My goal is to retrieve my eventId from my parent view controller to the child controller. But it seems that my child view controller is being instantiated before the parent. How can I get that eventId from my child controller? Thank you
I'm passing data from my EventsMainController to EventsDetails(Parent Controller)
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "eventDetails" {
let DestViewController : EventDetailsViewController = segue.destination as! EventDetailsViewController
DestViewController.eventId = myEvents[index].uuid
}
}
Then in my EventsDetail Controller I have my variable where I can retrieve it. EventsDetails is my parent controller where I have my child controller in it.
var eventId = String()
In my child controller I'm using this to retrieve the id. It's returning nil.
var eventId = String()
override func viewDidAppear(_ animated: Bool) {
print(eventId)
}
When you add a Container View in storyboard it adds a child view controller and a segue from the parent view controller to child view controller.
This segue is performed immediately after the parent view controller is loaded. Pass the data from EventDetails to InvitedController in prepare for segue method
class EventsMainController: UIViewController {
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "EventDetails" {
if let eventDetails = segue.destination as? EventDetails {
eventDetails.eventId = "FromEventsMainController"
}
}
}
}
class EventDetails: UIViewController {
var eventId = String()
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "InvitedController" {
if let invitedController = segue.destination as? InvitedController {
invitedController.eventId = self.eventId
}
}
}
}
class InvitedController: UIViewController {
var eventId = String()
override func viewDidLoad() {
super.viewDidLoad()
print(eventId)//FromEventsMainController
}
}
Related
I'm trying to pass data from one view controller such as the name and trying to display it in the next view controller but I'm not sure how to do it. I'm using this API which is a JSON array to get the data for my app. I've looked all over for the answer to this but everything I try doesn't work. This is the code I'm using to try it right now but it doesn't work, this is in the first view controller
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {`
if segue.identifier == "nextView" {
if let name = sender as? String, let nextView = segue.destination as? ListViewController {
nextView.nameText = name
}
}
}
This is the code in the destination view controller
class ListViewController: UIViewController {
#IBOutlet weak var name: UILabel!
var nameText: String = ""
override func viewDidLoad() {
super.viewDidLoad()
name?.text = nameText
}
}
The var you are trying to set in prepare nameText is a String so you should send it a String and not a [jsonList]
try like this :
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "view" {
if let name = sender as? [jsonList], let nextView = segue.destination as! ListViewController {
nextView.nameText = //change affectation here
}
}
}
This question already has answers here:
Passing data between view controllers
(45 answers)
Closed 3 years ago.
I would like to pass an int data from one view controller to another one.
The problem is that the int data received in the second view controller doesn't match the first view controller's int data.
View controller 1:
import UIKit
class levelsSelector: UIViewController {
var levelSelected: Int = 0
var gameWanted: Int = 0
#IBAction func level1Tapped(_ sender: Any) {
gameWanted = 1
performSegue(withIdentifier: "gameOn", sender: self)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "gameOne" {
let levelsSelector = segue.destination as! game
levelsSelector.finalGame = levelSelected
let levelsSelector2 = segue.destination as! game
levelsSelector2.finalLevel = gameWanted
}
}
}
View controller 2:
import UIKit
class game: UIViewController {
var finalLevel: Int = 0
var finalGame: Int = 0
override func viewDidLoad() {
super.viewDidLoad()
print(finalLevel)
print(finalGame)
}
}
You've made a typo in your segue name
performSegue(withIdentifier: "gameOn", sender: self)
...
if segue.identifier == "gameOne" {
these two identifiers need to match
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if let destination = segue.destination as? game {
destination.finalGame = levelSelected
destination.finalLevel = gameWanted
}
Also, check: your seque identifier on a storyboard should match a string in: perform segue method
I am segueing from a view controller to a tabbarcontroller and I want to pass data. I want to pass "sendAuthor" to the first view controller of the tabbarcontroller.
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "FirstVC" {
let vc = (segue.destination as? UITabBarController)?.viewControllers?.first as? CommentProfileViewController
vc?.sendAuthor = sendAuthor!
vc?.Username.text = sendAuthor!
print(sendAuthor!)
}
}
In order to make sure I am getting the right thing, I included a print statement print(sendAuthor!) and I am getting the correct print statement. I also included a print statement in the destination view controller but the print statement returns nil
var sendAuthor: String?
override func viewDidLoad() {
super.viewDidLoad()
print(self.sendAuthor)
}
Your VC is imbedded in a UINavigationController. You need to take that into account as well:
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "FirstVC" {
guard let tabbar = segue.destination as? UITabBarController,
let navcon = tabbar.viewControllers?.first as? UINavigationController,
let vc = navcon.topViewController as? CommentProfileViewController
else { return }
vc.sendAuthor = sendAuthor!
vc.Username.text = sendAuthor!
print(sendAuthor!)
}
}
I made a popup view controller but now I'm trying to pass the data from the popup to the view controller via prepare function. Let's take a look.
// this is from the pop up view controller
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let toBeMoved :ViewController = segue.destination as! ViewController
toBeMoved.enterVC()
amountEntered.text = "\(runningNumber1)"
}
// and I added a func in my main VC but I can't get the var in the VC
// totalCash is a label to be changed when the amount is entered from the
// pop up vc
func enterVC () {
totalCash.text = "\(amountEntered)"
}
I added enterVC to viewDidLoad.
Try this and see:
class TestVC: UIViewController {
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let toBeMoved :ViewController = segue.destination as! ViewController
toBeMoved.amountEntered = runningNumber1
toBeMoved.enterVC()
}
}
class ViewController: UIViewController {
var amountEntered: Int = 0
func enterVC () {
totalCash.text = "\(amountEntered)"
}
}
or try this also.
class TestVC: UIViewController {
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let toBeMoved :ViewController = segue.destination as! ViewController
toBeMoved.enterVC(amountEntered: runningNumber1)
}
}
class ViewController: UIViewController {
func enterVC (amountEntered: Int) {
totalCash.text = "\(amountEntered)"
}
}
//Turns out I needed to put a guard let in order to make this work also added IBAction in the original view controller like so:
class ViewController : UIViewController {
#IBAction func didUnwindSegue (sender: UIStoryboardSegue){
guard let realVC = sender.source as? ViewController else {
return
}
}
}
class TestVC : UIViewController {
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
guard let realVC = segue.destination as? ViewController else {
return
}
realVC.totalCash.text = runningNumber1
}
}
I have a table view controller. I have to set a value inside this controller. But I guess above code works only for view controller.
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier! == "changeName" {
if let destination = segue.destinationViewController as? NameSettingTableViewController {
println("ok")
}
}
}
It doesn't print "ok" to debug. I think because NameSettingTableViewController is not a view controller. destination variable is returning nil. How can I fix this ?
Storyboard:http://prntscr.com/79846c
You need to get the navigation controller first, then access its topViewController property to get a reference to your NameSettingTableViewController:
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier! == "changeName" {
if let destination = segue.destinationViewController as? UINavigationController {
let destVC = destination.topViewController as! NameSettingTableViewController
// set whatever variables on destVC
println("ok")
}
}
}