:JSON = []

Inside of my viewDidLoad method:

let endpoint = NSURL(string: "http://example.com/api")
        let data = NSData(contentsOfURL: endpoint!)
        let json = JSON(data: data!)
        fetched_data = json["posts"].arrayValue

To feed the table, I have:

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

        let cell: UITableViewCell = self.tableView.dequeueReusableCellWithIdentifier("cell1")! as UITableViewCell
        cell.textLabel?.text = self.fetched_data[indexPath.row]
        return cell      
    }

I am getting this error, when trying to set the cell textLabel:

Cannot subscript a value of a type ‘JSON’ with an index type of ‘Int’

How do I do this properly and get this to work?

sunshinejr · Accepted Answer · 2015-12-02 22:42:06Z

2

You are declaring fetched_data as JSON

var fetched_data:JSON = []

but you are assigning Array to it:

fetched_data = json["posts"].arrayValue

Lets change the type to array of AnyObject:

var fetched_data: Array<AnyObject> = []

and then assigning should be like this (we have [AnyObject] so we need to cast):

if let text = self.fetched_data[indexPath.row] as? String {
    cell.textLabel?.text = text
}

Edit: You also need to remember to assign correct Array, by doing arrayObject instead of arrayValue:

fetched_data = json["posts"].arrayObject

edited Dec 2, 2015 at 22:42

answered Dec 2, 2015 at 22:18

sunshinejr

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2 Comments

Katie H Over a year ago

Thank you! Now, in my vieDidLoad method, I am getting: Cannot assign value of type ‘[JSON]’ to type ‘Array<String>’

Katie H Over a year ago

Thank you sooooo much, I really appreciate it!

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