I just cannot seem to update data in Swift! I am trying to build a radio player app for a friends radio station so when a song changes I need to update the playlist viewcontroller.
The data from my Main View Controler is a instance of a struct. I know there is data being generated and it is passed to the table but for whatever reason the array isn't updating. I am sure it is something simple.
I have tried directly injecting the data with a call, using a protocol and using a function. Using the protocol and function I can see the passed data via print statement.
class PlaylistVC: UIViewController, UITableViewDelegate, UITableViewDataSource {
//Mark: Variables ~~~~~~~~~~~~###########################################
var sourceDatas = [PlaylistData]()
//Mark: View Containers ~~~~~############################################
private let bg = GradientBG()
private let closeButton = UIButton()
let playlistTable = UITableView()
//Mark: Overrides ~~~~~~~~~~~~###########################################
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
playlistTable.delegate = self
playlistTable.dataSource = self
layoutUI()
setupTable()
setupClose()
}
//Mark: objc func's ~~~~~~~~~~~###########################################
#IBAction func handleXButton() {
dismiss(animated: true, completion: nil)
}
func handleMoreInfo(_ playlist: PlaylistData) {
let vc = SongPopUp()
vc.buildLables(playlist)
vc.modalPresentationStyle = .overCurrentContext
self.present(vc, animated: true, completion: nil )
}
//##################################################################
//Mark: Pass Data ##################################################
//Mark: Not Working!! ##############################################
//##################################################################
func handlePlaylist(_ with: PlaylistData) {
print(with)
sourceDatas.append(with)
//sourceDatas.insert(with, at: 0)
playlistTable.reloadData()
}
//Mark: Table view ################################################
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return sourceDatas.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell:UITableViewCell = UITableViewCell(style: .subtitle, reuseIdentifier: "myCell")
cell.backgroundColor = .clear
cell.selectionStyle = .none
tableView.dequeueReusableCell(withIdentifier: "myCell", for: indexPath)
if let text = cell.textLabel {
components.layoutHeadingLable(sender: text, title: sourceDatas[indexPath.row].heading, size: 20)
}
if let dtext = cell.detailTextLabel {
components.layoutSubheadingLable(sender: dtext, title: sourceDatas[indexPath.row].subheading, size: 14)
}
if sourceDatas[indexPath.item].hasStoreLink {
cell.accessoryType = .detailButton
cell.tintColor = .white
}
return cell
}
func tableView(_ tableView: UITableView, accessoryButtonTappedForRowWith indexPath: IndexPath) {
let dataToPass = self.sourceDatas[indexPath.row]
print("Extended~~~~~~~~~~~~~~~~~~~~")
print(dataToPass)
handleMoreInfo(sourceDatas[indexPath.row])
}
//Mark: Setup Table ~~~~~~~~~~~~~~###########################################
func setupTable() {
playlistTable.backgroundColor = .clear
playlistTable.separatorStyle = .singleLine
playlistTable.rowHeight = 45
playlistTable.register(UITableViewCell.self, forCellReuseIdentifier: "myCell")
}
......
I think it's something wrong with your cellForRowAt
Try to make it simple first, like:
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "myCell", for: indexPath) as! UITableViewCell
cell.textLabel?.text = sourceDatas[indexPath.row]
return cell
}
See whether you can find the added object. Then dive into the detail settings of your cell.
I made 4 identical cells with subviews by using UITableViewCell subclass 'FruitTableViewCell' class.
FruitTableViewCell.swift
class FruitTableViewCell: UITableViewCell, UITextFieldDelegate {
var fruitsTextField = UITextField()
override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
self.contentView.addSubview(fruitsTextField)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func layoutSubviews() {
super.layoutSubviews()
fruitsTextField.frame = CGRect(x: 100, y: 7.5, width: 50, height: 30)
fruitsTextField.backgroundColor = UIColor.darkGray
fruitsTextField.delegate = self
}
}
TableViewController.swift
class TableViewController: UITableViewController, UITextFieldDelegate {
let fruitsComponents: [String] = ["Apple", "Banana", "Grape", "Pear"]
let cellReuseidentifier = "cell"
override func viewDidLoad() {
super.viewDidLoad()
tableView.register(FruitTableViewCell.self, forCellReuseIdentifier: cellReuseidentifier)
}
override func numberOfSections(in tableView: UITableView) -> Int {
sections
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return fruitsComponents.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: cellReuseidentifier, for: indexPath) as! FruitTableViewCell
cell.textLabel?.text = fruitsComponents[indexPath.row]
return cell
}
}
It works well.
But in fact, I want to add different accessories(or subviews) for each cell. Row 0 for UITextField, Row 1 for UILabel, Row 2 for Stepper, Row 3 for UILabel, ... and so on.
So I made the other UITableViewCell subclass 'AnotherFruitTableViewCell' class to use.
And I tried by using 'if' statement.
revised TableViewController.swift
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if indexPath.row == 0 {
let cell = tableView.dequeueReusableCell(withIdentifier: cellReuseidentifier, for: indexPath) as! FruitTableViewCell
cell.textLabel?.text = fruitsComponents[indexPath.row]
return cell
} else {
let cell = tableView.dequeueReusableCell(withIdentifier: cellReuseidentifier, for: indexPath) as! AnotherFruitTableViewCell
cell.textLabel?.text = fruitsComponents[indexPath.row]
return cell
}
But the message 'could not cast value of type' poped up.
Because of this code, I think.
override func viewDidLoad() {
super.viewDidLoad()
tableView.register(FruitTableViewCell.self, forCellReuseIdentifier: cellReuseidentifier)
}
And fundamentally, I think 'if' statement is not a good way to add different accessories for each cells.
How can I add different accessories(or subviews) for each cell?
You registered your FruitTableViewCell but not registered AnotherFruitTableViewCell
I have UITableView with 2 expanded Sections.
So, when I click on section's header, rows will be hidden:
override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
print("Section: \(indexPath.section), Row \(indexPath.row), \(sections[indexPath.section].expanded)")
if sections[indexPath.section].expanded {
return 88
} else {
return 0
}
}
I am adding an UIlabel to a cell in UITableView as below:
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: cellId, for: indexPath)
let label = UILabel()
cell.contentView.addSubview(label)
label.translatesAutoresizingMaskIntoConstraints = false
label.leftAnchor.constraint(equalTo: cell.leftAnchor).isActive = true
label.topAnchor.constraint(equalTo: cell.topAnchor).isActive = true
label.widthAnchor.constraint(equalTo: cell.widthAnchor).isActive = true
label.heightAnchor.constraint(equalToConstant: 30).isActive = true
label.text = "row = \(indexPath.row)"
return cell
}
The above is working but cells are not properly showing the screen as sometime, the content of row1 is printed in another row.
If I add the below code, and when I click on a header of any section, the rows will be properly showing on the tableView, but just one time, I mean if I click one more time on the header, an error occurs inside CellForRowAt function (Thread 1: EXC_BAD_ACCESS (code=EXC_I386_GPFLT)):
cell.contentView.layer.sublayers?.forEach { $0.removeFromSuperlayer() }
Any advise?
EDIT:
just to explain how the sections are expanded, i will add the following:
protocol ExpandableHeaderViewDelegate {
func toggleSection(header: ExpandableHeaderView, section: Int)
}
class ExpandableHeaderView: UITableViewHeaderFooterView {
var delegate: ExpandableHeaderViewDelegate?
var section: Int!
override init(reuseIdentifier: String?) {
super.init(reuseIdentifier: reuseIdentifier)
self.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(selectHeaderAction)))
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
#objc func selectHeaderAction(gestureRecognizer: UITapGestureRecognizer) {
let cell = gestureRecognizer.view as! ExpandableHeaderView
delegate?.toggleSection(header: self, section: cell.section)
}
func toggleSection(header: ExpandableHeaderView, section: Int) {
tableView.beginUpdates()
tableView.endUpdates()
}
}
My question was solved by [Knight0fDragon].
extension UIView
{
func clearSubviews()
{
for subview in self.subviews as! [UIView] {
subview.removeFromSuperview();
}
}
}
and then
cell.contentView.clearSubviews()
Thanks for all kind people for their support.
If the problem is just for mismatch of cell data then try using
override func prepareForReuse() {
super.prepareForReuse()
self.label.text = ""
}
Declare the UILabel in the cell's class with null value instead of declaring it in cellForRowAt
Try this inside cellForRowAt:
if tableView.rectForRow(at: indexPath).height == 0.0 {
return UITableViewCell()
}
It should be above all other code.
Try (call it before adding new label)
cell.contentView.subviews.removeAll()
instead of
cell.contentView.layer.sublayers?.forEach { $0.removeFromSuperlayer() }
Hello I'm in trouble with making UITableview. I made cell as nib file and want to display the cell in the UITableView. But nib file doesn't show in the UItableview when I start the app. I don't know how to figure this out. the source is below
import UIKit
class DownLoadPlayViewController: UIViewController,UITableViewDataSource,UITableViewDelegate {
#IBOutlet var tableview: UITableView!
#IBOutlet var totalNumSizeInfo:UILabel!
let cellID:String = "DownLoadPlayViewControllerCell"
var downloadedContents: [Dictionary<String,String>] = []
var showContents: Dictionary<String,String> = [:]
override func viewDidLoad() {
super.viewDidLoad()
self.tableview.delegate = self
self.tableview.dataSource = self
self.tableview.registerClass(DownLoadPlayViewControllerCell.classForCoder(), forCellReuseIdentifier: "DownLoadPlayViewControllerCell")
// self.tableview.registerClass(DownLoadPlayViewControllerCell.self, forCellReuseIdentifier: "DownLoadPlayViewControllerCell")
// self.tableview.registerNib(UINib(nibName: "DownLoadPlayViewControllerCell", bundle: nil), forCellReuseIdentifier: "DownLoadPlayViewControllerCell")
downloadedContents = getDownloadInformation()!;
totalNumSizeInfo.text = "초기화 상태"
// let contentInfo : Dictionary<String,String> = self.downloadedContents[0]
// print(contentInfo["contentTitle"])
// print(contentInfo["viewDate"])
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
/*Podlist에 있는 다운로드 파일정보를 가져온다. */
func getDownloadInformation() -> [Dictionary<String,String>]?{
var returnValue : [Dictionary<String,String>]? =
NSUserDefaults.standardUserDefaults().objectForKey("downloadedContents") as? [Dictionary<String,String>]
if((returnValue?.isEmpty) == true){
returnValue = nil
}
return returnValue
}
// func numberOfSectionsInTableView(tableView: UITableView) -> Int {
// return 1
// }
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
return downloadedContents.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
// let cell = tableView.dequeueReusableCellWithIdentifier("DownLoadPlayViewControllerCell", forIndexPath: indexPath) as! DownLoadPlayViewControllerCell
let cell = tableView.dequeueReusableCellWithIdentifier("DownLoadPlayViewControllerCell") as! DownLoadPlayViewControllerCell
let contentInfo : Dictionary<String,String> = self.downloadedContents[indexPath.row]
cell.titleLabel?.text = contentInfo["contentTitle"]
cell.dateLabel?.text = contentInfo["viewDate"]
return cell;
}
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath)
{
let contentInfo : Dictionary<String,String> = self.downloadedContents[indexPath.row]
print(contentInfo["downLoadURL"])
}
//MARK: ButtonClickArea
#IBAction func closeButtonClick(sender: AnyObject) {
self.dismissViewControllerAnimated(true, completion: nil)
}
}
You need reloadData for your tableview after run the command downloadedContents = getDownloadInformation()!. Just run tableview.reloadData() like that:
downloadedContents = getDownloadInformation()!;
tableview.reloadData() //---------> add new like here
totalNumSizeInfo.text = "초기화 상태"
Here is how to use a custom created cell.
Note: I am not using StoryBoard and I have created the cell in a nib.
CustoMCell Class Code:
import UIKit
class ActivityTableViewCell: UITableViewCell {
// MARK: - Constants & variable
// your outlets if any
// MARK: - UITableViewCell methods
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
override func setSelected(selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
// MARK: - helper methods
class func cellForTableView(tableView: UITableView, atIndexPath indexPath: NSIndexPath) -> ActivityTableViewCell {
let kActivityTableViewCellIdentifier = "kActivityTableViewCellIdentifier"
tableView.registerNib(UINib(nibName: "ActivityTableViewCell", bundle: NSBundle.mainBundle()), forCellReuseIdentifier: kActivityTableViewCellIdentifier)
let cell = tableView.dequeueReusableCellWithIdentifier(kActivityTableViewCellIdentifier, forIndexPath: indexPath) as! ActivityTableViewCell
return cell
}
}
And this is how I use it in my TableView
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = ActivityTableViewCell.cellForTableView(tableView, atIndexPath: indexPath)
// access your cell properties here
return cell
}
I solve the problem by modifying the tablecellController like this
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)!
self.alpha = 0
UIView.animateWithDuration(0.2, delay: 0, options: .CurveEaseIn, animations: {
self.alpha = 1
}, completion: { finished in
})
}
I have a custom cell class with a couple of IBOutlets. I have added the class to the storyboard. I have connected all my outlets. my cellForRowAtIndexPath function looks like this:
override func tableView(tableView: UITableView!, cellForRowAtIndexPath indexPath: NSIndexPath!) -> UITableViewCell! {
let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as SwipeableCell
cell.mainTextLabel.text = self.venueService.mainCategoriesArray()[indexPath.row]
return cell
}
Here is my custom cell class:
class SwipeableCell: UITableViewCell {
#IBOutlet var option1: UIButton
#IBOutlet var option2: UIButton
#IBOutlet var topLayerView : UIView
#IBOutlet var mainTextLabel : UILabel
#IBOutlet var categoryIcon : UIImageView
init(style: UITableViewCellStyle, reuseIdentifier: String!) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
}
}
When I run the app, all my cell are empty. I have logged out self.venueService.mainCategoriesArray() and it contains all the correct strings. I have also tried putting an actual string equal to the label, and that produces the same result.
What am I missing? Any help is appreciated.
Custom Table View Cell Example
Tested with Xcode 9 (edit also tested on 11 / 12 Beta 2) and Swift 4 (edit: also tested on 5.2)
The asker of the original question has solved their problem. I am adding this answer as a mini self contained example project for others who are trying to do the same thing.
The finished project should look like this:
Create a new project
It can be just a Single View Application.
Add the code
Add a new Swift file to your project. Name it MyCustomCell.swift. This class will hold the outlets for the views that you add to your cell in the storyboard.
import UIKit
class MyCustomCell: UITableViewCell {
#IBOutlet weak var myView: UIView!
#IBOutlet weak var myCellLabel: UILabel!
}
We will connect these outlets later.
Open ViewController.swift and make sure you have the following content:
import UIKit
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
// These strings will be the data for the table view cells
let animals: [String] = ["Horse", "Cow", "Camel", "Sheep", "Goat"]
// These are the colors of the square views in our table view cells.
// In a real project you might use UIImages.
let colors = [UIColor.blue, UIColor.yellow, UIColor.magenta, UIColor.red, UIColor.brown]
// Don't forget to enter this in IB also
let cellReuseIdentifier = "cell"
#IBOutlet var tableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
tableView.delegate = self
tableView.dataSource = self
}
// number of rows in table view
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return self.animals.count
}
// create a cell for each table view row
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell:MyCustomCell = self.tableView.dequeueReusableCell(withIdentifier: cellReuseIdentifier) as! MyCustomCell
cell.myView.backgroundColor = self.colors[indexPath.row]
cell.myCellLabel.text = self.animals[indexPath.row]
return cell
}
// method to run when table view cell is tapped
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print("You tapped cell number \(indexPath.row).")
}
}
Setup the storyboard
Add a Table View to your view controller and use auto layout to pin it to the four sides of the View Controller. Then drag a Table View Cell onto the Table View. And then drag a View and a Label onto the Prototype cell. (You may need to select the Table View Cell and manually set the Row Height to something taller in the Size inspector so that you have more room to work with.) Use auto layout to fix the View and the Label how you want them arranged within the content view of the Table View Cell. For example, I made my View be 100x100.
Other IB settings
Custom class name and Identifier
Select the Table View Cell and set the custom class to be MyCustomCell (the name of the class in the Swift file we added). Also set the Identifier to be cell (the same string that we used for the cellReuseIdentifier in the code above.
Hook Up the Outlets
Control drag from the Table View in the storyboard to the tableView variable in the ViewController code.
Do the same for the View and the Label in your Prototype cell to the myView and myCellLabel variables in the MyCustomCell class.
Finished
That's it. You should be able to run your project now.
Notes
The colored views that I used here could be replaced with anything. An obvious example would be a UIImageView.
If you are just trying to get a TableView to work, see this even more basic example.
If you need a Table View with variable cell heights, see this example.
This is for who are working custom cell with .xib
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell{
let identifier = "Custom"
var cell: CustomCell! = tableView.dequeueReusableCellWithIdentifier(identifier) as? CustomCel
if cell == nil {
tableView.registerNib(UINib(nibName: "CustomCell", bundle: nil), forCellReuseIdentifier: identifier)
cell =tableView.dequeueReusableCellWithIdentifier(identifier) as? CustomCell
}return cell}
I have the same problem.
Generally what I did is the same as you.
class dynamicCell: UITableViewCell {
#IBOutlet var testLabel : UILabel
init(style: UITableViewCellStyle, reuseIdentifier: String) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
}
override func awakeFromNib() {
super.awakeFromNib()
}
override func setSelected(selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
}
}
and in the uitableviewcell method:
func tableView(tableView: UITableView!, cellForRowAtIndexPath indexPath: NSIndexPath!) -> UITableViewCell! {
var cell :dynamicCell = tableView.dequeueReusableCellWithIdentifier("cell") as dynamicCell
cell.testLabel.text = "so sad"
println(cell.testLabel)
return cell;
}
and yeah the tableview shows nothing! But guess what, it actually shows something...because the log I get from the println(cell.testLabel) shows that all the Labels are actually displayed out.
BUT! their Frames is strange, which have something like this:
frame = (0 -21; 42 21);
so it has a (0,-21) as (x,y), so that means the label just appears at somewhere outside the bound of the cell.
so I try to add adjust the frame manually like this:
cell.testLabel.frame = CGRectMake(10, 10, 42, 21)
and sadly, it doesn't work.
---------------update after 10 min -----------------
I DID IT.
so, it seems that the problem comes from the Size Classes.
Click on your .storyboard file and go to the File Inspector Tab
UNCHECK THE Size Classes checkbox
and finally, my "so sad"Label comes out!
Thanks for all the different suggestions, but I finally figured it out. The custom class was set up correctly. All I needed to do, was in the storyboard where I choose the custom class: remove it, and select it again. It doesn't make much sense, but that ended up working for me.
Last Updated Version is with xCode 6.1
class StampInfoTableViewCell: UITableViewCell{
#IBOutlet weak var stampDate: UILabel!
#IBOutlet weak var numberText: UILabel!
override init?(style: UITableViewCellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
}
required init(coder aDecoder: NSCoder) {
//fatalError("init(coder:) has not been implemented")
super.init(coder: aDecoder)
}
override func awakeFromNib() {
super.awakeFromNib()
}
override func setSelected(selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
}
}
Details
Xcode Version 10.2.1 (10E1001), Swift 5
Solution
import UIKit
// MARK: - IdentifiableCell protocol will generate cell identifier based on the class name
protocol Identifiable: class {}
extension Identifiable { static var identifier: String { return "\(self)"} }
// MARK: - Functions which will use a cell class (conforming Identifiable protocol) to `dequeueReusableCell`
extension UITableView {
typealias IdentifiableCell = UITableViewCell & Identifiable
func register<T: IdentifiableCell>(class: T.Type) { register(T.self, forCellReuseIdentifier: T.identifier) }
func register(classes: [Identifiable.Type]) { classes.forEach { register($0.self, forCellReuseIdentifier: $0.identifier) } }
func dequeueReusableCell<T: IdentifiableCell>(aClass: T.Type, initital closure: ((T) -> Void)?) -> UITableViewCell {
guard let cell = dequeueReusableCell(withIdentifier: T.identifier) as? T else { return UITableViewCell() }
closure?(cell)
return cell
}
func dequeueReusableCell<T: IdentifiableCell>(aClass: T.Type, for indexPath: IndexPath, initital closure: ((T) -> Void)?) -> UITableViewCell {
guard let cell = dequeueReusableCell(withIdentifier: T.identifier, for: indexPath) as? T else { return UITableViewCell() }
closure?(cell)
return cell
}
}
extension Array where Element == UITableViewCell.Type {
var onlyIdentifiables: [Identifiable.Type] { return compactMap { $0 as? Identifiable.Type } }
}
Usage
// Define cells classes
class TableViewCell1: UITableViewCell, Identifiable { /*....*/ }
class TableViewCell2: TableViewCell1 { /*....*/ }
// .....
// Register cells
tableView.register(classes: [TableViewCell1.self, TableViewCell2.self]. onlyIdentifiables)
// Create/Reuse cells
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if (indexPath.row % 2) == 0 {
return tableView.dequeueReusableCell(aClass: TableViewCell1.self, for: indexPath) { cell in
// ....
}
} else {
return tableView.dequeueReusableCell(aClass: TableViewCell2.self, for: indexPath) { cell in
// ...
}
}
}
Full Sample
Do not forget to add the solution code here
import UIKit
class ViewController: UIViewController {
private weak var tableView: UITableView?
override func viewDidLoad() {
super.viewDidLoad()
setupTableView()
}
}
// MARK: - Setup(init) subviews
extension ViewController {
private func setupTableView() {
let tableView = UITableView()
view.addSubview(tableView)
self.tableView = tableView
tableView.translatesAutoresizingMaskIntoConstraints = false
tableView.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
tableView.leftAnchor.constraint(equalTo: view.leftAnchor).isActive = true
tableView.rightAnchor.constraint(equalTo: view.rightAnchor).isActive = true
tableView.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
tableView.register(classes: [TableViewCell1.self, TableViewCell2.self, TableViewCell3.self].onlyIdentifiables)
tableView.dataSource = self
}
}
// MARK: - UITableViewDataSource
extension ViewController: UITableViewDataSource {
func numberOfSections(in tableView: UITableView) -> Int { return 1 }
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return 20 }
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
switch (indexPath.row % 3) {
case 0:
return tableView.dequeueReusableCell(aClass: TableViewCell1.self, for: indexPath) { cell in
cell.textLabel?.text = "\(cell.classForCoder)"
}
case 1:
return tableView.dequeueReusableCell(aClass: TableViewCell2.self, for: indexPath) { cell in
cell.textLabel?.text = "\(cell.classForCoder)"
}
default:
return tableView.dequeueReusableCell(aClass: TableViewCell3.self, for: indexPath) { cell in
cell.textLabel?.text = "\(cell.classForCoder)"
}
}
}
}
Results
Uncheck "Size Classes" checkbox works for me as well, but you could also add the missing constraints in the interface builder. Just use the built-in function if you don't want to add the constraints on your own. Using constraints is - in my opinion - the better way because the layout is independent from the device (iPhone or iPad).
It is Purely swift notation an working for me
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
var cellIdentifier:String = "CustomFields"
var cell:CustomCell? = tableView.dequeueReusableCellWithIdentifier(cellIdentifier) as? CustomCell
if (cell == nil)
{
var nib:Array = NSBundle.mainBundle().loadNibNamed("CustomCell", owner: self, options: nil)
cell = nib[0] as? CustomCell
}
return cell!
}
[1] First Design your tableview cell in StoryBoard.
[2] Put below table view delegate method
//MARK: - Tableview Delegate Methods
func numberOfSectionsInTableView(tableView: UITableView) -> Int
{
return 1
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
return <“Your Array”>
}
func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat
{
var totalHeight : CGFloat = <cell name>.<label name>.frame.origin.y
totalHeight += UpdateRowHeight(<cell name>.<label name>, textToAdd: <your array>[indexPath.row])
return totalHeight
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
var cell : <cell name>! = tableView.dequeueReusableCellWithIdentifier(“<cell identifier>”, forIndexPath: indexPath) as! CCell_VideoCall
if(cell == nil)
{
cell = NSBundle.mainBundle().loadNibNamed("<cell identifier>", owner: self, options: nil)[0] as! <cell name>;
}
<cell name>.<label name>.text = <your array>[indexPath.row] as? String
return cell as <cell name>
}
//MARK: - Custom Methods
func UpdateRowHeight ( ViewToAdd : UILabel , textToAdd : AnyObject ) -> CGFloat{
var actualHeight : CGFloat = ViewToAdd.frame.size.height
if let strName : String? = (textToAdd as? String)
where !strName!.isEmpty
{
actualHeight = heightForView1(strName!, font: ViewToAdd.font, width: ViewToAdd.frame.size.width, DesignTimeHeight: actualHeight )
}
return actualHeight
}
Set tag for imageview and label in cell
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
return self.tableData.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
let cell = tableView.dequeueReusableCellWithIdentifier("imagedataCell", forIndexPath: indexPath) as! UITableViewCell
let rowData = self.tableData[indexPath.row] as! NSDictionary
let urlString = rowData["artworkUrl60"] as? String
// Create an NSURL instance from the String URL we get from the API
let imgURL = NSURL(string: urlString!)
// Get the formatted price string for display in the subtitle
let formattedPrice = rowData["formattedPrice"] as? String
// Download an NSData representation of the image at the URL
let imgData = NSData(contentsOfURL: imgURL!)
(cell.contentView.viewWithTag(1) as! UIImageView).image = UIImage(data: imgData!)
(cell.contentView.viewWithTag(2) as! UILabel).text = rowData["trackName"] as? String
return cell
}
OR
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
let cell: UITableViewCell = UITableViewCell(style: UITableViewCellStyle.Default, reuseIdentifier: "imagedataCell")
if let rowData: NSDictionary = self.tableData[indexPath.row] as? NSDictionary,
urlString = rowData["artworkUrl60"] as? String,
imgURL = NSURL(string: urlString),
formattedPrice = rowData["formattedPrice"] as? String,
imgData = NSData(contentsOfURL: imgURL),
trackName = rowData["trackName"] as? String {
cell.detailTextLabel?.text = formattedPrice
cell.imageView?.image = UIImage(data: imgData)
cell.textLabel?.text = trackName
}
return cell
}
see also TableImage loader from github
The actual Apple reference documentation is quite comprehensive
https://developer.apple.com/library/archive/referencelibrary/GettingStarted/DevelopiOSAppsSwift/CreateATableView.html#//apple_ref/doc/uid/TP40015214-CH8-SW2
Scroll down until you see this part