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
Related
I am trying to have a UICollectionView that holds different UIViews as its cells. Is this possible or do I have to make them UICollectionViewCells?
I don't have an objective-c example, but you should be able to get the concept from the code example below.
An example how you can create a cell that wraps a UIView and is more reusable
class ProfileView: UIView {
var imageView: UIImageView!
var name: UILabel!
}
class ProfileCollectionViewCell: UICollectionViewCell {
let profileView = ProfileView()
init() {
super.init()
configureConstraints()
}
func configureConstraints() {
// use a handy extension you've already built
contentView.addSubView(profileView)
profileView.pinToEdges(of: contentView)
}
}
func collectionView(_ collectionView: UICollectionView,
cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let row = self.objects[indexPath.row]
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "someId" for: indexPath) as? ProfileCollectionViewCell
cell?.profileView.imageView.image = row["image"]
cell?.profileView.name.text = row["name"]
return cell
}
note: you may need to manage 'resetting the cells state' before it gets reused with something like:
override prepareForReuse() {
super.prepareForReuse()
profileView.imageView.image = nil
profileView.name.text = ""
}
You have to return UICollectionViewCells. UICollectionView don't accept UIViews.
What you can do is create a generic UICollectionViewCell that can embed any UIView.
The reason is because collection view cells have specific composition for layout and recycling.
Also, you add child in your UIView directly on the view itself, collection view cells have a contentView, like UITableViewCells.
I am attempting to use the Darkseal Downpicker inside a UITableView. I am programatically adding a UITextField and then adding the Downpicker as follows:
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
{
var textField = UITextField()
let cell = UITableViewCell(style: .default, reuseIdentifier: nil)
cell.selectionStyle = .none
textField.text = "TEST"
textField.frame = CGRect(x: CGFloat(0), y: CGFloat(0), width: CGFloat(170), height: CGFloat(30))
var dp: DownPicker!
let test1 = ["test one", "test two"]
dp = DownPicker(textField: textField, withData: test1)
cell.contentView.addSubview(dp)
return cell
}
If I just add the textfield:
cell.contentView.addSubview(textField)
Then it displays the text field. However if I add the DownPicker as shown above:
cell.contentView.addSubview(dp)
I get nothing displayed, just an empty tableview. Any help understanding why the DownPicker is not displayed would be appreciated. Thanks.
You need to add both ur UITextField and ur DownPicker into the View. If it's anything like the UIPickerView then your DownPicker will only show when you select the UITextField. Also you need to add your DownPicker to the view rather then the cell.
view.addSubView(dp)
EDIT
"It takes any UITextField already present in your code (including those added to a Storyboard):" - https://github.com/Darkseal/DownPicker
EDIT 2
From looking at the docs what you want to do is add yourself as the observer on the DataPicker by doing the following inside the cellForRowAt func
dp.addTarget(self, action: #selector(dp_selected(sender:)), for: .valueChanged)
You want to add a func the class with cellForRowAt func inside it
func dp_selected(sender: AnyObject) {
guard let dp = sender as? DropDown else { return }
if let textfield = dp.getTextField() as? UITextField {
guard let indexPath = tableView.indexPath(for: textfield.superview) else { return }
}
}
This function will check if the sender is of type DropDown class and if it is will try to get the UITextField that it's attached to and if that is returned it will attemt to get the IndexPathat which it's being used at this can be nil if the cell is no longer visible on the screen but hopefully that will never be the case and have added a check to make sure it exists.
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
})
}
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
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)
}
}
}