I'm using the Beginning Swift Programming book by AppCoda and I can't seem to figure out what is wrong with this block of code.
import UIKit
class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
var restaurantNames = ["Cafe Deadend", "Homei", "Teakha", "CafeLoisl", "Petite Oyster", "For Kee Restaurant", "Po's Atelier", "Bourke Street Bakery", "Haigh’s Chocolate", "Palomino Espresso", "Upstate", "Traif", "Graham Avenue Meats And Deli", "Waffle & Wolf", "Five Leaves", "Cafe Lore", "Confessional", "Barrafina", "Donostia", "Royal Oak", "CASK Pub and Kitchen"]
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// Return the number of rows in the section.
return restaurantNames.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) ->
UITableViewCell {
let cellIdentifier = "Cell"
let cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier, forIndexPath: indexPath) as UITableViewCell
// Configure the cell...
cell.textLabel.text = restaurantNames[indexPath.row]
return cell
}
}
This line is throw a 'AnyObject is not convertible to 'UITableViewCell'
let cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier, forIndexPath: indexPath) as UITableViewCell
I'm really new to Swift and iOS programming in general so any help would be appreciated.
You need to change as to as!
var cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as! UITableViewCell
Also make sure that you have added a prototype cell to your storyboard with the reusable string name "Cell"
//MARK: Tableview
func tableView(tableView: UITableView!, numberOfRowsInSection section: Int) -> Int
{
return tabledata.count
}
func tableView(tableView: UITableView!,
cellForRowAtIndexPath indexPath: NSIndexPath!) -> UITableViewCell!
{
let cell:UITableViewCell = UITableViewCell(style:UITableViewCellStyle.Default, reuseIdentifier:"Cell")
cell.textLabel?.text = tabledata[indexPath.row]
return cell
}
I have used this code for tableview....You can change this according to your need.Even I'm new in swift or else I would've correct your code.
Related
I am trying to make my tableview cell from viewcontroller 1 change when the user click on a cell from tableview cell from viewcontroller 2. I know that I have to work with the function
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
however, I am not sure how I would accomplish what I wanted.
Here's my code:
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let indexPath = changeHotelTableView.indexPathForSelectedRow;
let currentCell = changeHotelTableView.cellForRow(at: indexPath!) as! ChangeHotelTableViewCell
var valueToPass = currentCell.textLabel?.text
}
I want to get the valueToPass variable into my cell at another' view controller; say this is called timeViewController with timeTableView and a timeTableViewCell. How will I do this?
Thanks for your help and time in advance
Perhaps you should try with Protocol.
ViewController2:
protocol UserPressTheCell: NSObjectProtocol
{
func didUserPressTheCellWith(indexPath: IndexPath, text: String)
}
class ViewController2: UIViewController
{
//declare delegate
weak var delegate: UserPressTheCell?
....
func tableview(_ tableview: UITableView, didSelectRowAt indexPath: IndexPath)
{
let indexPath = changeHotelTableView.indexPathForSelectedRow;
let currentCell = changeHotelTableView.cellForRow(at: indexPath!) as! ChangeHotelTableViewCell
self.delegate?.didUserPressTheCellWith(indexPath: indexPath, text: currentCell.textLabel?.text)
}
}
Then implement in ViewController1:
class ViewController1: UIViewController, UserPressTheCell
{
#IBOutlet weak var tableview: UITableView!
...
//MARK: UserPressTheCell
func didUserPressTheCellWith(indexPath: IndexPath, text: String)
{
let cell = self.tableView.cellForRow(at: indexPath!) as! "Your VC1's cell"
cell.textLabel?.text = text
}
}
To be sure delegate will not be nil:
override func prepare(for segue: UIStoryboardSegue, sender: Any?)
{
let vc2 = segue.destination as! ViewController2
vc2.delegate = self
}
or wherever you segue to ViewController2.
Maybe this is the best way to accomplish what you wanted.
I am trying to implement an alarm clock app just like apple's Clock app.On the click of Edit button on the left hand side I want to make table enter into Editing mode with red circles on left side of every cell(custom UITableViewCell) And on the click of that red circle want to show "Delete" button/action on the right side.
I have been trying a lot and went through many sites but still could not figure out. Can someone please see what mistake I am making?
I have referred below and many others links:
How to enable swipe to delete cell in a TableView?
UITableViewCell, show delete button on swipe
class SavedAlarmListViewController: UIViewController,UITableViewDataSource,UITableViewDelegate{
#IBOutlet weak var tableView: UITableView!
var alarms = [AlarmDataObject]()
override func viewDidLoad() {
super.viewDidLoad()
self.tableView.delegate = self
self.tableView.dataSource = self
self.navigationItem.leftBarButtonItem = self.editButtonItem()
}
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(true)
refreshList()
}
func refreshList() {
alarms = AlarmsList.sharedInstance.allSavedAlarms()
tableView.reloadData()
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return alarms.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cellIdentifier = "cell"
let cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier, forIndexPath: indexPath) as! AlarmTableViewCell
// custom code to set data ....
return cell
}
func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {
return true // all cells are editable
}
func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if editingStyle == .Delete {
let alarm = alarms.removeAtIndex(indexPath.row)
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
AlarmsList.sharedInstance.removeAnAlarm(alarm)
}
}
}
class AlarmTableViewCell:UITableViewCell {
// IBOutlets
override func awakeFromNib() {
super.awakeFromNib()
}
override func setSelected(selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
}
}
You should implement
tableView(_:editingStyleForRowAtIndexPath:) and return .Delete
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
}
}
I would like to set the values of detail labels in the View Controller file using an array with index path.row .
In a previous post:
[link][1]
someone helpfully suggested I use
var nib = UINib(nibName: "YourCellSubclass", bundle: nil)
tableView.registerNib(nib, forCellReuseIdentifier: "cell")
however I'm new to using this and came across an error:
Cannot invoke registerNib with an argument list of type 'UINib, forCellReuseIdentifier: 'String'
My best guess would be, instead of this:
var cell:UITableViewCell = self.tableView.dequeueReusableCellWithIdentifier("cell") as UITableViewCell
Should be:
var cell: YourSubClass = self.tableView.dequeueReusableCellWithIdentifier("cell") as YourSubClass
This compiles in Xcode 7:
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! MyCellSubclass
return cell
}
If you have multiple kinds of cells, you can go with:
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let aCell = table.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath)
if let myCell = aCell as? MyCellSubclass {
return myCell
}
return aCell
}
In xcode 6 while deleting cell in my to do list i randomly get an error
"exc_bad_access code=exc_i386_gpflt"
i have got a two views - on second i enter items in array "toDoList"
In first i show all item from "toDoList" and have an option to delete when, code of first page in this:
import UIKit
var toDoList: [String] = []
class FirstViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
//var cell = UITableViewCell()
#IBOutlet weak var itemList: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int{
return toDoList.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell{
var cell = UITableViewCell(style: UITableViewCellStyle.Default, reuseIdentifier: "Cell")
cell.textLabel.text = toDoList[indexPath.row]
return cell
}
override func viewWillAppear(animated: Bool) {
if var storedItems: AnyObject = NSUserDefaults.standardUserDefaults().objectForKey("items"){
toDoList = []
for var i = 0; i < storedItems.count; ++i{
toDoList.append(storedItems[i] as NSString)
}
}
itemList.reloadData()
}
func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath){
if editingStyle == UITableViewCellEditingStyle.Delete{
toDoList.removeAtIndex(indexPath.row)
let saveData = toDoList
NSUserDefaults.standardUserDefaults().setObject(saveData, forKey: "items")
NSUserDefaults.standardUserDefaults().synchronize()
itemList.reloadData()
}
}
}
What's causing your error is
itemList.reloadData()
in your function
func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath)
So to fix your problem, remove that line and then add this line after toDoList.removeAtIndex(indexPath.row):
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.None)
What this method does is: Deletes the rows specified by an array of index paths, with an option to animate the deletion. (from Xcode Quick Help)