How to fill data in UITableView? fast
I was able to get data from JSON using swiftJSON, but I ran into problems when I try to populate the table. I am new to iOS development, so please bear with me. I would appreciate it if you could help or give 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()
}
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3 answers
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 a working sample for you with a custom cell.
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Here is a code snippet.
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()
}
This is where I take the name. If you want to display the id as well, then create a model class for it.
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First, declare a local NSArray variable called contactArray.
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
}
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