I'm working on an app that scans a barcode and segues into a new view controller after a scan is found. However, if the user clicks the back button (navigation controller, root view controller is a main menu, but is [probably] irrelevant), the view controller will not segue again. So it segues forward to view controller 3 the first time the app runs, but upon hitting "back" and returning to VC 2, it won't segue to VC 3 again. Is there something I'm missing? I do set the handler in viewDidLoad:
self.barcodesHandler = { barcodes in
if(self.handler_flag) {
var barcode = barcodes[0]
println("Barcode found: type=" + barcode.type + " value=" + barcode.stringValue)
self.bcode = barcode.stringValue
self.handler_flag=false
self.performSegueWithIdentifier("push", sender: nil)
}
}
And the segue:
override public func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
let destinationVC = segue.destinationViewController as! SecondViewController
destinationVC.setText = bcode
}
Thanks so much!
self.performSegueWithIdentifier("push", sender: nil)
Instead of nil use self
Related
I am trying to view another view from popover view controller as full view
#IBAction func AddCommentBTN(_ sender: Any) {
performSegue(withIdentifier: "comment", sender: self)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "comment" {
let destination = segue.destination as! CommentViewController
destination.comments = self.comments
destination.myId = self.myId
}
}
when I open it it loads the view as popover view, how to open it as full view
Looks like you are using StoryBoards , here's how you do it
1)Go to the main.storyboard File and select the segue and got to its attributes inspector menu (select segue and press option + command + 5)
2)change the presentation option to fullScreen
And there you go you have fullScreen now , let me know how this went for you
Basically, I have a button in a slide-out menu (which is its own view controller that covers part of the Origin screen, let's call it Menu) that, when pressed, performs a modal segue to another controller, let's say Destination.
Is there any way that upon pressing the button in Menu (to go to Destination), that I can dismiss Menu back to Origin, and THEN segue to Destination?
It sounds silly but it's something that I think I've seen apps do before. In my case, the reason for wanting to do this is that once I press "Done" on Destination, it dismisses that controller back to Menu, when I want it to just dismiss back to Origin. I can't just perform a segue back to Origin from Destination.
Code:
This is how I open the Menu from Origin:
let interactor = Interactor()
#IBAction func openMenu(_ sender: AnyObject) {
performSegue(withIdentifier: "openMenu", sender: nil)
}
#IBAction func edgePanGesture(sender: UIScreenEdgePanGestureRecognizer) {
let translation = sender.translation(in: view)
let progress = MenuHelper.calculateProgress(translationInView: translation, viewBounds: view.bounds, direction: .Right)
MenuHelper.mapGestureStateToInteractor(
gestureState: sender.state,
progress: progress,
interactor: interactor){
self.performSegue(withIdentifier: "openMenu", sender: nil)
}
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if let destinationViewController = segue.destination as? MenuViewController {
destinationViewController.transitioningDelegate = self
destinationViewController.interactor = interactor
destinationViewController.currentRoomID = self.currentRoomID
}
}
This is my prepareForSegue from Menu to Destination currently, nothing fancy:
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
super.prepare(for: segue, sender: sender)
let inviteVC = segue.destination as! InviteVipViewController
inviteVC.currentRoomID = self.currentRoomID
}
And finally to dismiss Destination is just a simple
#IBAction func cancelButtonPressed(_ sender: Any) {
self.dismiss(animated: true, completion: nil)
}
I saw this question which is basically what I'm trying to do but there was no answer unfortunately: Performing segue after dismissing modal swift
Sorry if this sounds confusing, but if anyone knows what I'm talking about and can let me know how I can set up the segues/prepareForSegues to make it work, any input would be appreciated!
Based on a modification to this answer, the following should work:
In your storyboard, remove the segue that is triggered by tapping your menu button and goes to Destination.
Create a new segue that goes from the Origin view controller to Destination view controller. This segue is going to be manually performed.
When your Destination option is selected in Menu, have Menu dismiss itself and then perform the Destination segue on Origin, like this:
// This code goes in Menu, and you should call it when
// the menu button is tapped.
//
// presentingViewController is Origin
weak var pvc = self.presentingViewController
self.dismiss(animated: true) {
// Menu has been dismissed, but before it is destroyed
// it calls performSegue on Origin
pvc?.performSegue(withIdentifier: "openDestination", sender: nil)
}
When Destination is dismissed, you should see Origin, without seeing Menu at all.
I tested this in a sample app where "Menu" was not a slide out, but a full modal view controller, and it worked for me.
EDIT: While troubleshooting with #KingTim, he found that we needed to wire the segue from the UINavigationController, not Origin, to the Destination. This is because Origin is inside a navigation controller. After that discovery, it worked.
If your presenting view is embedded in a navigation controller then you can do this:
weak var pvc:UIViewController! = self.presentingViewController?.childViewControllers[0]
dismiss(animated: true)
{
pvc.performSegue(withIdentifier: "SegueID", sender: nil)
}
Simple solution with presentingViewController
if let destinationVC = self.presentingViewController as? YourViewController {
destinationVC.isBooleanPassed = true
destinationVC.selectedString = "here comes your string"
destinationVC.selectedInteger = 12345
}
dismiss(animated: true, completion: nil)
I'm using a Page View Controller to implement an image carousel in my app. I have a container view in my parent view controller which has an embed segue to the Page View Controller. The problem I'm having is when I need to go off and fetch these images asynchronously and the segue happens before viewDidLoad gets the images.
My prepare for segue:
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "startCarousel" {
let carouselPageViewController = segue.destination as! CarouselPageViewController
carouselPageViewController.images = carouselImages
}
}
in viewDidLoad:
GalleryManager.sharedInstance.getData = {
(data) in
// Assign images to instance property here ...
}
My thinking is that once I get the images that I programmatically start the segue myself. Or if I should be doing this a different way any advice would be much appreciated.
You can do something like, return false in shouldPerformSegue and initiate segue when data is loaded
i.e.
override func shouldPerformSegue(withIdentifier identifier: String, sender: Any?) -> Bool {
if identifier == "startCarousel" {
return (detail != nil)
}
return true
}
Then in viewDidLoad
GalleryManager.sharedInstance.getData = { [weak self]
(data) in
self?.performSegue(withIdentifier: "startCarousel", sender: nil)
}
No, you can't delay an embed segue. If you use an embed segue it fires as soon as the view controller is loaded.
You need to wait until the data loads and then call the setViewControllers(direction:animated:completion) to install the view controllers that you will use to display the data once the data is loaded.
Swift 3, Xcode 8
You can realize in this way:
set a reference to your page view controller in prepareForSegue in your masterViewController:
var myContainerViewController: UIPageViewController?
override func prepare(for segue: UIStoryboardSegue, sender: Any?)
{
if segue.identifier == "embedSegue" {
if let destination = segue.destination as? YourPageViewControllerClass {
self.myContainerViewController = destination
}
}
Define a function in your own pageViewController class:
func someFunction(){
//configure your image or swipe page
}
when you get the images, in your masterViewController call:
self.myContainerViewController?.someFunction()
you can't delay an embed segue.
you try to put button in view controller and then after view load set button click to set image...
Is it possible on iPhone via UISplitViewController to return from the master controller to the detail one? I have tried in master changing displayMode to PrimaryHidden, using showDetailViewController with splitViewController?.viewControllers[0], but nothing was able to show back the detail controller.
I would like to have both controllers without dismissing and reloading, because one includes a map and the second one preferences of map objects.
Lets say you have a button in the master view which when pressed will take you to detail view. Here is an example how that would go
#IBAction func buttonToGoToDetailView(sender: UIButton) {
performSegueWithIdentifier("segue id in storyboard", sender: nil)
}
// prpare for segua to detail view
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
let destination = segue.destinationViewController as? UIViewController
if let dvc = destination as? NameOfTheDetailViewController{
if segue.identifier = "segue id in storyboard" {
//use dvc to pass data to the detail if there is any
}
}
}
I have to write an iOS app that supports both iOS 7 and 8 and in this app I have two view controllers A and B with navigation controllers and a segue between them. When the segue activates, I have to fetch data from the view controller A to the view controller B. My code works perfectly on iOS 8 but not on iOS 7.
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
if segue.identifier == userDataSegue {
let navController = segue.destinationViewController as? UINavigationController
if let userDataTableViewController = navController?.topViewController as? UserDataTableViewController {
userDataTableViewController.userData = user
}
}
}
Do you know why does this happen and how can I fix it? I could "work around" the problem by saving stuff in NSUserDefaults and reading it in the vc B but that would make my code a mess.
I appreciate any help :D
Don't forget to create a public property userData in Second ViewController.
override func prepareForSegue(segue: UIStoryboardSegue!, sender: AnyObject!)
{
if (segue.identifier == "segueTest") {
var svc = segue!.destinationViewController as secondViewController;
svc.userData = user
}
}