I have a problem when put a UITableView into UIView.
I set a delegate and datasource and implement all methods.
This is my UIView Class.
#objc class ChooserView: UIView, UITableViewDelegate, UITableViewDataSource {
#IBOutlet weak var backgroundView: UIView!
#IBOutlet weak var showView: UIView!
#IBOutlet weak var tableView: UITableView!
public class func createChooserView() -> ChooserView {
var view: ChooserView!
view = Bundle.main.loadNibNamed(String(describing: ChooserView.self), owner: self, options: nil)?.first as! ChooserView
_ = MLAutolayouts.fillContainer(UIApplication.shared.keyWindow!.subviews.first!, view: view)
//Register cell nib
view.tableView.register(UINib(nibName: "PhoneCell", bundle: nil), forCellReuseIdentifier: "PhoneCell")
return view
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: String(describing: PhoneCell.self)) as! PhoneCell
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print("TAP...")
}
}
And this is the outles
When run my app. I get this error
-[UIView tableView:numberOfRowsInSection:]: unrecognized selector sent to instance 0x7fded2e772d0
Log img.
Any idea...
Thanks.
Connect IB of dataSource and delegate to ChooserView instead of any other view.
Just right click on your table view and
Follow the attached gif for connecting IB properly :
Firstly you have applied outlets from storyboard and you are specifying in code as well .There is no need of that.Secondly is there any custom class for your table that contains label or button?This issue generally occurs if u have missed any IBoutlet connection with storyboard or specified 2 connection for a same outlet check it once.
Related
Overview
I'm trying to better understand how extensions work.
In my app I have a ViewController. There I put a view of another class. In this custom class I put a bunch of buttons and a table view. I want them to display some text inside of my tableView whenever I press them.
The problem is that I want to edit some of the table view functions in order to better adjust it to my ViewController.
What I know
All I know is based on the apple documentation
What I'm doing
What I'm trying to do, I should say, is to add functionality to a custom view's function after adding an object which is of the type of my custom class to the ViewController.
This is my custom class:
class CustomClass: UIView{
#IBOutlet weak var abtn: UIButton!
#IBOutlet weak var table: UITableView!
func setupTable(){
table.delegate = self
table.dataSource = self
table.register(UITableViewCell.self, forCellReuseIdentifier: "cellId")
table.backgroundColor = UIColor.black.withAlphaComponent(0.1)
}
}
extension CustomClass: UITableViewDelegate, UITableViewDataSource{
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 10
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = table.dequeueReusableCell(withIdentifier: "cellId", for: indexPath)
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print("I want to add stuff here too")
}
//And more stuff that is not useful rn
}
Inside of the ViewController class I have declared a variable of type CustomClass.
#IBOutlet weak var custom: CustomClass!
In my viewDidLoad I call :
custom.setupTable()
What I need to do is creating an extension to edit the tableview that belongs to custom (the variable of type CustomClass that is inside of my ViewController).
I have no clue on how to do that.
I know how to work with extension to expand my code's functionality but I don't know how to use them to edit these other functions.
Question
How do I edit the tableview functions that belong to custom?
Ie. how would I be able to change the number of rows or to change the cell's layout from the class I call the object in?
I hope I was clear enough...
For this specific example...
Add a property to your CustomClass:
class CustomClass: UIView {
// this may be changed by the "calling class"
var numRows: Int = 10
#IBOutlet weak var abtn: UIButton!
#IBOutlet weak var table: UITableView!
func setupTable(){
table.delegate = self
table.dataSource = self
table.register(UITableViewCell.self, forCellReuseIdentifier: "cellId")
table.backgroundColor = UIColor.black.withAlphaComponent(0.1)
}
}
In your extension, use that property:
extension CustomClass: UITableViewDelegate, UITableViewDataSource{
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// don't make this a hard-coded number
//return 10
return numRows
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = table.dequeueReusableCell(withIdentifier: "cellId", for: indexPath)
return cell
}
//And more stuff that is not useful rn
}
Then, in your "calling class", you can change that property:
class ExampleViewController: UIViewController {
let myView = CustomClass()
override func viewDidLoad() {
super.viewDidLoad()
view.addSubview(myView)
// constraints, etc
// change the number of rows in the table in myView
myView.numRows = 20
}
}
More likely, though, you would be doing something like setting / changing the data for the table in your custom class.
Here's an example, along with showing how to use a closure to "call back" to the calling class / controller:
class CustomClass: UIView {
// this may be changed by the "calling class"
var theData: [String] = []
// closure to "call back" to the controller
var callback: ((IndexPath) -> ())?
#IBOutlet weak var abtn: UIButton!
#IBOutlet weak var table: UITableView!
func setupTable(){
table.delegate = self
table.dataSource = self
table.register(UITableViewCell.self, forCellReuseIdentifier: "cellId")
table.backgroundColor = UIColor.black.withAlphaComponent(0.1)
}
}
extension CustomClass: UITableViewDelegate, UITableViewDataSource{
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return theData.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = table.dequeueReusableCell(withIdentifier: "cellId", for: indexPath)
cell.textLabel?.text = theData[indexPath.row]
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
// tell the controller the cell was selected
callback?(indexPath)
}
}
class ExampleViewController: UIViewController {
let myView = CustomClass()
override func viewDidLoad() {
super.viewDidLoad()
view.addSubview(myView)
// constraints, etc
// set the data in CustomClass
myView.theData = [
"First row",
"Second row",
"Third",
"Fourth",
"etc..."
]
myView.callback = { indexPath in
print("CustomClass myView told me \(indexPath) was selected!")
// do what you want
}
}
}
I added cell to my tableView and i want to show image in any cell i added an array of image to my class "MathViewController" and i want show these images in per cell.but no image show in any of cell.Do any one know about my problem? I'm very new to swift if you help me it will be great.
its my class MathTableViewCell to get the image from story board:
import UIKit
class MathTableViewCell: UITableViewCell{
#IBOutlet weak var imageCell: UIImageView!
}
and here is the class MathViewController:
import UIKit
class MathViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
#IBOutlet weak var tableController: UITableView!
let items = ["Calculatorimg" , "ss"]
override func viewDidLoad() {
super.viewDidLoad()
self.tableController.register(UITableViewCell.self, forCellReuseIdentifier: "MathTableViewCell")
tableController.rowHeight = UITableViewAutomaticDimension
tableController.estimatedRowHeight = 44
tableController.delegate = self
tableController.dataSource = self
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return items.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if let cell = tableView.dequeueReusableCell(withIdentifier: "MathTableViewCell", for: indexPath) as? MathTableViewCell{
cell.imageCell.image = UIImage(named: items[indexPath.row])
return cell
}
return UITableViewCell()
}
}
and here is my storyboard as you cell identifier has been set to MathTableViewCell:
storyboard
Part 1: If create new Xib for cell.
Whole code is correct but forgot to register UITableViewCell Nib file into tableView.
Add below code in ViewDidLoad
tableController.register(UINib(nibName: "MathTableViewCell", bundle: nil), forCellReuseIdentifier: "MathTableViewCell")
Part 2: Cross Verify CellReuseIdentifier is correct.
I have a UICollection view that has two custom cells. The UICollectionViewCell custom cells are built using NIB's. Inside one of the UICollectionViewCell NIB's, I have a UITableView. However, the UITableView itself has custom cells. So my question is:
How do I load a custom cell for the UITableView instead a UICollectionViewCell NIB?
import UIKit
class HeaderFooterCollectionViewCell: UICollectionViewCell {
//Tableview
#IBOutlet weak var tableView: UITableView!
//Buttons
#IBOutlet weak var resetButton: UIButton!
#IBOutlet weak var periodButton: UIButton!
#IBOutlet weak var undoButton: UIButton!
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
// Register cell classes
tableView.register(UINib(nibName: "ShotInformationTableViewCell", bundle: nil), forCellReuseIdentifier: "cell")
}
}
extension HeaderFooterCollectionViewCell: UITableViewDataSource {
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! ShotInformationTableViewCell
return cell
}
}
let cell = Bundle.main.loadNibNamed("XIB_File_Name", owner: self, options: nil)?.first as! XIB_Class_Name
In almost all cases , XIB_File_Name == XIB_Class_Name
I want to make a custom UITableViewCell that can have many columns. One will be a UILabel and one will be a UIButton. I want to start this off by saying I only create my IBOutlets by holding the control key and dragging the UI items to my code. So this means all of my IBOutlets are connected properly. My problem is that the UILabel and the UIButton are not visible in any of my cells. The cells are there, but nothing else.
class CustomTableViewCell: UITableViewCell{
#IBOutlet weak var label: UILabel!
#IBOutlet weak var button: UIButton!
}
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource{
var items: [Strings] = ["one", "two", "three"]
#IBOutlet weak var tableView: UITableView!
override func viewDidLoad(){
super.viewDidLoad()
self.tableView.register(CustomTableViewCell.self, forCellReuseIdentifier: "cell")
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int{
return items.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell:CustomTableViewCell = self.tableView.dequeueReusableCell(withIdentifier: "cell")! as! CustomTableViewCell
cell.label?.text = self.items[indexPath.row]
return cell
}
}
I have the UITableView's data source and delegate set to the ViewController, I have the cell reuse id set up properly and both the UILabel and UIButton have constraints set up. I feel like I am missing something.
You must not register the cell – when using prototype cells – but you must reload the table view.
Replace
override func viewDidLoad(){
super.viewDidLoad()
self.tableView.register(CustomTableViewCell.self, forCellReuseIdentifier: "cell")
}
with
override func viewDidLoad(){
super.viewDidLoad()
self.tableView.reloadData()
}
Those are missing:
self.tableView.delegate = self
self.tableview.datasource = self
Hope this helps!
Im using JTAppleCalendar -> https://github.com/patchthecode/JTAppleCalendar Calendar plugin and I want to place ColectionView Cells inside TableView cell , and I want to show there each cell inside added events with title (inside tableview cell) , but when I connecting outlets gives me;
error: Illegal Configuration: The tableView outlet from the ViewController to the UITableView is invalid. Outlets cannot be connected to repeating content.
How can I fix it ?
CellView.swift
import JTAppleCalendar
class CellView: JTAppleCell {
#IBOutlet var selectedView: UIView!
#IBOutlet var dayLabel: UILabel!
#IBOutlet var Label: UILabel!
}
Cell.Swift
import UIKit
class Cell: UITableViewCell {
#IBOutlet weak var label : UILabel!
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
}
ViewController.Swift
#IBOutlet weak var tableView: UITableView!
extension ViewController: UITableViewDelegate, UITableViewDataSource {
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 5
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! Cell
cell.label?.text = String(indexPath.row)
return cell
}
func tableView(_ tableView: UITableView,didSelectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: true)
}
}
My Screen under below;
You need to create custom class of CollectionViewCell and take IBOutlets on it. now you have taken customCell's views IBOutlets in ViewController's class.
OR
Using tag property you can link that view with cell. as below in cellForItemAtIndexPath.
let label:UILabel = cell.viewWithTag(101) as! UILabel // 101 tag need to set in storyboard related view
How to assign tag to view
https://stackoverflow.com/a/31782616/3901620