I'm coding a multi-step sign-up flow, but cannot get the cell labels to pass between each viewcontroller.
Here is the code from the first viewController:
class FirstVC: UIViewController, UITableViewDelegate {
#IBOutlet weak var tableview: UITableView!
var userGoalOptions = ["Lose Fat","Gain Muscle", "Be Awesome"]
var selectedGoal: String = ""
override func viewDidLoad() {
super.viewDidLoad()
self.title = "What Is Your Goal?"
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell:UITableViewCell = tableView.dequeueReusableCellWithIdentifier("Cell1")! as UITableViewCell
cell.textLabel?.text = userGoalOptions[indexPath.row]
return cell
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return userGoalOptions.count
}
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
let indexPath = tableView.indexPathForSelectedRow
let currentCell = tableView.cellForRowAtIndexPath(indexPath!) as UITableViewCell!
selectedGoal = currentCell.textLabel!.text!
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if (segue.identifier == "secondSeque") {
let vc = segue.destinationViewController as! SecondVC
vc.userGoal = selectedGoal
}
}
The segue (secondSegue) is connected to the table view cell in Interface Builder
In my destination viewcontroller (vc) I have an empty userGoal variable, but when I try to print the contents it returns nothing.
I know variations of this question have been asked numerous times, but I can't seem to find (or maybe understand) what I'm messing up.
Assuming the segue is connected to the table view cell in Interface Builder the cell is passed as the sender parameter in prepareForSegue
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if (segue.identifier == "secondSeque") {
let selectedIndexPath = tableView.indexPathForCell(sender as! UITableViewCell)!
let vc = segue.destinationViewController as! SecondVC
vc.userGoal = userGoalOptions[selectedIndexPath.row]
}
In this case didSelectRowAtIndexPath is not needed and can be deleted.
Apart from that it is always the better way to retrieve the data from the model (userGoalOptions) than from the view (the table view cell) for example
Do
let indexPath = tableView.indexPathForSelectedRow
selectedGoal = userGoalOptions[indexPath.row]
Do not
let indexPath = tableView.indexPathForSelectedRow
let currentCell = tableView.cellForRowAtIndexPath(indexPath!) as UITableViewCell!
selectedGoal = currentCell.textLabel!.text!
The prepareForSegue Should not be part of the table view function, you have copied it into a place where it is never called. Move it out and place a break point on it to see that it is being called.
Related
I have one table view with many cell.Each cell have one image and one label.And what i need is when ever user press any cell it have to go to detail viewcontroller.And there i need to show the respective image and label name in my detail view controller.How to do that.
I have done all segue.But in my detail view controller i have one image and label.Now how can i show the image and label name - when i select the any cell from my table view ??
import UIKit
class ViewController: UIViewController,UITableViewDelegate,UITableViewDataSource {
#IBOutlet var tableView: UITableView!
var valueToPass:String!
var selectedIndexPath: NSIndexPath = NSIndexPath()
var tableData: [String] = ["Christ Redeemer", "Great Wall of China", "Machu Picchu","Petra","Pyramid at Chichén Itzá","Roman Colosseum","Taj Mahal"]
var arrImageName: [String] = ["ChristRedeemer", "GreatWallOfChina", "MachuPicchu","Petra","PyramidChichenItza","RomanColosseum","TajMahal"]
var tableRate: [String] = ["$120", "$100", "$222","$1000","$500","$900","$2000"]
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
self.tableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: "cell")
}
func numberOfSectionsInTableView(tableView: UITableView) ->Int
{
return 1
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return self.tableData.count;
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell:CustomTableViewCell = self.tableView.dequeueReusableCellWithIdentifier("CustomTableViewCell") as! CustomTableViewCell
cell.imageVW.image = UIImage(named:self.arrImageName[indexPath.row])
cell.lblName.text = self.tableData[indexPath.row]
cell.rateName.text = self.tableRate[indexPath.row]
return cell
}
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
self.selectedIndexPath = indexPath
performSegueWithIdentifier("DetailView", sender: indexPath)
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?){
let indexPath = self.selectedIndexPath
if (segue.identifier == "DetailView") {
var viewController = segue.destinationViewController as! DetailVC
viewController.data = UIImagePNGRepresentation(UIImage(named:self.arrImageName[indexPath.row])!)!
//viewController.name = self.tableData[[indexPath.row]]
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
Here is my detailvc.swift
import UIKit
class DetailVC: UIViewController {
var data: NSData = NSData()
var name: String = String()
#IBOutlet weak var ImgView: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
self.ImgView.image = UIImage(data: data)
//self.detailLabelNamee.text = name
}
}
change your did select with something like this
Declare one gloabal indexPath in ViewContrller like this
var selectedIndexPath: NSIndexPath = NSIndexPath()
Change your didselect like this
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
self.selectedIndexPath = indexPath
self.performSegueWithIdentifier("DetailView", sender: self)
}
Now in prepareForSegue method add this
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?){
let indexPath = self.selectedIndexPath
if (segue.identifier == "DetailView") {
var viewController = segue.destinationViewController as! DetailVC
viewController.data = UIImagePNGRepresentation(UIImage(named:self.arrImageName[indexPath.row]))
viewController.name = self.tableData[indexPath.row]
}
}
Now add two global identifier in DetailVC like below
var data: NSData = NSData()
var name: String = String()
Now assign this data and string to imageview and label in viewdid load
change the viewdidload of detailVC like this
override func viewDidLoad() {
super.viewDidLoad()
self.ImgView.image = UIImage(data: data)
self.detailLabelNamee.text = name
}
Hop this will help.
In your didSelectRowAtIndexPath you can just perform the segue and in prepareForSegue you can get the indexPath with self.tableView.indexPathForSelectedRow. And of course it returns an optional and you have to check it first for safety. I think this is the easiest way.
In your didSelectRowAtIndexPath you can get the index path of the selected row and then you can performSegue and pass index path in sender.
In prepareForSeque , from the index path , you can get the image , tableData and tableRate . Which you can pass to detail view . Something like below
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
performSegueWithIdentifier("DetailView", sender: indexPath)
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?){
let selectedIndexPath = sender as! NSIndexPath
if (segue.identifier == "DetailView") {
var viewController = segue.destinationViewController as! DetailVC
viewController . setValues(tableData:tableData[selectedIndexPath] , rate: tableRate[selectedIndexPath] , imageName:arrImageName[selectedIndexPath])
}
class DetailVC: UIViewController {
var imageName:String!
var tableData:String!
var tableRate:String!
func setValues(tableData:String , rate:String , imageName:String){
imageName = tableData
tableRate = rate
imageName = imageName
}
or
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?){
let selectedIndexPath = sender as! NSIndexPath
if (segue.identifier == "DetailView") {
var viewController = segue.destinationViewController as! DetailVC
viewController.imageName = self.arrImageName[selectedIndexPath.row]
viewController.tableData = self.tableData[selectedIndexPath.row]
viewController.tableRate = self.tableRate[selectedIndexPath.row]
}
You can declare a variable for store indexpath in that .
var selectedItemIndex = Int()
on click of cell write below lines in didselectowatndexaPath
override func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
selectedItemIndex = indexPath.row
self .performSegueWithIdentifier(“YourViewController”, sender: nil)
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
let yourVC = segue.destinationViewController as! YourViewController
yourVC.text = tableData[selectedItemIndex]
yourVC.image = UIImage(named:arrImageName[selectedItemIndex])
}
You are almost there! The line:
performSegueWithIdentifier("DetailView", sender: self)
needs changing. 'self' is passing a reference of the current view controller to the prepareForSegue method. If you change 'self' to 'indexPath', then prepareForSegue will see the cell index path in the 'sender' object and you take what you want from that.
You could do something like:
if (segue.identifier == "yourSegueIdentifer") {
var viewController = segue.destinationViewController as! DetailVC
let indexPath = sender as! NSIndexPath
viewController.passedImageName = self.arrImageName[indexPath.row]
viewController.passedData = self.tableData[indexPath.row]
viewController.passedRate = self.tableRate[indexPath.row]
and in DetailVC:
class DetailVC: UIViewController {
var passedImageName:String!
var passedData:String!
var passedRate:String!
I have two viewControllers.First one is a tableViewController and second one is a webViewController.I want to pass data from 1st vc to 2nd vc using segue. For this reason i wants the value of "chosenCellIndex" from override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) to prepareForSegue method. But i can not access the chosenCellIndex value from prepareForSegue method. Please help.
class NewsTableViewController: UITableViewController {
#IBOutlet var Alphacell: UITableView!
var chosenCellIndex = 0
//var temp = 0
var newspaper = ["A","B","C"]
override func viewDidLoad() {
super.viewDidLoad()
}
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return newspaper.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Alphacell", forIndexPath: indexPath) as UITableViewCell
cell.textLabel?.text = newspaper[indexPath.row]
// Alphacell.tag = indexPath.row
//Alphacell.addTarget(self, action: "buttonClicked:",forControlEvents: UIControlEvents.TouchUpInside)
return cell
}
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
chosenCellIndex = indexPath.row
//println(chosenCellIndex)
// Start segue with index of cell clicked
//self.performSegueWithIdentifier("Alphacell", sender: self)
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
let secondViewController = segue.destinationViewController as WebViewController
secondViewController.receivedCellIndex = chosenCellIndex
println(chosenCellIndex)
}
}
In order to get chosen cell index you need to get indexpath for selected row, then you need to get section or row index from indexpath.
See the below code for getting row index
let indexPath = tableName.indexPathForSelectedRow
let section = indexPath?.section
let row = indexPath?.row
Make sure you have set the identifier on the segue in storyboard then do:
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "someIdentifier"{
let secondViewController = segue.destinationViewController as? WebViewController
//Also, make sure this is the name of the ViewController you are perfoming the segue to.
secondViewController.receivedCellIndex = chosenCellIndex
print(chosenCellIndex)
}
}
Also, what version of Xcode and Swift are you using? println() is now just print().
best way to do that is from did select row function, that example
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
let objects = newspaper[indexPath.row]
let vc = storyboard.instantiateViewControllerWithIdentifier("someViewController") as! UIViewController
vc.someString = objects.title
self.presentViewController(vc, animated: true, completion: nil)
}
and prepareForSegue use this code :
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
let path = self.tableView.indexPathForSelectedRow()!
segue.destinationViewController.detail = self.detailForIndexPath(path)
}
From the main controller that I have integrated collection view, I want to pass selected cell index path to another view controller (detail view)
so I can use it for updating a specific record.
I have the following working prepareForSegue
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "RecipeDetailVC" {
let detailVC = segue.destinationViewController as? RecipeDetailVC
if let recipeCell = sender as? Recipe {
detailVC!.recipe = recipeCell
}
}
}
And I've tried including let indexPath = collection.indexPathForCell(sender as! UICollectionViewCell) but I get Could not cast value of type 'xxx.Recipe' (0x7fae7580c950) to 'UICollectionViewCell' at runtime.
I also have performSegueWithIdentifier("RecipeDetailVC", sender: recipeCell) and I wonder if I can use this to pass the selected cell's index path but not sure I can add this index to the sender.
I am not clear about the hierarchy of your collectionViewCell. But I think the sender maybe not a cell. Try to use
let indexPath = collection.indexPathForCell(sender.superView as! UICollectionViewCell)
or
let indexPath = collection.indexPathForCell(sender.superView!.superView as! UICollectionViewCell)
That may work.
I've wrote up a quick example to show you, it uses a tableView but the concept is the same:
class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
var things = [1,2,3,4,5,6,7,8] // These can be anything...
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = UITableViewCell()
let objectForCell = self.things[indexPath.row] // Regular stuff
return cell
}
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
let objectAtIndex = self.things[indexPath.row]
let indexOfObject = indexPath.row
self.performSegueWithIdentifier("next", sender: indexOfObject)
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "next" {
// On this View Controller make an Index property, like var index
let nextVC = segue.destinationViewController as! UIViewController
nextVC.index = sender as! Int
}
}
}
Here you can see you get the actual object itself and use it as the sender in the perform segue method. You can access it in prepareForSegue and assign it directly to a property on the destination view controller.
I have a tableview with a bunch of concerts, and when x cell is clicked, I want the artist of that concert to populate the new tableView. Below is the code for the first view controller (the view controller with all the concerts).
class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
#IBOutlet weak var tableView1: UITableView!
var arrayOfConcerts: [concert] = [concert]()
override func viewDidLoad()
{
super.viewDidLoad()
self.setUpConcerts()
self.tableView1.rowHeight = 145.0
}
func setUpConcerts()
{
var ACL = concert(imageName: "ACL2015.png")
let Landmark = concert(imageName: "Landmark.png")
let BostonCalling = concert(imageName: "BostonCalling.png")
let Lolla = concert(imageName: "Lolla.png")
arrayOfConcerts.append(ACL)
arrayOfConcerts.append(Landmark)
arrayOfConcerts.append(BostonCalling)
arrayOfConcerts.append(Lolla)
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return arrayOfConcerts.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
let cell = self.tableView1.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as! CustomCell
let concerts = arrayOfConcerts[indexPath.row]
cell.setCell(concerts.imageName)
return cell
}
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
performSegueWithIdentifier("concertartist", sender: self)
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?)
{
}
}
Below is the code for the Artist View Controller (the second
viewcontroller). This tableView should be populated with specific
artists.
How would I go about doing that?
class ArtistConcerts: UIViewController, UITableViewDataSource, UITableViewDelegate {
var arrayOfArtists: [artist] = [artist]()
#IBOutlet weak var tableViewArtists: UITableView!
override func viewDidLoad()
{
super.viewDidLoad()
self.setUpArtists()
}
func setUpArtists()
{
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return arrayOfArtists.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = self.tableViewArtists.dequeueReusableCellWithIdentifier("", forIndexPath: indexPath) as! CustomCell
let artists = arrayOfArtists[indexPath.row]
cell.setCell(artists.imageNameArtist)
return cell
}
}
You need to do this in the prepareForSegue method.
let vc = segue!.destinationViewController as! ArtistConcerts
if let rowSelected = tableView.indexPathForSelectedRow()?.row {
vc.arrayOfArtists = artistsPerforming[0]//this is an array
}
then, set whatever data you need to actually populate the tableView in that new view controller. I am not 100% sure on what you are trying to do though. Does my answer make sense?
you can send data once the cell is pressed to another viewcontroller by using didSelectRowAtIndexPath or prepareForSegue or didSelectRowAtIndexPath + prepareForSegue
let's say you are using prepareForSegue, things you will need
the segue identifier name
cast the destinationController to the controller you want to send the data
the indexPath.row where the cell was selected
then set the variable or variables or data structure that should receive data
Create a segue when you pressed CTRL + Drag from your cell into another viewcontroller
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?)
{
if segue.identifier == "Name_Of_Segue"
{
let destination = segue.destinationViewController as! NAME_Of_ViewController
let indexPath = mytableview.indexPathForSelectedRow!
let data = arrayOfArtists[indexPath.row]
destination.artist = data
}
mytableview is an IBOutlet from your tableview
artist is a variable that is declared in your destination controller
destination.artist = data this line of code is passing data from the specific cell then send it to your destination cell
I have followed multiple tutorials, and have tried many answers on here, but I cannot seem to figure out what the problem is.
Here is my code:
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
println("You selected cell #\(indexPath.row)!")
let indexPath = homeTimelineTableView.indexPathForSelectedRow()
let currentCell = homeTimelineTableView.cellForRowAtIndexPath(indexPath!) as! ProductTableViewCell
productTitle = currentCell.productCellTitleLabel!.text
println("The product title is \(productTitle)")
self.performSegueWithIdentifier("timelineDetail", sender: self)
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
var titleLables: String!
if (segue.identifier == "timelineDetail") {
println("it works thus far!")
let viewController = segue.destinationViewController as! ProductDetailViewController
let selectedRow = homeTimelineTableView.indexPathForSelectedRow()!.row
viewController.titleLabel?.text = productTitle
}else {
println("wtf is wrong with your code?!")
}
}
I do not receive any errors. However, when I go to run my app, my product title still refuses to pass to the viewcontroller.
Any suggestions? Thanks.
At this stage viewController.titleLabel is nil (you are using ?, that's why there is no error)
The correct approach should be:
add var productTitle: String! in ProductDetailViewController
pass productTitle not to UILabel, but to viewController.productTitle
in viewDidLoad of ProductDetailViewController set viewController.titleLabel?.text = self.productTitle
The productTitle variable must be assigned from the currently selected cell in the prepareForSegue method.
Check the code below.
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
var titleLables: String!
if (segue.identifier == "timelineDetail") {
println("it works thus far!")
let viewController = segue.destinationViewController as! ProductDetailViewController
let selectedRow = homeTimelineTableView.indexPathForSelectedRow()!.row
let currentCell = homeTimelineTableView.cellForRowAtIndexPath(indexPath!) as! ProductTableViewCell
productTitle = currentCell.productCellTitleLabel!.text
viewController.titleLabel?.text = productTitle
} else {
println("wtf is wrong with your code?!")
}
}
The problem is most lilely in these two lines:
let indexPath = homeTimelineTableView.indexPathForSelectedRow()
let currentCell = homeTimelineTableView.cellForRowAtIndexPath(indexPath!) as! ProductTableViewCell
First, func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) provides already the selected indexPath. There is no need for let indexPath = ....
Second, don't load the cell's value (which returns nil, if the cell is visible and tableView.visibleCells() brings other issues), but use your data source to get the item at the selected indexPath.
In total it might look like:
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
// `indexPath` comes from the function parameters
let item = model.itemAtIndexPath(indexPath)
// the 'model'-part should be the same like in `cellForRow:indexPath`
// your mission is only to get the item at the path, not the cell
productTitle = item.title
self.performSegueWithIdentifier("timelineDetail", sender: self)
}