I pass data(value) from a ViewController to a TableView (see below), but the tableview fill always only the first row. It don´t count. How can I fix it?
The tableview should show every passing data in a new row.
#IBAction func a(sender: UIButton) {
txtBalkenbewehrung = ausgabe.text
performSegueWithIdentifier("transferfile", sender: sender)
}
import UIKit
var txtBalkenbewehrung: String?
class EBTableViewController: UITableViewController, UITableViewDelegate, UITableViewDataSource {
var rowData = [txtBalkenbewehrung]
override func viewDidLoad() {
super.viewDidLoad()
self.tableView.editing = true
self.tableView.reloadData()
// 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 Potentially incomplete method implementation.
// Return the number of sections.
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete method implementation.
// Return the number of rows in the section.
return rowData.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("textcell",
forIndexPath: indexPath) as! UITableViewCell
// let data = rowData[indexPath.row]
cell.textLabel!.text = rowData[indexPath.row]
return cell
}
`
First, please make sure that you correctly format your code!
The behavior seems coherent, as the data is a an array with a single element, txtBalkenbewehrung
You need to fill the array with more element if you want to display more than one
Related
I am trying to retrieve data from an online database, and I do that successfully; However, after retrieving the data from the database I would like to store it in an array and then populate a listview and a mapview with it's data, but there is a problem, I am able to load the data and store it and view it, however the problem is that everytime the app loads no information appears until I go to another scene and go back, because I am populating the array though the AppDelegate. However, if I populate it through the viewdidload I get duplicate items in my table view.
Here is my code:
Approach number 1, which leads to duplicates
StoreViewController.swift
class StoreViewController: UIViewController, CLLocationManagerDelegate, MKMapViewDelegate, UITextFieldDelegate, UITableViewDataSource, UITableViewDelegate, StoresModelProtocoal {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
drawForm()
setUpMap()
self.hideKeyboardWhenTappedAround()
getCurrentLocation()
let hideStoreDetail: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(self.hideStoreDetails))
Map.addGestureRecognizer(hideStoreDetail)
//Create a nib for the custom cell and use it in the table
let nib = UINib(nibName: "CustomStoreCell", bundle: nil)
StoresListTable.registerNib(nib, forCellReuseIdentifier: "customStoreCell")
let storesModel = StoresModel()
storesModel.delegate = self
storesModel.downloadItems()
}
func itemsDownloaded(items: NSArray) {
print("Items downloaded")
for item in items
{
if let s = item as? Store
{
print(s.Address)
Globals.unsortedStoresList += [s]
Map.addAnnotation(s.Annotation)
do_table_refresh()
}
}
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return Globals.unsortedStoresList.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell:CustomStoreCell = self.StoresListTable.dequeueReusableCellWithIdentifier("customStoreCell") as! CustomStoreCell
let s = Globals.unsortedStoresList[indexPath.row]
cell.loadItem(s.Name, StoreAddress: s.Address, StoreHoursOfOperation: s.HoursOfOperation, StoreDistanceFromCurrentLocation: String(s.DistanceFromCurrentLocation))
return cell
}
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
//tableView.deselectRowAtIndexPath(indexPath, animated: true)
let s = Globals.unsortedStoresList[indexPath.row]
print(s.Name)
print(s.Address)
print(s.HoursOfOperation)
print(s.DistanceFromCurrentLocation)
//print("You selected cell #\(indexPath.row)!")
}
func do_table_refresh()
{
dispatch_async(dispatch_get_main_queue(), {
self.StoresListTable.reloadData()
return
})
}
I know this one duplicates the items because everytime the view is loaded it re-downloads all the data again; therefore, I tried looking for a better way and then I thought about doing the downloading process in my AppDelegate and then just write couple functions that take data from the array and display it, but the problem here is that the data would be displayed on the TableView right away without duplicates but it won't be displayed on the mapview at first run, instead I have to go to another scene and go back in order for the data to be displayed on the map.
Approach number 2
StoreViewController.swift
class StoreViewController: UIViewController, CLLocationManagerDelegate, MKMapViewDelegate, UITextFieldDelegate, UITableViewDataSource, UITableViewDelegate {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
drawForm()
setUpMap()
self.hideKeyboardWhenTappedAround()
getCurrentLocation()
let hideStoreDetail: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(self.hideStoreDetails))
Map.addGestureRecognizer(hideStoreDetail)
//Create a nib for the custom cell and use it in the table
let nib = UINib(nibName: "CustomStoreCell", bundle: nil)
StoresListTable.registerNib(nib, forCellReuseIdentifier: "customStoreCell")
loadMapAnnotations()
}
func loadMapAnnotations(){
for item in Globals.unsortedStoresList
{
Map.addAnnotation(item.Annotation)
do_table_refresh()
}
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return Globals.unsortedStoresList.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell:CustomStoreCell = self.StoresListTable.dequeueReusableCellWithIdentifier("customStoreCell") as! CustomStoreCell
let s = Globals.unsortedStoresList[indexPath.row]
cell.loadItem(s.Name, StoreAddress: s.Address, StoreHoursOfOperation: s.HoursOfOperation, StoreDistanceFromCurrentLocation: String(s.DistanceFromCurrentLocation))
return cell
}
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
//tableView.deselectRowAtIndexPath(indexPath, animated: true)
let s = Globals.unsortedStoresList[indexPath.row]
print(s.Name)
print(s.Address)
print(s.HoursOfOperation)
print(s.DistanceFromCurrentLocation)
//print("You selected cell #\(indexPath.row)!")
}
func do_table_refresh()
{
dispatch_async(dispatch_get_main_queue(), {
self.StoresListTable.reloadData()
return
})
}
AppDelegate.swift
class AppDelegate: UIResponder, UIApplicationDelegate, StoresModelProtocoal {
var window: UIWindow?
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
// Override point for customization after application launch.
let storesModel = StoresModel()
storesModel.delegate = self
storesModel.downloadItems()
return true
}
//////////////////////////////////////
//Delegates
//////////////////////////////////////
func itemsDownloaded(items: NSArray) {
print("Items downloaded")
for item in items
{
if let s = item as? Store
{
print(s.Address)
Globals.unsortedStoresList += [s]
//Map.addAnnotation(s.Annotation)
}
}
}
Any help would be appreciated, Thanks in advance.
I was able to find a temporarily solution to the problem
I modified StoreViewController.swift to this, if anyone is having a similar problem.
class StoreViewController: UIViewController, CLLocationManagerDelegate, MKMapViewDelegate, UITextFieldDelegate, UITableViewDataSource, UITableViewDelegate, StoresModelProtocoal {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
drawForm()
setUpMap()
self.hideKeyboardWhenTappedAround()
getCurrentLocation()
let hideStoreDetail: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(self.hideStoreDetails))
Map.addGestureRecognizer(hideStoreDetail)
//Create a nib for the custom cell and use it in the table
let nib = UINib(nibName: "CustomStoreCell", bundle: nil)
StoresListTable.registerNib(nib, forCellReuseIdentifier: "customStoreCell")
Globals.unsortedStoresList.removeAll() //I added this line of code to remove the old list
let storesModel = StoresModel()
storesModel.delegate = self
storesModel.downloadItems()
}
func itemsDownloaded(items: NSArray) {
print("Items downloaded")
for item in items
{
if let s = item as? Store
{
print(s.Address)
Globals.unsortedStoresList += [s]
Map.addAnnotation(s.Annotation)
}
}
do_table_refresh()
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return Globals.unsortedStoresList.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell:CustomStoreCell = self.StoresListTable.dequeueReusableCellWithIdentifier("customStoreCell") as! CustomStoreCell
let s = Globals.unsortedStoresList[indexPath.row]
cell.loadItem(s.Name, StoreAddress: s.Address, StoreHoursOfOperation: s.HoursOfOperation, StoreDistanceFromCurrentLocation: String(s.DistanceFromCurrentLocation))
return cell
}
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
//tableView.deselectRowAtIndexPath(indexPath, animated: true)
let s = Globals.unsortedStoresList[indexPath.row]
print(s.Name)
print(s.Address)
print(s.HoursOfOperation)
print(s.DistanceFromCurrentLocation)
//print("You selected cell #\(indexPath.row)!")
}
func do_table_refresh()
{
dispatch_async(dispatch_get_main_queue(), {
self.StoresListTable.reloadData()
return
})
}
My setup:
`UITableViewController` (ComboViewController)
-> Several Static Cells
-> One Static Cell contains a dynamic `tableView`
I need to use a custom Delegate/DataSource because the dynamic tableView is embedded in the Static TableView within the TableViewController
This custom Delegate/DataSource looks like this:
class DataSource: NSObject, UITableViewDataSource, UITableViewDelegate {
// class variables
override init() {
super.init()
// initialize variables
}
//some data source/ delegate methods like number of rows, cellForRowAtIndexPath
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
var indexedCombos: NSDictionary?
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let comboVC: ComboInfoViewController = storyboard.instantiateViewControllerWithIdentifier("ComboInfo") as! ComboInfoViewController
comboVC.doSegue()
}
}
Within ComboViewController I have this:
class ComboInfoViewController: UITableViewController {
func doSegue() {
self.performSegueWithIdentifier("tosingle", sender: combListTable)
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "tosingle" {
//do stuff
}
}
}
If the segue is modal I get this error:
Warning: Attempt to present SingleProductViewController on ComboInfoViewController whose view is not in the window hierarchy!
If the segue is push, then the prepareForSegue method gets called, but the viewController does not push! What is happening?
I've searched and searched. But I have no idea what could be resulting in this behavior.
When you create the ComboInfoViewController instance with this line,
let comboVC: ComboInfoViewController = storyboard.instantiateViewControllerWithIdentifier("ComboInfo") as! ComboInfoViewController
You're creating a new instance that is not the one you have on screen, and never will be, so that's why you get the error. It is very important that you understand this concept; understanding how view controllers are created, and how to get pointers to ones that already exist is fundamental to iOS programming.
However, in this case you don't even need to get a pointer to the one on screen, because you should connect the segue directly from the cell (the dynamic prototype), which means you won't need any code to execute it. You can delete the didSelectRowAtIndexPath method, and the doSegue method. You only need to implement prepareForSegue. If you need to pass information to the next controller based one which row was touched, you can do it like below. The table view controller code should now look like this (this is an update of the code in my answer to this question, Swift: TableView within Static UITableViewCell),
class ComboInfoViewController: UITableViewController {
#IBOutlet weak var staticTableView: UITableView!
#IBOutlet weak var dynamicTableView: UITableView!
var dataSource = DataSource()
override func viewDidLoad() {
super.viewDidLoad()
dynamicTableView.dataSource = dataSource
dynamicTableView.delegate = dataSource
}
override func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
if indexPath.row != 1 {
return 44
}else{
return 250 // the second cell has the dynamic table view in it
}
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "tosingle" {
var cell = sender as! UITableViewCell
var indexPath = dynamicTableView.indexPathForCell(cell)
var dataPoint = dataSource.theData[indexPath!.row] // theData is the array used to populate the dynamic table view in the DataSource class
// pass dataPoint to the next view controller which you get from segue.destinationviewController
println(dataPoint)
}
}
}
I followed this tutorial instead of nib files, i used storyboarding. I have no idea what mistake i did. When i run it, its just showing the 10 tableview cells, it does not displaying the values that i passed.
This is the code i used ->
// MARK: - NSTableViewDataSource
func numberOfRowsInTableView(aTableView: NSTableView!) -> Int {
return 10
}
func tableView(tableView: NSTableView!, viewForTableColumn tableColumn: NSTableColumn!, row: Int) -> NSView! {
// 1
var cellView: NSTableCellView = tableView.makeViewWithIdentifier(tableView.identifier, owner: self) as NSTableCellView
// 2
if tableColumn.identifier == "BugColumn" {
// 3
cellView.imageView!.image = NSImage(named: "delete")!
cellView.textField!.stringValue = "Alvin"
return cellView
}
return cellView
}
override func awakeFromNib()
{
self.tableView.setDataSource(self)
self.tableView.setDelegate(self)
}
Please help me to figure out, what i missing in here.? Output : i am just getting the default tableView cells ten times, there are values that i given in the dataSource. Thanks in advance.
You're using the tableView's identifier, but instead you should use the tableColumn's one:
var cellView: NSTableCellView = tableView.makeViewWithIdentifier(tableView.identifier, owner: self) as NSTableCellView
// ^^^^^^^^^
var cellView: NSTableCellView = tableView.makeViewWithIdentifier(tableColumn.identifier, owner: self) as NSTableCellView
I'm fairly new to xcode and Objective-C. Here is my problem:
I have a view controller with buttons and links to other view controllers on it.
On this view controller I have added a table view in which the cells will be used like a form
the cells will have text fields and labels
When trying to set this up and building it, it gives me an error saying I need to wire up my table view to the view controller somehow.
I know it is something to do with the data source and the table view delegate but I don't know how to wire the table view to the data source and delegate of my view controller.
Could anyone tell me how, or link me to an easy to follow guide on this?
Thanks
The easiest way would be to create a new Swift, or Objective-C Class and extend UITableViewController with it. This will create you a perfect sample code on how to write a UITableView DataSource and Delegate, which could be just copied.
After that, set your UITableViews delegate and datasource properties to self in viewdidload and implement UITableViewDataSource, UITableViewDelegate.
Edit
import UIKit
class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
#IBOutlet weak var myTable: UITableView!
var myDataArray: NSArray!
override func viewDidLoad() {
super.viewDidLoad()
myDataArray = NSArray(objects: "Peter", "Paul", "Marry")
myTable.dataSource = self
myTable.delegate = self
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
//MARK: TableView DataSource
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return myDataArray.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
var cell: UITableViewCell? = tableView.dequeueReusableCellWithIdentifier("Cell") as? UITableViewCell
if (cell == nil) {
cell = UITableViewCell(style: UITableViewCellStyle.Default, reuseIdentifier: "Cell")
}
cell?.textLabel.text = myDataArray.objectAtIndex(indexPath.row) as NSString
return cell!
}
//MARK: TableView Delegate
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
tableView.deselectRowAtIndexPath(indexPath, animated: true)
}
}
I quickly wired you up some Swift Example code, where you can see how to connect a table view, with the DataSource and Delegate of your Class.
I am making a tableView programatically. For some reason the table view is always empty. Please help me find the bug. Here is my code
// Set all view we will need
func setupTableView() {
self.tableView = UITableView(frame: CGRectMake(0, 20, 320, self.heighTableView))
self.tableView!.tableHeaderView = UIView(frame: CGRectMake(0, 0, self.view.frame.size.width, CGFloat(self.heighTableViewHeader)))
self.tableView!.backgroundColor = UIColor.clearColor()
self.tapMapViewGesture = UITapGestureRecognizer(target: self, action: "handleTapMapView:")
self.tapTableViewGesture = UITapGestureRecognizer(target: self, action: "handleTapTableView:")
self.tapTableViewGesture!.delegate = self
self.tableView!.tableHeaderView?.addGestureRecognizer(self.tapMapViewGesture!)
self.tableView!.addGestureRecognizer(self.tapTableViewGesture!)
// Init selt as default tableview's delegate & datasource
//self.tableView!.dataSource = self
self.tableView!.delegate = self
self.view.addSubview(self.tableView!)
}
// UITableViewDataSource Methods
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 10
}
func tableView(tableView:UITableView!, heightForRowAtIndexPath indexPath:NSIndexPath)->CGFloat {
return 80
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
var identifier = "Cell"
var cell = tableView.dequeueReusableCellWithIdentifier(identifier) as UITableViewCell?
cell!.textLabel!.text = "Hello World !"
// }
return cell!
}
Try this :
class ViewController: UIViewController, UITableViewDelegate, MKMapViewDelegate, UIGestureRecognizerDelegate,UITableViewDataSource
then replace your function by copying this two functions by command + click on UITableViewDataSource:
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int{
}
and other one is :
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell{
}
and put all the code into this two function and try again becouse in your code this two functions are not getting called but by doing this your function will called and you have put all the required code into this function.
and also remove comment from
self.tableView!.dataSource = self
May be this can help you.
Edit For this Answer:
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell{
var identifier : NSString = "Cell"
var cell = tableView.dequeueReusableCellWithIdentifier(identifier) as? UITableViewCell
if !(cell != nil) {
cell = UITableViewCell(style: UITableViewCellStyle.Value1, reuseIdentifier: identifier)
}
cell?.textLabel?.text = "Hello World"
return cell!
}