how to populate data in UITableView ? swift - ios

Question

I have managed to retrieve data from JSON using swiftJSON but I am facing problems when i try to populate tableview. I am new to iOS development, so please bear with me on this. I would appreciate if you could help or provide some ideas ?
Here's the code:
override func viewDidLoad(){
super.viewDidLoad()
getContactListJSON()
}
func getContactListJSON(){
let urlString = "http://jsonplaceholder.typicode.com/users"
let urlEncodedString = urlString.stringByAddingPercentEscapesUsingEncoding(NSUTF8StringEncoding)
let url = NSURL( string: urlEncodedString!)
var task = NSURLSession.sharedSession().dataTaskWithURL(url!) {(data, response, innerError) in
let json = JSON(data: data)
let contactsArray = json.arrayValue
dispatch_async(dispatch_get_main_queue(), {
for contacts in contactsArray
{
let id = contacts["id"].stringValue
let name = contacts["name"].stringValue
println( "id: \(id) name: \(name)" )
}
})
}
task.resume()
}

Answer 1

Here is your complete code for that:
import UIKit
class TableViewController: UITableViewController {
var tableName = [String]()
var tableID = [String]()
override func viewDidLoad() {
super.viewDidLoad()
getContactListJSON()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func getContactListJSON(){
let urlString = "http://jsonplaceholder.typicode.com/users"
let urlEncodedString = urlString.stringByAddingPercentEscapesUsingEncoding(NSUTF8StringEncoding)
let url = NSURL( string: urlEncodedString!)
var task = NSURLSession.sharedSession().dataTaskWithURL(url!) {(data, response, innerError) in
let json = JSON(data: data)
let contactsArray = json.arrayValue
dispatch_async(dispatch_get_main_queue(), {
for contacts in contactsArray
{
let id = contacts["id"].stringValue
let name = contacts["name"].stringValue
println( "id: \(id) name: \(name)" )
self.tableName.append(name)
self.tableID.append(id)
}
dispatch_async(dispatch_get_main_queue(),{
self.tableView.reloadData()
})
})
}
task.resume()
}
// MARK: - Table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return tableName.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as! TableViewCell
// Configure the cell...
cell.id.text = tableID[indexPath.row]
cell.name.text = tableName[indexPath.row]
return cell
}
}
And HERE is working sample project for you with custom cell.

Answer 2

First declare a local variable NSArray called contactsArray.
override func viewDidLoad(){
super.viewDidLoad()
getContactListJSON()
}
//Code for downloading data
func getContactListJSON(){
let urlString = "http://jsonplaceholder.typicode.com/users"
let urlEncodedString = urlString.stringByAddingPercentEscapesUsingEncoding(NSUTF8StringEncoding)
let url = NSURL( string: urlEncodedString!)
var task = NSURLSession.sharedSession().dataTaskWithURL(url!) {(data, response, innerError) in
let json = JSON(data: data)
self.contactsArray = json.arrayValue
dispatch_async(dispatch_get_main_queue(), {
[self.tableView reloadData]
})
}
task.resume()
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return self.contactsArray.count;
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
var cell:UITableViewCell = self.tableView.dequeueReusableCellWithIdentifier("cell") as UITableViewCell
var contacts:NSDictionary = self.contactsArray[indexPath.row];
cell.textLabel?.text = contacts["name"].stringValue
//.......
//.......
return cell
}

Answer 3

Here is a piece of code.
var dataArray = [String]()
override func viewDidLoad(){
super.viewDidLoad()
getContactListJSON()
}
func getContactListJSON(){
let urlString = "http://jsonplaceholder.typicode.com/users"
let urlEncodedString = urlString.stringByAddingPercentEscapesUsingEncoding(NSUTF8StringEncoding)
let url = NSURL( string: urlEncodedString!)
var task = NSURLSession.sharedSession().dataTaskWithURL(url!) {(data, response, innerError) in
let json = JSON(data: data)
let contactsArray = json.arrayValue
dispatch_async(dispatch_get_main_queue(), {
for contacts in contactsArray
{
let id = contacts["id"].stringValue
let name = contacts["name"].stringValue
println( "id: \(id) name: \(name)" )
self.dataArray.append(name)
}
self.tableView.reloadData()
})
}
task.resume()
}
Here i am taking name. If you want to display id as well, then create a model class for it.