Hi I have tableViewController , that contain tableview Cell , in tableViewCell I have another tableViewController and tableViewCell that every cell have one textField and button , when I click on button(in second tableview) I send data to server and its work good , and if I click back button its work correct , but if I first click on button(in second tableview) and then click on backbtn my application crash , I don't know why , please Help me
override func viewDidLoad() {
super.viewDidLoad()
tableview.delegate = self
tableview.datasource = self
backbtn.addTarget(self, action: #selector(backbtn), for: .touchUpInside)
NotificationCenter.default.addObserver(self, selector: #selector(notification1), name: NSNotification.Name(rawValue: "notification1"), object: nil)
}
#objc func backbtn(){
performSegue(withIdentifier: backToMain, sender: self)
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return Request.count
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
let height = childnumber * 40
return CGFloat(unselectedCellHeight+height+150)
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if let cell = tableView.dequeueReusableCell(withIdentifier: "test") as? RequestCategoryTableVC{
var category : Requst?
category = FilteringRequest[indexPath.row]
DispatchQueue.main.async {
cell.updateCell(categoryList: category!)
}
}
return category()
}
second tableview
func updateCell(categoryList : Requst) {
categoryTableRequestchild.dataSource = self
categoryTableRequestchild.delegate = self
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return list.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
return category2()
return Tabaecategory()
}
Related
Similar to tinder, if a user goes down, I don't want them to be able to go back upwards. How do I do this?
I tried the code below, but it keeps running an error: Index out of range.
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return userList.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "tableCell", for: indexPath) as! FeedTableViewCell
cell.collectionView.delegate = self
cell.collectionView.dataSource = self
//reloading the tableview
let artist: UserModel
artist = self.userList[indexPath.row]
cell.nameLabel.text = artist.name
cell.passionLabel.text = artist.passion
cell.collectionView.reloadData()
if indexPath.row == 1 {
userList.removeFirst()
}
return cell
}
Refer below code,
You need to store last scroll Content Offset of tableview, when user scroll down, refer scrollViewDidScroll method.
#IBOutlet weak var tableView: UITableView!
var lastContentOffsetY:CGFloat = 0.0
override func viewDidLoad() {
super.viewDidLoad()
self.tableView.bounces = false
self.tableView.register(UITableViewCell.self, forCellReuseIdentifier: "reuse")
self.tableView.reloadData()
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 50
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "reuse")
return cell!
}
func scrollViewDidScroll(_ scrollView: UIScrollView) {
if(scrollView.contentOffset.y < self.lastContentOffsetY){
self.tableView.setContentOffset(CGPoint(x:scrollView.contentOffset.x, y: self.lastContentOffsetY), animated: false)
}else{
self.lastContentOffsetY = scrollView.contentOffset.y
}
}
I have a tableView like this:
class ViewController: UIViewController {
#IBOutlet var tableView: UITableView!
let names = ["TEXT1", "TEXT2", "TEXT3"]
override func viewDidLoad()
{
super.viewDidLoad()
// Do any additional setup after loading the view.
tableView.delegate = self
tableView.dataSource = self
}
}
extension ViewControllerMeer: UITableViewDelegate {
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: true)
let name = names[indexPath.row]
print("You clicked on \(name)")
}
}
extension ViewControllerMeer: UITableViewDataSource {
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return names.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
cell.textLabel?.text = names[indexPath.row]
let n = names[indexPath.item]
switch n {
case "TEXT1":
print("s1")
case "TEXT2":
print("s2")
case "TEXT3":
print("s3")
default:
break
}
return cell
}
}
It reads the items from the 'let names', So far so good :) I now want to add some actions because now every item will print 'You tapped me'. I figured something out like
override func tableView(_ tableView: UITableView,
didSelectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: true)
if indexPath.row == 0 {
print("cell1")
} else if indexPath.row == 1 {
print("cell2")
} else if indexPath.row == 2 {
print("cell3")
}
}
The only problem is that it generates an error 'Method does not override any method from its superclass'. So I guess this won't work. What would be a good method to do it?
remove the override in front of func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath)
And you can either to a big if statement or switch statement to do something with the names or you can do something like:
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: true)
let name = names[indexPath.row]
print("You clicked on \(name)")
switch indexPath.row {
case 0:
//do something
self.shareApp()
case 1:
//do something else
self.writeReview()
default:
break
}
}
I just copied your codes to show you basically if you really want to override tableview functions
class ViewController: UITableViewController {
#IBOutlet var tableView: UITableView!
let names = ["TEXT1", "TEXT2", "TEXT3"]
override func viewDidLoad() {
super.viewDidLoad()
}
}
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print("You tapped me!")
}
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return names.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
cell.textLabel?.text = names[indexPath.row]
return cell
}
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: true)
let name = names[indexPath.row]
print("You clicked on \(name)")
}
}
There is a tableview cell and there is a more button which is located on the tableview not in the cell so I want that when the project run it show only five user data in the tableview cell and other user data is show when the user click on the more button(which is located out side the cell) how do I achieved this?
Thanks for help
You can find the prototype cell image
//Mark:TableViewDelegate
extension MembersViewController:UITableViewDelegate,UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return imgarray.count
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tblView.dequeueReusableCell(withIdentifier: "membTableCell", for: indexPath) as! membTableCell
cell.profiletabImg.image = imgarray[indexPath.row]
cell.namelbl.text = names[indexPath.row]
cell.positionlbl.text = "Ceo of code with color"
return cell
}
func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
return 40
}
#IBAction func morebutton(sender:UIButton){
}
}
The tableview expands automatically if you add data to the array and call the tableview.reloadData() function.
From the Apple's Doc -
"Call this method to reload all the data that is used to construct the table, including cells, section headers and footers, index arrays, and so on. For efficiency, the table view redisplays only those rows that are visible. It adjusts offsets if the table shrinks as a result of the reload. The table view’s delegate or data source calls this method when it wants the table view to completely reload its data. It should not be called in the methods that insert or delete rows, especially within an animation block implemented with calls to beginUpdates() and endUpdates()."
#IBAction func moreBtnPressed(_ sender: Any) {
tableviewArray.append("Append your array with remaining items")
tableview.reloadData()
}
Return 5 in numberOfRowsInSection method if more button is not tapped.
When more button is tapped reload the tableview and return imgarray.count in numberOfRowsInSection method.
class TableViewController: UITableViewController {
var dataArr = [String]()
var expanded = false
override func viewDidLoad() {
super.viewDidLoad()
dataArr = (1..<25).map({ String($0) })
self.navigationItem.rightBarButtonItem = UIBarButtonItem(title: "\(dataArr.count - 5) more", style: .plain, target: self, action: #selector(morebutton(_:)))
}
#objc func morebutton(_ sender: UIBarButtonItem) {
self.navigationItem.rightBarButtonItem = nil
expanded = true
tableView.reloadData()
}
// MARK: - Table view data source
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if !expanded && !dataArr.isEmpty {
return 5
} else {
return dataArr.count
}
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "reuseIdentifier") ?? UITableViewCell(style: .default, reuseIdentifier: "reuseIdentifier")
cell.textLabel?.text = dataArr[indexPath.row]
return cell
}
}
I have two view controller with tableviewcell and in both of them I can add items.
What I want to implement is that when I add items in the first tableviewcell lets say I add (item one , item two) and press on (item one).
I want to sugue to the second tableviewcell and add data.
BUT I want the data in the second tableviewcell to save separately,
that means, now if I press on (item one) I should see the data that I added
but if I press on (item two) it should be empty and I can add data later.
I have saved the data for the two tableviewcell in coredata.
I don't use segues or coredata in this solution, but the solution will fix what you need to some extent at least.
class vc1: UIViewController, UITableViewDelegate, UITableViewDataSource {
let tableView = UITableView()
let options: [Int] = [1,2]
override func viewDidLoad() {
super.viewDidLoad()
tableView.delegate = self
tableView.dataSource = self
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return options.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
return UITableViewCell()
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let vc = vc2()
//Not sure where to put the setup to be honest
//option 1:
vc.setupTableView(forCell: indexPath.item)
present(vc, animated: true) {
//option 2:
vc.setupTableView(forCell: indexPath.item)
}
}
}
class vc2: UIViewController, UITableViewDelegate, UITableViewDataSource {
let tableView = UITableView()
var selectedCell: Int!
//Having an nested array in an array will solve this custom "page" you are looking for
let results: [[String]] = [["test1", "test2"], ["test3", "test4"]]
override func viewDidLoad() {
super.viewDidLoad()
tableView.delegate = self
tableView.dataSource = self
}
func setupTableView(forCell cell: Int) {
selectedCell = cell
tableView.reloadData()
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return results[selectedCell].count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = UITableViewCell()
cell.textLabel = results[selectedCell][indexPath.item]
return UITableViewCell()
}
}
I am making an tvOS app for the Apple TV but I have some problems with my UITableView.
When I click on a UITableViewCell nothing happens. I am using targetForAction but it doesn't seem to work.
This is my code:
override func viewDidLoad() {
super.viewDidLoad()
self.tableView.dataSource = self
self.tableView.delegate = self
}
let allData = ["Los Angeles","New York","San Fransisco"]
#IBOutlet weak var tableView: UITableView!
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return allData.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = UITableViewCell(style: .Default, reuseIdentifier: nil)
cell.textLabel?.text = "\(allData[indexPath.row])"
cell.targetForAction("buttonClicked:", withSender: self)
return cell
}
func buttonClicked(sender:AnyObject) {
print("button clicked!")
}
I found the solution.
I had to add this function:
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
print("selected cell \(indexPath.row)")
}
Swift 5:
func tableView(_ tableView: UITableView, didSelectRowAtindexPath indexPath: IndexPath) {
print(indexPath.row)
}
Please use the UITableView Delegate method.
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
}