I have an array which i show as dequeueReusableCell, I'd like to show an appropriate image next to the cell. My images are the same name like items in array located in Assets.
How do I show an appropriate image in dequeueReusable cell?
My code:
import UIKit
class Nicosia: UIViewController, UITableViewDelegate, UITableViewDataSource {
let nicosiaPlaces = ["Famagusta Gate", "Laiki Geitonia", "Ledra Street","Omeriye Hamam","Cyprus Museum","Venetian Walls","The House of Hatjigeorgakis Kornessios","Byzantine Art Museum","Archbishop's Palace","Liberty Monument","The Faneromeni Church","Nicosia International Conference Center"]
var identities = ["Famagusta Gate", "Laiki Geitonia", "Ledra Street","Omeriye Hamam","Cyprus Museum","Venetian Walls","The House of Hatjigeorgakis Kornessios","Byzantine Art Museum","Archbishop's Palace","Liberty Monument","The Faneromeni Church","Nicosia International Conference Center"]
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return nicosiaPlaces.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell")
let city = nicosiaPlaces [indexPath.row]
cell?.textLabel?.text = city
//cell.imageCellNicosia?.image = UIImage(named: city)
return cell!
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let vcName = identities[indexPath.row]
let viewController = storyboard?.instantiateViewController(withIdentifier: vcName)
self.navigationController?.pushViewController(viewController!, animated: true)
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
}
If you have a custom table cell class cast this
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell") as! MyCellClass
cell.imageCellNicosia?.image = UIImage(named: city)
if not use build in imageView property of UITableViewCell
cell.imageView?.image = UIImage(named: city)
Related
I have a tableView with custom cells and my goal is to be able to click on one and print the number of the current row.
Right now when I click on a cell not happens and I can't understand why.
This is the code:
//MARK: - UITableDataSource
extension ChannelViewController: UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return groupResult.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let group = groupResult[indexPath.row]
let cell = tableView.dequeueReusableCell(withIdentifier: K.cellContactNibName, for: indexPath) as! ContactCell
cell.usernameLabel.text = group.name
cell.messageLabel.text = group.recentMessage
let storage = Storage.storage()
let storageRef = storage.reference()
// Reference to an image file in Firebase Storage
let reference = storageRef.child("imagesFolder/\(group.image)")
// UIImageView in your ViewController
let imageView: UIImageView = cell.uImage
// Placeholder image
let placeholderImage = UIImage(named: "MeAvatar")
// Load the image using SDWebImage
imageView.sd_setImage(with: reference, placeholderImage: placeholderImage)
cell.uImage.image = imageView.image
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print("You selected cell #\(indexPath.row)!")
}
}
and as you can see in the screen the single selection is enabled:
change to
extension ChannelViewController: UITableViewDataSource, UITableViewDelegate
or move the method into another extension conformed to UITableViewDelegate
also, remember to set the tableView's delegate to the ChannelViewController
I am working on a location-based reminder app. I show all reminders that user created on a table view. I have also UISwitch on every cell. I want that UISwitch disables/enables reminders individually, not all notifications. I couldn't figure it out.
extension MainViewController: UITableViewDataSource{
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 100
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return self.items?.count ?? 0
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
//let cell = tableView.dequeueReusableCell(withIdentifier: "itemCell", for: indexPath)
let cell = tableView.dequeueReusableCell(withIdentifier: "itemCell", for: indexPath) as! itemTableViewCell
let item = self.items![indexPath.row]
cell.itemTitle?.text = item.itemName
cell.itemSubTitle?.text = item.itemDescription
//switch
let swicthView = UISwitch(frame: .zero)
swicthView.onTintColor = UIColor (named: "DingerBlue")
swicthView.setOn(true, animated: true)
swicthView.tag = indexPath.row
swicthView.addTarget(self, action: #selector(self.SwitchBtn(_:)), for: .valueChanged)
cell.accessoryView = swicthView
let itemToRemove = self.items![indexPath.row]
let notifToRemove: String = itemToRemove.notifID!
return cell
}
#objc func switchDidChanged(_ sender: UISwitch){
print("Switch value is \(sender.isOn)")
if(sender.isOn){
print("on")
UIApplication.shared.registerForRemoteNotifications()
}
else{
print("Off")
UNUserNotificationCenter.current().removePendingNotificationRequests(withIdentifiers: [notifToRemove])
}
}
}
I believe your code is not working because cells are reused and actions on specific cells should be handled from the cell class rather than from ViewController. Move this code into the UITableViewCell code.
let swicthView = UISwitch(frame: .zero)
swicthView.onTintColor = UIColor (named: "DingerBlue")
swicthView.setOn(true, animated: true)
swicthView.tag = switchViewTag!
swicthView.addTarget(self, action: #selector(self.SwitchBtn(_:)), for: .valueChanged)
#objc func switchDidChanged(_ sender: UISwitch){
print("Switch value is \(sender.isOn)")
if(sender.isOn){
print("on")
UIApplication.shared.registerForRemoteNotifications()
}
else{
print("Off")
UNUserNotificationCenter.current().removePendingNotificationRequests(withIdentifiers: [notifToRemove])
}
}
and add a new property in the UITableViewCell
weak var switchViewTag: Int?
Modify your cellForRowAt delegate method to
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
//let cell = tableView.dequeueReusableCell(withIdentifier: "itemCell", for: indexPath)
let cell = tableView.dequeueReusableCell(withIdentifier: "itemCell", for: indexPath) as! itemTableViewCell
let item = self.items![indexPath.row]
cell.itemTitle?.text = item.itemName
cell.itemSubTitle?.text = item.itemDescription
cell.switchViewTag = indexPath.row
return cell
}
I have a UITableView.
I can select multiple cells make them highlighted.
But, whenever I reload App, the selected and highlighted state disappears.
I think I need to put some codes in 'viewDidAppear' and 'didSelectRowAt'. But I don't have any idea of specific codes.
What do I have to put in this syntax?
class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
tableView.reloadData()
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
}
}
I recommend u add to dataSource item field selected, and in method cellForRowAtindexPath configure by your dataSource items.
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
guard let cellClass = (self.cellClass(for: indexPath) ?? self.cellClasses.first) else { return UITableViewCell() }
let cell = tableView.dequeueReusableCell(withIdentifier: cellClass.identifier, for: indexPath)
if let configurable = cell as? ConfigurableComponent, let object = self.object(at: indexPath) {
let item = self.dataSource[indexPath.row]
configurable.selected = item.selected
}
return cell
}
When call didSelectRowAt, just take item and change selected field, sample:
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let item = self.dataSource[indexPath.row]
item.selected = !item.selected
tableView.reloadData()
}
below code supposed to call usernames from an array and user able to tap on the desired username. call to that array is a success and I can see the usernames but won't able to tap into it. and it don't even print "didSelectRowAt". appreciate your help. thanks.
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
{
let cell = tableView.dequeueReusableCell(withIdentifier: "cellIdentifier", for: indexPath) as! MentionUserCell
cell.username!.text = autoComplete[indexPath.row]
return cell
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
return autoComplete.count
}
func numberOfSections(in tableView: UITableView) -> Int
{
return 1
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath)
{
let selectedCell: MentionUserCell = tableView.cellForRow(at: indexPath)! as! MentionUserCell
let selectedWord: String = selectedCell.username!.text! + " "
print("didSelectRowAt")
var string: NSString = NSString(string: self.commentTextView.text!)
string = string.replacingCharacters(in: otoCadang.sharedInstance.foundRange, with: selectedWord) as NSString
// change text field value
commentTextView.text = string as? String
// change cursor position
let positionOriginal = commentTextView.beginningOfDocument
if let cursorLocation: UITextPosition = self.commentTextView.position(from: positionOriginal, offset: otoCadang.sharedInstance.foundRange.location + selectedWord.characters.count)
{
self.commentTextView.selectedTextRange = self.commentTextView.textRange(from: cursorLocation, to: cursorLocation)
}
// remove suggestion
self.autoComplete.removeAll()
self.tableView.reloadData()
tableView.isHidden = true
}
Check List
tableview delegate is set properly
tableview selection mode == No Selection, then change to single selection
function name is correct func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
are you using any tap gesture on this view? remove it.
If you are editing UITextView will can't call to `didselectRowAt. Try to get the Your MentionUserCell, IndexPath in UITextView's methods and handle there. Example:
func textViewDidChange(_ textView: UITextView) {
var parentView = textView as UIView
while !(parentView is UITableViewCell) {
parentView = parentView.superview!
}
if let cell: MentionUserCell = parentView as? MentionUserCell {
if let indexPath = self.tableView.indexPath(for: cell) {
let yourIndexPath = indexPath
}
}
//your code
}
Hope it will help you.
When are using two or more cells the didSelectRow method is not working Well. You can use a button in cell.
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cellIdentifierName", for: indexPath) as! MentionUserCell
cell.username!.text = autoComplete[indexPath.row]
let button = cell.viewWithTag(101) as! UIButton
button.cellclick.addTarget(self, action: #selector(functionName(sender:)), for: .touchDown)
return cell
}
Now you get the indexPath:-
func functionName(sender:UIButton) {
let buttonPosition:CGPoint = sender.convert(CGPoint.zero, to:self.tableview)
let indexPath = self.tableview.indexPathForRow(at: buttonPosition)
print(indexPath.row)
}
I have a tableview with 2 prototype cells in a view controller. I want each cell to display data from different arrays.
Below is my code. I can get the tableview to show jobs or schools, but not both. I don't understand how to make the table display cell1 (jobs) and then cell2 (schools) when each cell contains different data sources.
screenshot
Import UIKit
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
let jobs = ["McDonalds", "Hardees", "Taco Bell"]
let schools = ["Univ of CO", "Univ of TX", "Univ of CA"]
override func viewDidLoad() {
super.viewDidLoad()
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return jobs.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "JobsCell", for: indexPath) as! Jobs
let job = jobs[indexPath.row]
cell.jobLbl.text = job
return cell
}
}
Answer: I fixed this by adding numberOfSections function (thanks Robert). Updated code below if anyone else has this question:
import UIKit
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
let jobs = ["McDonalds", "Hardees", "Taco Bell"]
let schools = ["Univ of CO", "Univ of TX", "Univ of CA", "Univ of Camdenton"]
override func viewDidLoad() {
super.viewDidLoad()
}
func numberOfSections(in tableView: UITableView) -> Int {
return 2
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if (section == 0) {
return jobs.count
} else {
return schools.count
}
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if indexPath.section == 0 {
let cell = tableView.dequeueReusableCell(withIdentifier: "JobsCell", for: indexPath) as! Jobs
let job = jobs[indexPath.row]
cell.jobLbl.text = job
return cell
} else {
let cell = tableView.dequeueReusableCell(withIdentifier: "SchoolsCell", for: indexPath) as! Schools
let school = schools[indexPath.row]
cell.schoolLbl.text = school
return cell
}
}
}
It sounds like you want to display one section with cells for jobs followed by a second section with cells for schools. If that's the case, you'll need to set the number of sections to 2, then rewrite your delegate functions to respond appropriately depending on the section number.
So numberOfRowsInSection is going to have to check the section number, then return the number of rows for that specific section. And cellForRowAt will need to check the section, then set up and return either a job or a school cell for the given row.
Here's what that would look like in your example:
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
let jobs = ["McDonalds", "Hardees", "Taco Bell"]
let schools = ["Univ of CO", "Univ of TX", "Univ of CA"]
override func viewDidLoad() {
super.viewDidLoad()
}
func numberOfSections(in tableView: UITableView) -> Int {
return 2
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
switch(section) {
case 0: return jobs.count
default: return schools.count
}
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
switch(indexPath.section) {
case 0:
let cell = tableView.dequeueReusableCell(withIdentifier: "JobsCell", for: indexPath) as! Jobs
let job = jobs[indexPath.row]
cell.jobLbl.text = job
return cell
default:
let cell = tableView.dequeueReusableCell(withIdentifier: "SchoolsCell", for: indexPath) as! Schools
let school = schools[indexPath.row]
cell.schoolLbl.text = school
return cell
}
}
}
And here's the output in the simulator: