I have data saved like this:
var mineSpillere = ["erik", "tom", "phil"]
How can i add that data to a UITableView by pressing a UIButton like this?:
#IBAction func backButtonAction(sender: AnyObject) {
// Press this button here to add the "mineSpillere" data to myTableView
}
Set the data source of the table view inside the IBAction. so like this:
#IBAction func backButtonAction(sender: AnyObject) {
myTableView.dataSource = self
// Loading from NSUserDefaults:
// Please name it something better than array I couldn't come up with any names.
if let array = NSUserDefaults.standardUserDefaults().arrayForKey("key") as? [String]
{
// The key exists in user defaults
}
else
{
// The key doesn't exist in the user defaults, do some error handling here.
}
}
And then implement the data source:
extension MyVC : UITableViewDataSource
{
func numberOfSectionsInTableView(tableView: UITableView) -> Int
{
return 1
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
return mineSpillere.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
let cell = UITableViewCell(style: .Default, reuseIdentifier: "cell")
cell.textLabel!.text = mineSpillere[indexPath.row]
return cell
}
}
Related
I'm a high school student working on an app in Xcode 8 using Swift 3. I am trying to create a way to create a table view with collapsible sections. I am trying to create a way to have my code create a view that pushes all of the data into organized sections. Im trying to have my data displayed through using an extension. Even when I have a breakpoint after the extension it never reaches that point.
Edit: The rest of the app is built within the Main.storyboard, however (as you can see), this tableViewController is built entirely within code.
I can create a segue to the WeaponSelectVC however, none of the information and sections are displayed. Breakpoints inside the datasource/delegate methods do not 'break' the program and no information is displayed.
Edit #2: From the storyboard, I segue to this TableViewController (WeaponSelectVC) using the following code after a button is pressed:
let window = UIWindow(frame:UIScreen.main.bounds)
window.makeKeyAndVisible()
window.rootViewController = UINavigationController(rootViewController: WeaponSelectVC())
I can see the table loaded for an instant before the Main.Storyboard ViewController (with the button) gets loaded on top of this.
The Table does not contain any of the information or sections when we see it for an instant (it also isn't loaded when I open this separately).
Below is the code from the WeaponSelect class:
struct section {
var name: String!
var items: [String]!
var collapsed: Bool
init(name: String, items: [String], collapsed: Bool = false) {
self.name = name
self.items = items
self.collapsed = collapsed
}
}
class WeaponSelectVC: UITableViewController {
var sections = [section]()
override func viewDidLoad() {
super.viewDidLoad()
self.title = "Weapons"
// Initialize the sections array
// Here we have three sections: Mac, iPad, iPhone
sections = [
section(name: "Canadian Weapons", items: ["Colt-browning machine gun M1895/14 (Canadian)","Lee Enfield (Canadian)", "Ross Rifle MK III(Canada)", "Webley revolver (Canadian)", "Lewis (Canadian)", "Mills bomb (Canadian)"]),
section(name: "German Weapons", items: ["KAR-98K (German)", "Mauser Gewehr 98 (German)", "Luger (German), Stick grenade (German)"]), ]
// self.tableView.reloadData()
self.tableView.dataSource = self
// self.tableView.delegate = self
// self.tableView.reloadData()
}
}
extension WeaponSelectVC {
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return sections.count
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return sections[section].items.count
}
// Cell
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell") as UITableViewCell? ?? UITableViewCell(style: .default, reuseIdentifier: "cell")
cell.textLabel?.text = sections[indexPath.section].items[indexPath.row]
return cell
}
func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
return sections[indexPath.section].collapsed ? 0 : 44.0
}
// Header
func tableView(tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
let header = tableView.dequeueReusableHeaderFooterView(withIdentifier: "header") as? CollapsibleTableViewHeader ?? CollapsibleTableViewHeader(reuseIdentifier: "header")
header.titleLabel.text = sections[section].name
header.arrowLabel.text = ">"
header.setCollapsed(sections[section].collapsed)
header.section = section
header.delegate = self
return header
}
func tableView(tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
return 44.0
}
func tableView(tableView: UITableView, heightForFooterInSection section: Int) -> CGFloat {
return 1.0
}
}
//
// MARK: - Section Header Delegate
//
extension WeaponSelectVC: CollapsibleTableViewHeaderDelegate {
func toggleSection(_ header: CollapsibleTableViewHeader, section: Int) {
let collapsed = !sections[section].collapsed
// Toggle collapse
sections[section].collapsed = collapsed
header.setCollapsed(collapsed)
// Adjust the height of the rows inside the section
tableView.beginUpdates()
for i in 0 ..< sections[section].items.count {
tableView.reloadRows(at: [IndexPath(row: i, section: section)], with: .automatic)
}
tableView.endUpdates()
}
}
From which class is the WeaponSelectVC inherited? Your extension should be inheriting from UITableView .
Your extension class should look like
extension UITableView {
I have an issue when I'm trying to pass the information from the database from Parse to my TableViewController. I think that is the way I'm calling to the name and password.
When I push the View Users button the app crash.
I put my git if you need more information. https://github.com/emmanuelcu/ParseProject.git
class TableViewController: UITableViewController{
var dataParse:NSMutableArray = NSMutableArray()
var count:Int = 0
override func viewDidLoad() {
super.viewDidLoad()
// Uncomment the following line to preserve selection between presentations
// self.clearsSelectionOnViewWillAppear = false
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem()
//PFQuery
let query = PFQuery(className: "LoginCredentials")
query.findObjectsInBackgroundWithBlock {
(objects: [PFObject]? , error: NSError?) -> Void in
if(error == nil){
print("The current number of users is \(objects!.count)")
self.count = objects!.count
self.tableView.reloadData()
} else {
print("Error")
}
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
//return self.dataParse.count
return self.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cellIdentifier = "CellData"
let cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier, forIndexPath: indexPath) as! TableViewCell
// Configure the cell...
cell.password.text = dataParse[indexPath.row]["name"] as? String
cell.name.text = dataParse[indexPath.row]["user"] as? String
print("Error")
return cell
}
When you run your query you never assign your objects to your data source, only the number of objects that you receive. Also you're force unwrapping that count without checking if objects has a count, which is possible even without an error.
It works like this dataParse array is empty you should populate it, or should disable view users button when it is empty etc.
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cellIdentifier = "CellData"
let cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier, forIndexPath: indexPath) as! TableViewCell
// Configure the cell...
if dataParse.count > indexPath.row {
cell.password.text = dataParse[indexPath.row]["name"] as? String
cell.name.text = dataParse[indexPath.row]["user"] as? String
}
print("Error")
return cell
}
I have followed a tutorial of Vea software (https://www.veasoftware.com/tutorials/2015/6/27/uisearchcontroller-in-swift-xcode-7-ios-9-tutorial) to create a table view with search bar on xcode 7, ios 9. Now I need to select multiple rows from the table view by adding a checkmark on each row when selected, the problem is that when I use the search bar the checkmarks don't match the rows anymore..
Here's my code:
class SportSearchTableViewController: UITableViewController, UISearchResultsUpdating {
let appleProducts = ["Mac","iPhone","Apple Watch","iPad"]
var filteredAppleProducts = [String]()
var resultSearchController = UISearchController()
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
tableView.deselectRowAtIndexPath(indexPath,animated: true)
let selectedRow = tableView.cellForRowAtIndexPath(indexPath)!
if selectedRow.accessoryType == UITableViewCellAccessoryType.None {
selectedRow.accessoryType = UITableViewCellAccessoryType.Checkmark
selectedRow.tintColor = UIColor.blueColor()
} else {
selectedRow.accessoryType = UITableViewCellAccessoryType.None
}
}
override func viewDidLoad() {
super.viewDidLoad()
self.resultSearchController = UISearchController(searchResultsController: nil)
self.resultSearchController.searchResultsUpdater = self
self.resultSearchController.dimsBackgroundDuringPresentation = false
self.resultSearchController.searchBar.sizeToFit()
self.tableView.tableHeaderView = self.resultSearchController.searchBar
self.tableView.reloadData()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if (self.resultSearchController.active)
{
return self.filteredAppleProducts.count
}
else
{
return self.appleProducts.count
}
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as UITableViewCell?
if (self.resultSearchController.active)
{
cell!.textLabel?.text = self.filteredAppleProducts[indexPath.row]
return cell!
}
else
{
cell!.textLabel?.text = self.appleProducts[indexPath.row]
return cell!
}
}
func updateSearchResultsForSearchController(searchController: UISearchController)
{
self.filteredAppleProducts.removeAll(keepCapacity: false)
let searchPredicate = NSPredicate(format: "SELF CONTAINS[c] %#", searchController.searchBar.text!)
let array = (self.sportsList as NSArray).filteredArrayUsingPredicate(searchPredicate)
self.filteredAppleProducts = array as! [String]
self.tableView.reloadData()
}
Does anyone know how to fix that?
I am trying have the user to modify/delete default text in a tableview, I have tried the following code witch works but as soon as the user goes to the other view controller and back (or leaves the app and comes back), the text goes back to being the default text.
How could I have it work?
I have posted the entire code for the tableView so you can have an overview of what I could have done wrong.
thank you !
var places = [Dictionary<String,String>()]
var activePlace = -1
class TableViewController: UITableViewController {
func companyNameUpdatedAlert(title: String, error: String, indexPath: Int) {
let alert = UIAlertController(title: title, message: error, preferredStyle: UIAlertControllerStyle.Alert)
alert.addTextFieldWithConfigurationHandler { (textField) -> Void in
textField.placeholder = "Enter new text"
}
alert.addAction(UIAlertAction(title: "OK", style: .Default, handler: { (action) -> Void in
let lat = places[indexPath]["lat"]!
let lon = places[indexPath]["lon"]!
places.removeAtIndex(indexPath)
places.insert(["name" : alert.textFields![0].text!, "lat" : lat, "lon" : lon], atIndex: indexPath)
self.tableView.reloadData()
}))
self.presentViewController(alert, animated: true, completion: nil)
}
override func tableView(tableView: UITableView, editActionsForRowAtIndexPath indexPath: NSIndexPath) -> [UITableViewRowAction]? {
let changeText = UITableViewRowAction(style: UITableViewRowActionStyle.Default, title: "Change text" , handler: { (action:UITableViewRowAction, indexPath:NSIndexPath) -> Void in
self.companyNameUpdatedAlert("Update text", error: "enter text below", indexPath: indexPath.row)
})
let deleteAction = UITableViewRowAction(style: UITableViewRowActionStyle.Default, title: "Delete" , handler: { (action:UITableViewRowAction, indexPath:NSIndexPath) -> Void in
places.removeAtIndex(indexPath.row)
tableView.reloadData()
})
return [changeText, deleteAction]
}
override func viewDidLoad() {
//save start
if NSUserDefaults.standardUserDefaults().objectForKey("places") != nil {
places = NSUserDefaults.standardUserDefaults().objectForKey("places") as! [Dictionary]
//save stop
super.viewDidLoad()
if places.count == 1 {
places.removeAtIndex(0)
places.append(["name":"Long press on map to add location","lat":"90","lon":"90"])
}
if NSUserDefaults.standardUserDefaults().objectForKey("places") != nil {
places = NSUserDefaults.standardUserDefaults().objectForKey("places") as! [Dictionary]
}
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return places.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as UITableViewCell
cell.textLabel?.text = places[indexPath.row]["name"]
return cell
}
override func tableView(tableView: UITableView, willSelectRowAtIndexPath indexPath: NSIndexPath) -> NSIndexPath? {
activePlace = indexPath.row
return indexPath
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "newPlace" {
activePlace = -1
}
}
override func viewWillAppear(animated: Bool) {
tableView.reloadData()
}
}
When you edit the table you should persist your data in the NSUserDefaults. Otherwise you are just changing the class property which is reloaded from the original NSUserDefaults each time the class loads.
Try this inside your UIAlertAction closure:
NSUserDefaults.standardUserDefaults().setObject(places, forKey: "places")
NSUserDefaults.standardUserDefaults().synchronize()
I'm using the latest beta of Xcode 7. I'm programming a simple UITableView, but this doesn't work well, the inspector error doesn't show anithing but when I start the simulator, the App crash. Can someone help me?
// RestaurantTableViewController.swift
import UIKit
class RestaurantTableViewController: UITableViewController {
var restaurantNames = ["Cafe Deadend", "Homei", "Teakha", "Cafe Loisl", "Petite Oyster", "For Kee Restaurant", "Po's Atelier", "Bourke Street Bakery", "Haigh's Chocolate", "Palomino Espresso","Upstate","Traif","Graham Avenue Meats","Waffle & Wolf", "Five Leaves", "Cafe Lore", "Confessional", "Barrafina", "Donostia", "Rpyal Oak", "Thai Cafe"]
var restaurantImages = ["cafedeadend.jpg", "homei.jpg", "teakha.jpg", "cafeloisl.jpg",
"petiteoyster.jpg", "forkeerestaurant.jpg", "posatelier.jpg", "bourkestreetbakery.jpg",
"haighschocolate.jpg", "palominoespresso.jpg", "upstate.jpg", "traif.jpg",
"grahamavenuemeats.jpg", "wafflewolf.jpg", "fiveleaves.jpg", "cafelore.jpg",
"confessional.jpg", "barrafina.jpg", "donostia.jpg", "royaloak.jpg", "thaicafe.jpg"]
override func viewDidLoad() {
super.viewDidLoad()
// Uncomment the following line to preserve selection between presentations
// self.clearsSelectionOnViewWillAppear = false
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
return self.restaurantNames.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("reuseIdentifier", forIndexPath: indexPath)
// Configure the cell...
cell.textLabel!.text = restaurantNames[indexPath.row]
cell.imageView?.image = UIImage(named: restaurantImages[indexPath.row])
return cell
}
}