I want when scrolling to bottom in UITableView Fetch more date from API based on Page Number
Are use this method
func scrollViewDidScroll(_ scrollView: UIScrollView) {
if (((scrollView.contentOffset.y + scrollView.frame.size.height) > scrollView.contentSize.height ) && ! isLoadingList){
self. isLoadingList = true
self. loadMoreItemsForList()
}
}
or used this method
override func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
// fetch new data if user scroll to the last cell
guard isLoadingIndexPath(indexPath) else { return }
if self.totalItems > orders.count {
fetchNextPage()
}
}
use func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) method to fetch more data while scrolling to bottom.
Related
I use below code for get selected items of tab bar controller. My UITabbar has 7 view controllers(there are 3 items in More tab).
this code work only for 5 tabs but it don`t return selected index of items on More!
import UIKit
class CustomTabbarController: UITabBarController{
override func viewDidLoad() {
super.viewDidLoad()
self.delegate = self
}
override func tabBar(_ tabBar: UITabBar, didSelect item: UITabBarItem) {
print(self.selectedIndex)
}
}
Following code worked for me. I had to redesign moreTableView to follow my app design. Function 'didSelectRowAt' returns what index is selected.
This code is added to 'UITabBarController' class.
var moreTableView: UITableView?
weak var currentTableViewDelegate: UITableViewDelegate?
func customizeMoreTableView() {
moreTableView = moreNavigationController.topViewController?.view as? UITableView
currentTableViewDelegate = moreTableView?.delegate
moreTableView?.delegate = self
moreTableView?.dataSource = self
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return (viewControllers?.count ?? 4) - 4
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let moreCell = UITableViewCell()
let item = viewControllers?[indexPath.row + 4].tabBarItem
moreCell.textLabel?.text = item?.title
moreCell.textLabel?.textColor = .white
moreCell.imageView?.image = item?.image
moreCell.imageView?.tintColor = .white
moreCell.backgroundColor = .black
return moreCell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
currentTableViewDelegate?.tableView!(tableView, didSelectRowAt: indexPath)
}
Get selected item like this :
override func tabBar(_ tabBar: UITabBar, didSelect item: UITabBarItem) {
print(tabBar.items?.index(of: item))
}
I have a tableview with 2 cells. for some reason the cells get resized when I open in simulator. Trying to understand why. I added image of view.
this is the view code. for now i just wish the cells to get created at the height I set in IB
import UIKit
class userMenuViewController: BaseViewController,UITableViewDataSource,UITableViewDelegate {
var surveyNameArr = ["aaa","bbb","ccc"]
public func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
return (surveyNameArr.count)
}
public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
{
let cell = tableView.dequeueReusableCell(withIdentifier: "cell2", for: indexPath) as! PrefCell2TableViewCell
return (cell)
}
public func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath){
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
addSlideMenuButton()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
}
*/
}
this is what i was looking for:
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat
{
return 100.0;//Choose your custom row height
}
How can I use Swip gesture to do "edit" and "delete" action on Each table view cell? Something like the email app! Any suggestion?
func tableView(_ tableView: UITableView, canEditRowAt indexPath:
IndexPath) -> Bool {
// Return NO if you do not want the specified item to be editable.
return true
}
// Override to support editing the table view.
func tableView(_ tableView: UITableView, commitEditingStyle
editingStyle: UITableViewCellEditingStyle, forRowAt indexPath:
IndexPath) {
if editingStyle == .delete {
// Delete the row from the data source
tableView.deleteRows(at: [indexPath], with: .fade)
}
else if editingStyle == .insert {
// Create a new instance of the appropriate class, insert it
into the array, and add a new row to the table view
}
}
I’m trying to capture an event from a button pressed so I can pass it to a table view, its a timer where I can capture the time and pass it to the tableview but I can't seem to be able to capture the event type.
In the example below I can capture the time a goal was scored but I need the words Goal also passing to the tableview
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = UITableViewCell(style: UITableViewCellStyle.value1, reuseIdentifier: "cell")
cell.backgroundColor = self.view.backgroundColor
**cell.textLabel?.text = "Help here to capture the button event"**
cell.detailTextLabel?.text = time[indexPath.row]
return cell
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return time.count
}
#IBAction func goalClicked(_ sender: UIButton) {
let stopWatchString = stopWatch.elapsedTimeSinceStart()
stopwatchLabel.text = stopWatchString
time.insert(stopWatchString, at: 0)
self.tableView.reloadData()
}
Thanks
Sorted it.
var event: String!
then in the tableView
cell.textLabel?.Text = event
Finally in the button function
event = "Goal"
tableView.reloadData()
I have UITableView allow multi selection for the user to select the languages he speaks when select cell and scroll down in the table other cells selected.
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell:UITableViewCell!
cell = tableView.dequeueReusableCell(withIdentifier: "language",for: indexPath)
cell?.textLabel?.text = languageValues[indexPath.row]
}
func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
if let cell = tableView.cellForRow(at: indexPath) {
cell.accessoryType = .none
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if let cell = tableView.cellForRow(at: indexPath) {
cell.accessoryType = .checkmark
}
gif explain the problem
Your problem is that cells get cached and reused. This means that they are a bad place to store state information.
I suggest that your languageValues array should contain objects where each object has a name string and a selected boolean. When someone selects or deselects a cell, change the boolean to match and reload data for the affected cell (or the table).
That way only cellForRowAt indexPath will change the accessoryType value.