Load table with titles from JSON - arrays

Question

I have a page with a TableView that fills each cell with a hardcoded UILabel of some text. I would like it to fill up with UILabels from a JSON that I get online.
Storyboard:
The code:
import UIKit
class ViewController: UIViewController {
#IBOutlet weak var tableView: UITableView!
var objects: NSMutableArray! = NSMutableArray()
override func viewDidLoad(){
super.viewDidLoad()
self.objects.add("iPhone")
self.objects.add("Apple Watch")
self.objects.add("Mac")
self.objects.add("Test")
self.tableView.reloadData()
}
override func didReceiveMemoryWarning(){
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func numberOfSectionsInTableView(_ tableView: UITableView) -> Int{
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int{
return self.objects.count
}
func tableView(_ tableView: UITableView, cellForRowAtIndexPath indexPath: IndexPath) -> UITableViewCell{
let cell = self.tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! TableViewCell
cell.titleLabel.text = self.objects.object(at: (indexPath as NSIndexPath).row) as? String
//cell.logButton.tag = (indexPath as NSIndexPath).row;
//cell.logButton.addTarget(self, action: #selector(ViewController.logAction(_:)), for: .touchUpInside)
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAtIndexPath indexPath: IndexPath){
self.performSegue(withIdentifier: "showView", sender: self)
}
#IBAction func logAction(_ sender: UIButton) {
let titleString = self.objects[sender.tag] as? String
let firstActivityItem = "\(titleString!)"
let activityViewController : UIActivityViewController = UIActivityViewController(activityItems: [firstActivityItem], applicationActivities: nil)
self.present(activityViewController, animated: true, completion: nil)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?){
if (segue.identifier == "showView"){
let upcoming: NewViewController = segue.destination as! NewViewController
let indexPath = self.tableView.indexPathForSelectedRow!
let titleString = self.objects.object(at: indexPath.row) as? String
upcoming.titleString = titleString
self.tableView.deselectRow(at: indexPath, animated: true)
}
}
}
Once in simulator and I open up the page, the TableView will have four cells with the "Label" changing to whatever was adding to the objects array, which in this case is iPhone, Apple Watch, Mac, and Test. Rather than having those hardcoded, I would like to have the items loaded from a JSON file.
I have the same thing done with a PickerView, but I am struggling to figure out how to do it with this. Here is how it was done with my PickerView if it helps:
Alamofire.request("example.com/file.json").responseJSON{ response in
if let JSON = response.result.value as? [String:AnyObject] {
self.mypickerview.delegate = self
self.mypickerview.dataSource = self
let result = JSON.values.flatMap({ String(describing: $0) })
self.pickerData.append(contentsOf: result)
self.pickerData.sort()
self.verbose.text = "Content saved!"
self.mypickerview.reloadAllComponents()
self.mypickerview.delegate = self;
self.verbose.text = "Finished Loading!"
}
}
The JSON file:
{"One":"Mac","Two":"Apple iPhone","Three":"Test"}

Answer 1

1.On viewDidLoad fire the webService.
2.On Webservice completion handler ,retreive the label values and assign to objects.
3.Reload tableview.

Answer 2

your JSON should look like this:
{
"titles": [
"mac",
"iphone",
"test"
]
}
and you will do something like cell.titleLabel.text = [[yourJSON valueForKey:#"titles"] objectAtIndex:indexPath.row];
(this is Obj-C version, but ofc it can be done also in swift)