I have a pageViewController that is called HomeViewController. Inside it I have three views called Overview, Finance and BSC.
On the third screen (BSC) I have a collectionView. How can I push to another screen according to the "didSelectItemAt" method in the collection view?
My Action:
let notificationName = Notification.Name("bscNotification")
NotificationCenter.default.post(name: notificationName, object: nil, userInfo:["id":indicator!])
in HomeViewController (PageViewController):
let bscNotificationName = Notification.Name("bscNotification")
NotificationCenter.default.addObserver(self, selector: #selector(HomeViewController.showBSCInfo(notification:)), name: bscNotificationName, object: nil)
func showBSCInfo(notification:NSNotification){
let vc = UIStoryboard.init(name: "Main", bundle: Bundle.main).instantiateViewController(withIdentifier: "BSCInfoViewController") as! BSCInfoViewController
vc.IdIndicador = notification.userInfo!["id"]! as! String
vc.showBackButton = true
self.navigationController?.pushViewController(vc, animated: true)
}
Related
I'm learning how to make an app with just a code in Swift. I have encountered this problem:
This is action of a button.
#objc func answerAction() {
let story = UIStoryboard(name: "Main", bundle: nil)
let controller = story.instantiateViewController(withIdentifier: "AccountViewController") as! AccountViewController
self.present(controller, animated: true, completion: nil)
}
If I press it, it shows this error:
Thread 1: "Could not find a storyboard named 'Main' in bundle NSBundle </Users/mas/Library/Developer/CoreSimulator/Devices/A3BEC6D0-3AA6-4193-A755-1181DD580576/data/Containers/Bundle/Application/C80D5D36-EBD8-44D4-AF14-B64E2E7E5587/AppForTest.app> (loaded)"
As I understand, the problem is that I have deleted Main.storyboard and app cannot reach it. So how I should declare in a answerAction story constant?
#objc func answerAction() {
let controller = AccountViewController()
self.present(controller, animated: true, completion: nil)
}
i have a VC which on click of button want to open the tabbar VC that is on the first index. I wana open this through present style. My home vc is on the tab bar first index. How can i open that?. My UI looks like that,
The code i tried is this,
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let tabbarVC = storyboard.instantiateViewController(withIdentifier: "MainVC") as! MainVC
if let vcs = tabbarVC.viewControllers,
let nc = vcs.first as? UINavigationController,
self.present(tabbarVC, animated: false, completion: nil)
you can give an id and open directly
let first = storyboard.instantiateViewController(withIdentifier: "firstID")
self.present(first , animated: false, completion: nil)
//
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let tabbarVC = storyboard.instantiateViewController(withIdentifier: "MainVC") as! MainVC
self.present(tabbarVC, animated: false, completion: nil)
This is my Code
#IBAction func backButton(_ sender: UIButton) {
self.dismiss(animated: true, completion: { () -> Void in
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyboard.instantiateViewController(withIdentifier: "RequestItemPackageDetails") as! RequestItemPackageDetails
self.present(vc, animated: true, completion: nil)
})
}
this is not working only dissmising
I dont't understand your questions well. I think you want to present a new ViewController. You can use this:
UIView.animate{duration: 0.5, animations: {
(UIApplication.shared.delegate as! AppDelegate).window!.rootViewController = NextViewController()
}}
Problem is that you are dismissing self and then trying to present a new view controller on that exact same self - but at that moment self is already dismissed. You need to present that new view controller from the parent of the current view controller. I believe the best way is to setup a delegate. So the controller that you showed us and that you want to dismiss will have this:
protocol FirstDelegate: class {
func firstDismiss(_ first: First)
}
class First: UIViewController {
weak var delegate: FirstDelegate?
#IBAction func backButton(_ sender: UIButton) {
// this will tell the delegate to dismiss this contorller and present the other one
delegate?.firstDismiss(self)
}
// rest of the code omitted
}
Next, you will have to setup this in the parent that presents First view controller (here I assume that presentFirst method presents the First view controller):
class ParentViewController: UIViewController, FirstDelegate {
// rest of the code
func presentFirst() {
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let firstVC = storyboard.instantiateViewController(withIdentifier: "First") as! RequestItemPackageDetails
// set delegate to first:
firstVC.delegate = self
self.present(firstVC, animated: true, completion: nil)
}
func firstDismiss(_ first: First) {
first.dismiss(animated: true, completion: { () -> Void in
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyboard.instantiateViewController(withIdentifier: "RequestItemPackageDetails") as! RequestItemPackageDetails
self.present(vc, animated: true, completion: nil)
})
}
}
Not quite sure with your Qns, but try this one out.
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyboard.instantiateViewController(withIdentifier: "RequestItemPackageDetails") as! RequestItemPackageDetails
vc.previousVC = self
self.present(vc, animated: true)
RequestItemPackageDetails.swift
var previousVC : UIViewController!
override viewDidLoad() {
previousVC.dismiss(animated: false, completion: nil)
}
You can dismiss self and then present another view from rootViewController
self.dismiss(animated: true, completion: { () -> Void in
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyboard.instantiateViewController(withIdentifier: "RequestItemPackageDetails") as! RequestItemPackageDetails
let appDelegate = UIApplication.shared.delegate as! AppDelegate
appDelegate.window!.rootViewController?.present(vc, animated: true, completion: nil)
})
When a function is called, I would like SixthViewController to be presented to the user without the user needing to press any buttons. I know how to present another ViewControllerby setting a button to "Show" another ViewController, but how can I programmatically force SixthViewController to present itself once the function is called?
you can present viewcontroller with this way:
let destVC = SixthViewController()
self.present(destVC, animated: true, completion: nil)
or
let storyboard: UIStoryboard = UIStoryboard(name: "storyboardNamehere", bundle: nil)
let destVC = self.storyboard?.instantiateViewController(withIdentifier: "ViewControllerIdentifierhere" as! SixthViewController
self.present(destVC, animated: true, completion: nil)
========================================================================
just write down this function and also called it when u want to push or write down it in any function like func pushViewController and called it self.pushViewController() that's it bro.
let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)
let sixthViewController = storyBoard.instantiateViewController(withIdentifier: "SixthViewController") as! SixthViewController
self.navigationController?.pushViewController(sixthViewController, animated: true)
If you are not using segues but navigation controller try this:
let destinationVC = SixthViewController()
self.navigationController?.pushViewController(destinationVC, animated: true)
If you just want to show it without navigation controller:
let destinationVC = SixthViewController()
self.present(destinationVC, animated: true, completion: nil)
If you are using storyboard:
let storyboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let destVC = self.storyboard?.instantiateViewController(withIdentifier: "SixthViewController" as! SixthViewController
self.present(destVC, animated: true, completion: nil)
I am trying to load a specific ViewController from the app delegate in swift when a user clicks a UILocalNotification. I have figured out that this is called in this function:
func application(application: UIApplication!, didReceiveLocalNotification notification: UILocalNotification!)
But when I try and access one of the open ViewControllers I think it's returning null because my application is crashing. Here is what I am trying:
var rootViewController = self.window!.rootViewController
var storyBoard = rootViewController.storyboard
var setViewController = storyBoard.instantiateViewControllerWithIdentifier("CurrentShows") as ViewController_CurrentShows
rootViewController.navigationController.popToViewController(setViewController, animated: false)
setViewController.reloadData()
It's crashing on the popToViewController line.
You could try:
let rootViewController = self.window!.rootViewController
let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
let setViewController = mainStoryboard.instantiateViewControllerWithIdentifier("CurrentShows") as! DetailViewController
rootViewController?.navigationController?.popToViewController(setViewController, animated: false)
Swift 3:
let mainStoryboard = UIStoryboard(name: "Main", bundle: nil)
let controller = mainStoryboard.instantiateViewController(withIdentifier: "viewController")
self.present(viewController, animated: true, completion: nil)