I am trying to grab the information from cell supplied while searching and bring it back to prior view controller. Here is my code:
//variables:
var searching = false
var cityArray = ["New York City, NY", "LA, CA"]
var searchCity = [String()]
//setup
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if searching {
return searchCity.count
} else {
return cityArray.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "CityTableViewCell", for: indexPath) as!
CityTableViewCell
if searching {
cell.cityLabel.text = searchCity[indexPath.row]
} else {
cell.cityLabel.text = cityArray[indexPath.row]
}
return cell
}
//tells what do once selecting the tableviewcell
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if searching {
//This is the problem. I am telling to take the search city IndexPath.row
currentCity = searchCity[indexPath.row]
} else {
currentCity = cityArray[indexPath.row]
}
//currentCity is then used to go back to prev. VC and tell it what city was selected
if let presentingVC = presentingViewController as? DealsViewController {
if presentingVC.city != self.currentCity {
presentingVC.city = self.currentCity
presentingVC.deleteAllDeals()
presentingVC.noDeals = false
presentingVC.cityOutlet.setTitle(self.currentCity,for: .normal)
DispatchQueue.main.async {
presentingVC.getDealInfo {
presentingVC.DealsTableView.reloadData()
presentingVC.DealsTableView.layoutIfNeeded()
}
}
}
}
searchBar.text = currentCity
searching = false
tableView.deselectRow(at: indexPath, animated: true)
self.dismiss(animated: true, completion: nil)
searchBar.resignFirstResponder()
}
//searchBar
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
searchCity = cityArray.filter({$0.prefix(searchText.count) == searchText})
searching = true
reloadData()
}
Unfortunately, if it is in searching mode, the city returned does not change. It is the same as in previous view controller. I am looking to grab the exact indexpath.row from searchCity.
Thanks!
Figured this out:
There was a transcription error
to change it to lowercase:
searchCity = cityArray.filter({$0.lowercased().prefix(searchText.count) ==
searchText.lowercased()})
Thanks!
Related
I am trying to load the updated search results but it doesn't populate the table view.
I used this link https://www.thorntech.com/how-to-search-for-location-using-apples-mapkit/ which belongs to the previous versions but it still works very well except showing the local search results. Please help
class LocationSearchTable : UITableViewController, UISearchResultsUpdating {
var matchingItems:[MKMapItem] = []
var mapView: MKMapView? = nil
}
extension LocationSearchTable {
func updateSearchResults(for searchController: UISearchController) {
guard let MapView = mapView,
let searchBarText = searchController.searchBar.text else { return }
let request = MKLocalSearch.Request()
request.naturalLanguageQuery = searchBarText
request.region = MapView.region
let search = MKLocalSearch(request: request)
search.start { response, _ in
guard let response = response else {
print("No response")
return
}
self.matchingItems = response.mapItems
self.tableView.reloadData()
}
}
}
extension LocationSearchTable {
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return matchingItems.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell")!
let selectedItem = matchingItems[indexPath.row].placemark
cell.textLabel?.text = selectedItem.name
cell.detailTextLabel?.text = ""
return cell
}
}
//use IndexPath rather than NSIndexPath and you need to use
//override
override func tableView(_ tableView: UITableView,
cellForRowAtIndexPath
indexPath: IndexPath) -> UITableViewCell {
let cell =tableView.dequeueReusableCell(withIdentifier:"cell")!
let selectedItem = matchingItems[indexPath.row].placemark
cell.textLabel?.text = selectedItem.name
cell.detailTextLabel?.text = ""
return cell
}
Hope it is not too late to answer you!
It's easier to explain by example. I have original array which is searched and filtered array with searched items. If i found one item after searching and tap on it, i mark it as done (I have todo list), but when i cancel my search, I find that the first element in the original array is marked, not the third item.
I googled some threads and found almost similar problems, but solutions doesn't suit to my problem. For example:
didSelectRowAtIndexPath indexpath after filter UISearchController - Swift
And here some code. Especially at didSelectRowAt I mark the items to done. Does anyone have any ideas?
private var searchBarIsEmpty: Bool {
guard let text = searchController.searchBar.text else { return false }
return text.isEmpty
}
private var isFiltering: Bool {
return searchController.isActive && !searchBarIsEmpty
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if isFiltering {
return filteredTasks?.count ?? 0
}
return manager.tasks.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: Keys.cell.rawValue, for: indexPath) as! ToDoCell
var currentItem: Task
if isFiltering {
currentItem = filteredTasks?[indexPath.row] ?? manager.tasks[indexPath.row]
} else {
currentItem = manager.tasks[indexPath.row]
}
cell.titleLabel.text = currentItem.taskName
cell.descriptionLabel.text = currentItem.description
return cell
}
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: true)
let accessoryType: UITableViewCell.AccessoryType = manager.changeState(at: indexPath.row) ? .checkmark : .none
tableView.cellForRow(at: indexPath)?.accessoryType = accessoryType
}
When you use tableView.dequeueReusableCell, you may get the old cell, so you should update it. You should read doc.
#PGDev already said in comments that you should save checked/unchecked status in your model.
I hope my example will help you.
You can contain state of cells in cell models:
class YourCellModel {
var task: Task
var checked: Bool
init(task: Task, checked: Bool) {
self.task = task
self.checked = checked
}
}
And add it in ToDoCell:
//...
var model: YourCellModel {
didSet {
updateViews()
}
}
func updateViews() {
titleLabel.text = task.taskName
descriptionLabel.text = task.description
if model.checked {
//...
} else {
//....
}
}
And update model here:
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: Keys.cell.rawValue, for: indexPath) as! ToDoCell
// You should contain cell models to remember their states
let model = cellModels[indexPath.row]
cell.model = model
return cell
}
When the user checks a cell, you should save it in your cell model. You can do it in ToDoCell:
func checked() {
model.checked = true
}
Note: If isFiltering is true, it is a different array of cell models.
UPD. I noticed your Task is similar to a cell model. You can save checked status there. But your cell should have access to it.
I need to get textLabel from row in UITableView. But I get nil. I need to get textLabel, because I'm using UISearchBar, if I will try to get data using index, when searching, I will receive incorrect indexes. So , I want to get textLabel.
Please, fix where I'm wrong
When I am typing in searchBar items in TableView change. But index doesn't. For example Food = ["Apple", "Banana", "Coca-Cola"]. If I use searchBar and enter "Banana". Then I click on this , but I get Apple (because this is index - 0). That's why I want to get textLabel
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
//let meal = foods[indexPath.item]
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
let labelContent = cell.textLabel!.text
print(labelContent)
}
UISearchBar
extension FoodViewController: UISearchBarDelegate {
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
searchedFoods = foods.filter({ $0.title.lowercased().prefix(searchText.count) == searchText.lowercased() })
searching = true
tableView.reloadData()
}
func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
searching = false
searchBar.text = ""
tableView.reloadData()
}
}
Never get data from the view, the cell, get it always from the model, the data source.
And never use dequeueReusableCell outside of cellForRowAt. You won't get the cell you expect.
In this case you have to get the data depending on searching
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let labelContent : String
if searching {
labelContent = searchedFoods[indexPath.row].title
} else {
labelContent = foods[indexPath.row].title
}
print(labelContent)
}
And your filter method is horrible. Change it to much more efficient
searchedFoods = foods.filter { $0.title.range(of: searchText, options: [.caseInsensitive, .anchored] != nil) }
Finally I recommend to change textDidChange to cancel searching also if the search text becomes empty and remove the unused items from searchedFoods.
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
if searchText.isEmpty {
searchedFoods.removeAll()
searching = false
} else {
searchedFoods = foods.filter{ $0.title.range(of: searchText, options: [.caseInsensitive, .anchored]) != nil }
searching = true
}
tableView.reloadData()
}
As I have figured out the problem is that you are using indexPath.item that's why you are getting the wrong index please try this
let meal = foods[indexPath.row]
If you want to get a text from the UILabel on tap of cell
confirm UITableViewDelegate
//Access the array that you have used to fill the tableViewCell
print(foods[indexPath.row]) it will print selected row
OR
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let cell = tableView.cellForRow(at: indexPath) as! UITableViewCell
let labelContent = cell.textLabel!.text
print(labelContent)
}
Lets just say instead of getting data from foods (in didSelect method) get it from searched Food. But for that to work properly you should assign searched food with food initially and also when the user clears search bar you should again reset searched food to food data.
Please try like this,
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if searching {
print(searchedFoods[indexPath.row])
} else {
print(foods[indexPath.row])
}
}
Try This
extension FoodViewController: UITableViewDataSource {
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
if searching {
let food = searchedFoods[indexPath.row]
cell.textLabel?.text = food.title
} else {
let food = foods[indexPath.row]
cell.textLabel?.text = food.title
}
return cell
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if searching {
return searchedFoods.count
} else {
return foods.count
}
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if searching {
let meal = searchedFoods[indexPath.row]
let labelContent = meal
print(labelContent)
} else {
let meal = foods[indexPath.row]
let labelContent = meal
print(labelContent)
}
}
I'm trying to accomplish searching for other users only when the user has typed at least 2 words, and only then begin the search in the database (because I don't want to scan the entire database for the users). I had some problems with 2 letter search, but I think I got the code (thanks to user Jay).
However when I run it in the simulator, the console prints name, but nothing shows up in the tableview? (its empty).
Do you know what I have done wrong?
This is my code:
class FollowUsersTableViewController: UIViewController {
#IBOutlet var tableView: UITableView!
private var viewIsHiddenObserver: NSKeyValueObservation?
let searchController = UISearchController(searchResultsController: nil)
var usersArray = [UserModel]()
var filteredUsers = [UserModel]()
var loggedInUser: User?
//
var databaseRef = Database.database().reference()
//usikker på den koden over
override func viewDidLoad() {
super.viewDidLoad()
searchController.searchBar.delegate = self
//large title
self.title = "Discover"
if #available(iOS 11.0, *) {
self.navigationController?.navigationBar.prefersLargeTitles = true
} else {
// Fallback on earlier versions
}
self.tableView?.delegate = self
self.tableView?.dataSource = self
searchController.searchResultsUpdater = self
searchController.dimsBackgroundDuringPresentation = false
self.searchController.delegate = self;
definesPresentationContext = true
tableView.tableHeaderView = searchController.searchBar
}
func searchUsers(text: String) {
if text.count >= 2 {
self.usersArray = [] //clear the array each time
let endingText = text + "\u{f8ff}"
databaseRef.child("profile").queryOrdered(byChild: "username")
.queryStarting(atValue: text)
.queryEnding(atValue: endingText)
.observeSingleEvent(of: .value, with: { snapshot in
for child in snapshot.children {
let childSnap = child as! DataSnapshot
print(childSnap)
let userObj = Mapper<UserModel>().map(JSONObject: childSnap.value!)
userObj?.uid = childSnap.key
if childSnap.key != self.loggedInUser?.uid { //ignore this user
self.usersArray.append(userObj!)
}
}
self.tableView.reloadData()
})
}
} //may need an else statement here to clear the array when there is no text
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let dest = segue.destination as! UserProfileViewController
let obj = sender as! UserModel
let dict = ["uid": obj.uid!, "username": obj.username!, "photoURL": obj.photoURL, "bio": obj.bio]
dest.selectedUser = dict as [String : Any]
}
}
// MARK: - tableview methods
extension FollowUsersTableViewController: UITableViewDataSource, UITableViewDelegate {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return searchController.searchBar.text!.count >= 2 ? filteredUsers.count : 0
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! FollowTableViewCell
let user = filteredUsers[indexPath.row]
cell.title?.text = user.username
if let url = URL(string: user.photoURL ?? "") {
cell.userImage?.sd_setImage(with: url, placeholderImage: #imageLiteral(resourceName: "user_male"), options: .progressiveDownload, completed: nil)
cell.userImage.sd_setIndicatorStyle(.gray)
cell.userImage.sd_showActivityIndicatorView()
}
return cell
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 50
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
self.performSegue(withIdentifier: "user", sender: self.filteredUsers[indexPath.row])
}
}
// MARK: - search methods
extension FollowUsersTableViewController:UISearchResultsUpdating, UISearchControllerDelegate, UISearchBarDelegate {
func updateSearchResults(for searchController: UISearchController) {
searchController.searchResultsController?.view.isHidden = false
self.searchUsers(text: self.searchController.searchBar.text!)
filterContent(searchText: self.searchController.searchBar.text!)
self.tableView.reloadData()
}
func filterContent(searchText:String){
if searchText.count >= 2{
self.filteredUsers = self.usersArray.filter{ user in
return(user.username!.lowercased().contains(searchText.lowercased()))
}
}
}
}
This code is very close, and as the other answer points out you've got two arrays.
But let's really simplify the issue: You only need one array since you are filtering Firebase, not the array.
In other words when a user types into the searchField, you're querying Firebase for results and putting them into an array. That's the same array you should be using as the dataSource for your tableView.
As your code sits, you're filtering Firebase and then filtering those results again which isn't needed.
So at a high level supposed we have four users in our database
Larry
Moe
Monroe
Curly
the user types 'Mo' into the search field which causes your Fire query to execute. It will return two results:
Mo
Monroe
which then gets populated into an array - we'll call it userResultsArray.
then
tableView.reloadData()
which then calls the tableView delegate methods
func tableView(_ tableView: UITableView, numberOfRowsInSection
return userResultsArray.count
and
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath)
get the user from userResultsArray
return the user name
As shown, you only need the single array to store the queried (filtered) results from Firebase.
You have 2 arrays usersArray and filteredUsers
if childSnap.key != self.loggedInUser?.uid { //ignore this user
self.usersArray.append(userObj!)
}
...
self.tableView.reloadData()
so the the above reload has no effect as you always use
let user = filteredUsers[indexPath.row]
in cellForRowAt , in such cases you should have a var like
var isSearching = false
and alter it when you search then in all delegate & dataSource methods
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return isSearching ? filteredUsers.count : usersArray.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! FollowTableViewCell
let user = isSearching ? filteredUsers[indexPath.row] : usersArray[indexPath.row]
.....
}
func searchBarTextDidBeginEditing(_ searchBar: UISearchBar) {
isSearching = true
}
func searchBarTextDidEndEditing(_ searchBar: UISearchBar) {
isSearching = false
}
func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
isSearching = false
}
func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {
isSearching = false
}
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
filteredUsers = usersArray.filter { /* do filter */ }
if(filteredUsers.count == 0){
isSearching = false
} else {
isSearching = true
}
self.tableView.reloadData()
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
self.performSegue(withIdentifier: "user", sender: isSearching ? self.filteredUsers[indexPath.row] : self.usersArray[indexPath.row])
}
My development environment is swift3, xcode8.
I'm making a list app like Apple's message app.
When I select the list in the table view, I go to the detail page (through the seg) and now I want to implement multiple delete functions, but there's a problem. When I edit mode, I can see the selection window, but if I select that selection window, just go to the detail page.
Maybe before going to the detail page through Seg. I think I should make it a multiple choice. What should I do?
Make sure you conform something like below code;
class TableviewController:UITableViewController{
override func viewDidLoad() {
super.viewDidLoad()
var isMultipleSelectionActive = false
var selectedItems: [String: Bool] = [:]
tableView.allowsMultipleSelectionDuringEditing = true
tableView.setEditing(true, animated: false)
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath)
cell.textLabel?.text = "\(indexPath.row)"
return cell
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 10
}
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
let selectedItem = items.objectAtIndex(indexPath.row)
//add to selectedItems
selectedItems[selectedItem] = true
}
func tableView(tableView: UITableView, didDeselectRowAtIndexPath indexPath: NSIndexPath) {
let selectedItem = items.objectAtIndex(indexPath.row)
// remove from selectedItems
selectedItems[selectedItem] = nil
}
func getStatusOfSelectedItems() {
for item in selectedItems {
println(item)
}
}
//You should override shouldPerformSegueWithIdentifier and return false if isMultipleSelectionActive is true
override func shouldPerformSegue(withIdentifier identifier: String?, sender: Any?) -> Bool {
if let identifierName = identifier {
if identifierName == "NameOfYourSegueIdentifier" {
if isMultipleSelectionActive {
return false
}
}
}
return true
}
}
This code used to select the multiple row
class TableViewController: UITableViewController
{
var lastSelectedIndexPath = NSIndexPath(forRow: -1, inSection: 0)
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
let cell = tableView.dequeueReusableCellWithIdentifier("myCell", forIndexPath: indexPath)
// Configure the cell...
cell.textLabel!.text = "row: \(indexPath.row)"
if cell.selected
{
cell.selected = false
if cell.accessoryType == UITableViewCellAccessoryType.None
{
cell.accessoryType = UITableViewCellAccessoryType.Checkmark
}
else
{
cell.accessoryType = UITableViewCellAccessoryType.None
}
}
return cell
}
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath)
{
let cell = tableView.cellForRowAtIndexPath(indexPath)
if cell!.selected
{
cell!.selected = false
if cell!.accessoryType == UITableViewCellAccessoryType.None
{
cell!.accessoryType = UITableViewCellAccessoryType.Checkmark
}
else
{
cell!.accessoryType = UITableViewCellAccessoryType.None
}
}
}