I have used Worm Tab Strip cocoapod to get tabs like android, the name of tabs are from server response, I need n number of view controllers based on the number of tab names.
For testing purpose, I have hardcoded tab names, and for each particular tab name, I have another array of sub names. My question is how do I change the tableview contents so that, I get an exact number of sub names according to the tab names
var tabNames = ["Brands", "Sports","Movies", "Mobile","Games"]
var brandsNames = ["Addidas", "Nike","Puma"]
var sportsName = ["Cricket","Fifa","Hockey","Baseball"]
var moviesName = ["Mission Impossible","Matrix","Avatar","Titanic"]
var mobileNames = ["Nokia","Redmi","Samsung"]
var gameNames = ["FIFA 19","PES 19","WWE 2K19","Max Payne"]
What should i try in
func tableView(_ tableView: UITableView, numberOfRowsInSection
section: Int) -> Int {
// return fruits.count
}
And
func tableView(_ tableView: UITableView, cellForRowAt indexPath:
IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell",
for: indexPath) as! Cell1
//cell.textLabel?.text = fruits[indexPath.row]
return cell
}
I need to get for Brands tab, I need brandsNames as tableview
contents.
The tableview contents must change according to the tab names.
Create a custom struct as data model for example
struct Category {
let name : String
let items : [String]
}
Declare a data source array and an index
var categories = [Category]()
var index = 0
In viewDidLoad populate the data source array and set index of the current index of the UISegmentedControl
categories = [Category(name:"Brands", items: ["Addidas", "Nike","Puma"]),
Category(name:"Sports", items: ["Cricket","Fifa","Hockey","Baseball"]),
Category(name:"Movies", items: ["Mission Impossible","Matrix","Avatar","Titanic"]),
Category(name:"Mobile", items: ["Nokia","Redmi","Samsung"]),
Category(name:"Games", items: ["FIFA 19","PES 19","WWE 2K19","Max Payne"])]
index = // current index of the segmented control
in the IBAction of the segmented control set the index and reload the table view
#IBAction func categorySelection(_ sender: UISegmentedControl) {
index = sender.selectedSegmentIndex
tableView.reloadData()
}
The data source methods are
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return categories[index].items.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! Cell1
cell.textLabel?.text = categories[index].items[indexPath.row]
return cell
}
I used this enter link description here as a reference So that I can pass ID of particular tab to tableview in viewcontroller and load that Tablview, So now I can dynamically add new tabs and the corresponding Tablview also changes
Related
I am trying to filter a song array so it only has songs where the song artistName is the same as ArtistName(Which is always the selected artist). When I run my app it throws an Fatal error: Index out of range even though in my debug console artistSongs has 4 elements. I don't understand how id be getting this crash.
override func viewDidLoad() {
super.viewDidLoad()
retriveData()
//Register nib
topSongTableView.register(TopSongTableViewCell.nib(), forCellReuseIdentifier: TopSongTableViewCell.topSongCell)
ArtistPicture.image = artistCover
ArtistLabel.text = ArtistName
//Assign TableView to self
topSongTableView.delegate = self
topSongTableView.dataSource = self
}
//Define number of rows in topSongsTableView
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 5
}
// songs of artist
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "TopSongTableViewCell", for: indexPath) as! TopSongTableViewCell
let artistSongs = songs.filter{ $0.artistName == ArtistName }
print(artistSongs)
cell.TopSongLabel.text = artistSongs[indexPath.row].cleanName //CASH
cell.SongImage.image = UIImage(named: artistSongs[indexPath.row].cover)
return cell
}
Your problem is that your tableView topSongTableView expects to display 5 rows (you hard coded it) but when you're dequeuing your cells, you also filter artistSongs at the same time (it shouldn't be done here) and this produces in your case an array with less than 5 elements (4 in your case).
So here in func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell, you're trying to dequeue more cells than elements in artistSongs.
Let's say let artistSongs = songs.filter{ $0.artistName == ArtistName } produces an array of 3 elements only but your table view expects 5, when you dequeue your cells and try to access the song with artistSongs[indexPath.row], it's gonna work for the first 3 rows and then it will crash (your current crash).
Your solution is to filter the artist songs somewhere else, say in viewDidLoad, and then use this array to populate your table view safely:
// ADD THIS
var filteredSongs: [Song]()
override func viewDidLoad() {
super.viewDidLoad()
[...]
// ADD THIS
self.filteredSongs = songs.filter{ $0.artistName == ArtistName }
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// CHANGE THIS
return self.filteredSongs.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "TopSongTableViewCell", for: indexPath) as! TopSongTableViewCell
// REMOVE THIS
//let artistSongs = songs.filter{ $0.artistName == ArtistName }
// REMOVE THIS
//print(artistSongs)
cell.TopSongLabel.text = self.filteredSongs[indexPath.row].cleanName
cell.SongImage.image = UIImage(named: self.filteredSongs[indexPath.row].cover)
return cell
}
I want to display three different entitys from core data on a table view. I can do this with one entity and tried to carry that logic over to displaying three on the same table view. I used the same entity in the code below to test this. I am getting blank sections in my table view. I must have the cellForRowAt method wrong? Here is my code.
var word: [NSManagedObject] = []
let sections = ["Custom Library", "Mastered Words", "Library"]
var array = [
[NSManagedObject](),
[NSManagedObject](),
[NSManagedObject]()
]
override func viewDidLoad() {
super.viewDidLoad()
tableView.register(UITableViewCell.self, forCellReuseIdentifier: "Cell2")
array = [
word,
word,
word
]}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return array[section].count
}
func numberOfSections(in tableView: UITableView) -> Int {
sections.count
}
func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
return self.sections[section]
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let customWord = array[indexPath.row][indexPath.section]
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell2", for: indexPath)
cell.textLabel?.text = customWord.value(forKeyPath: "title") as? String
return cell
Based on the code you've shown, your array property is an array of empty arrays as word is an empty array itself. If you're using array to determine the number of rows in each section based on the array at that section index, then you're going to get 0 rows for each section.
I have a collection view with 4 cells and a table view inside the same view controller. Each cell in the CV must make the table view display a different list; one table cell type per CV cell. When the user taps on one CV cell the table must reload its data and display the correct type of cell, (basically a different list with a custom cell). Each of these lists contains only 1 section.
I created and registered all my different cells with the table view and have all my data ready, with the views set and so on. How do I make the table view discard its current cells (list) and show a new list with different cells when the user has tapped on another CV cell?
I suppose that the solution is in the didSelectItem method from the CV delegate but I cannot find any information that shows how to make the table dequeue a different type of cell when the user has changed the cell selection inside the CV; or discard the previous one if needed.
At the moment I only register and dequeue one type of cell, and inside the delegate method for the CV I am calling empty functions that are supposed to put the new list inside the table.
The number of rows for each list is dynamic and this implies that I would have to call the delegate method on the table view again.
I have found an example of the MVVM pattern but I cannot apply it to my logic as that is more static.
Any help would be much appreciated. Thank you.
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
let selectedMenuTab = indexPath.item
switch selectedMenuTab { // show different type of cell.
case 0: showAList()
case 1: showBList()
case 2: showCList()
case 3: showDList()
default:
print("no such main tab")
}
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableOfConversations.dequeueReusableCell(withIdentifier: rowID, for: indexPath) as! ConversationsListCell
let messageInChatList = listOfOneToOneChats[indexPath.item]
cell.messageInChatList = messageInChatList
cell.selectionStyle = .none
return cell
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return listOfOneToOneChats.count
}
I think this should be as simple as calling tableView.reloadData() at the end of the collection view delegate's didSelectItemAt method.
The tableView should have it's data source based on a common array, for example:
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return displayingList.count
}
And then in the didSelect of the collection view set that array and then tell the tableView to reload:
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
let selectedMenuTab = indexPath.item
switch selectedMenuTab { // show different type of cell.
case 0: displayingList = listA
case 1: displayingList = listB
case 2: displayingList = listC
case 3: displayingList = listD
default:
print("no such main tab")
}
tableView.reloadData()
}
And for dequeueing cells, check based on the type if they are different, or based on selectedMenuTab:
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell: UICollectionViewCell
let selectedMenuTab = indexPath.item
switch selectedMenuTab { // show different type of cell.
case 0: cell = tableOfConversations.dequeueReusableCell(withIdentifier: rowID, for: indexPath) as! ConversationsListCell
//And so on
default:
fatalError("No cell for this tab")
}
let item = displayingList[indexPath.item]
// Cell setup
return cell
}
The type of the values will be something to consider in order to avoid an array of Any, which would not be super type-safe, but that will depend on the types of your objects.
I have implemented side menu in tableview and now my scenario is like, I have to manage sidemenu options as user types
Let me show my code
var items = ["Social Media Post", "Messages", "Manage User","My Account","Information","Logout"]
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return items.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell") as! MenuTableViewCell
cell.lblTitle.text = items[indexPath.row]
cell.imgMenuLogo.image = image[indexPath.row]
print(User_type)
if User_type == 2{
items.remove(at: 0)
}
return cell
}
but now i want . to de like this
if user_type == "3"{
// Social Media , Messages And Manage User options i want to remove
}
I am not able to understand how to remove from index.
Try something like this:
override func viewDidLoad() {
super.viewDidLoad()
getList()
}
func getList(){
switch userType{
case 0:
items = ["UserTypeOne_Home","UserType_One Settings","etc"]
break
case 1:
items = ["UserTypeTwo_Home","UserType_Two Settings","etc"]
break
default:
break
}
self.tableView.reloadData()
}
extension ViewController: UITableViewDelegate,UITableViewDataSource{
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return items.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
var cell = tableView.dequeueReusableCell(withIdentifier: "Some ID")
cell?.textLabel?.text = items[indexPath.row]
return cell!
}
}
Try not to change the array from within the cellForRowAt indexPath method using indexPath.row, that will not give you the result you want. Modulate the array from outside the protocol method overrides, and just call the reloadData() method.
Try to use enum of UserType and check type of current user than Make an array with default options available to every user and then append specific data in array according to user type. Hope it clarifies :)
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell") as! MenuTableViewCell
cell.lblTitle.text = items[indexPath.row]
cell.imgMenuLogo.image = image[indexPath.row]
print(User_type)
if User_type == 2{
items.remove(at: 0)
}
return cell
}
This will work, But you have done a small mistake here.
You have removed from array after setting label. So you need to remove the item from array first then do set label.
Btw, I will not recommend this method as you need to add/remove from array for every cellForRowAt method.
My data is coming in modal class named Menu by creating its object menus. Now How can i send the menu names to tableview to show in particular cell
var menus = [Menu]()
for (_, content) in json {
let menu = Menu(id: Int(content["id"].stringValue),
name: content["name"].string,
image: content["image"].string,
coupon: content["coupon"].int,
icon: content["icon"].string,
order: Int(content["order"].stringValue),
aname: content["name"].string,
options: Int(content["options"].stringValue),
subcategory:content["subcategory"].arrayObject)
menus.append(menu)
}
for menu in menus {
print(menu.name)
print(menu.id)
print(menu.subcategory)
}
print(menus.count)
Here All the data is saved in Menu class by the help of menus object.I have added the codes to show data to tableview. here i have created custom tableview and trying to populate it
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 {
return menus.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Menucell", forIndexPath: indexPath)as! MENUTableViewCell
cell.Ordermenu.text = (" \(menus[indexPath.row])")///here its not fetching the value
return cell
}
Its not working . how the implementation should be ?
It shows the projectName.classname
updated after accepting answer
Try below line of code. Hope it will help you...
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Menucell", forIndexPath: indexPath)as! MENUTableViewCell
let menu : Menu = menus[indexPath.row]
cell.Ordermenu!.text = menu. name
return cell
}
Do you register the table cells? Try something like this...
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
var cell: MENUTableViewCell! = tableView.dequeueReusableCellWithIdentifier("MENUTableViewCellIDENTIFIER") as? MENUTableViewCell
if cell == nil
{
let nib: UINib = UINib(nibName:"MENUTableViewCell", bundle: nil)
tableView.registerNib(nib, forCellReuseIdentifier:"MENUTableViewCellIDENTIFIER")
cell = tableView.dequeueReusableCellWithIdentifier("MENUTableViewCellIDENTIFIER") as! CompactIncidentCellView
//cell.selectionStyle = UITableViewCellSelectionStyle.None
}
// work with cell here...
cell.Ordermenu.text = (" \(menus[indexPath.row])")
return cell
}