My Scenario, I have three ViewControllers, those ViewControllers First, Second, Third. Here, First ViewController UIButton click to present model second ViewController and then Second ViewController UIButton click to present model Third ViewController. I need to Implement the Second ViewController button click to dismiss current ViewController after presenting Third ViewController because once I close Third ViewController I need to show First ViewController. How to Achieve this?
NOTE: I am having NavigationController for Third ViewController also I am using Storyboard.
Here's my code:
#IBAction func ClickThirdVC(_ sender: Any) {
if let VC_Third = self.storyboard?.instantiateViewController(withIdentifier: "thirdviewcontroller") as? ThirdvViewController {
weak var pvc = self.presentingViewController
VC_B.modalTransitionStyle = .crossDissolve
let navController = UINavigationController(rootViewController: VC_B)
self.dismiss(animated: true, completion: {
pvc?.present(navController, animated: true, completion: nil)
})
}
}
You can try to dismiss self after presenting the third UIViewController, in the completion handler of the present function .
secondVC?.present(navController, animated: true) {
self.dismiss(animated: false, completion: nil) //dismiss self after presenting the third.
}
Related
I am presenting a view controller inside the ParentViewController:
let item = getCurrentItem()
let presentViewController = viewController as! TestViewController
presentViewController.id = item.id
presentViewController.dismissController { // my custom delegate to inform the parent vc
self.dismiss(animated: true, completion: nil) // presenting view controller is closing then viewWillAppear will be triggered
}
self.present(presentViewController, animated: true, completion: nil)
But when dismiss is called, the ParentViewController's global arrays and variables are back to their initial values.
class ParentViewController {
// MARK: - Stored Properties
private let refreshControl = UIRefreshControl()
private var items = [String:[Item]]()
private var screenLoaded: Bool = false
// MARK: - Controller Lifecycle
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
// after dismiss is called viewWillAppear gets hit but the "screenLoaded" is always false
if !screenLoaded {
screenLoaded = true
}
// items is initialised as well
}
private func openPopover() {
let item = getCurrentItem()
let presentViewController = viewController as! TestViewController
presentViewController.id = item.id
presentViewController.dismissController { // my custom delegate to inform the parent vc
self.dismiss(animated: true, completion: nil) // presenting view controller is closing then viewWillAppear will be triggered
}
self.present(presentViewController, animated: true, completion: nil)
}
}
How can I keep the parent view controller's original state after the dismiss is called?
After hours of digging Apple's documentations finally I found the following solution and it works for me. Hope it helps someone in the future.
[https://developer.apple.com/documentation/uikit/uimodalpresentationstyle/overcurrentcontext][1]
presentViewController.modalPresentationStyle = .overCurrentContext
Also, if there is a tabbar, the bottom of the child view controller will be under it if you set the presentation style to overCurrentContext. The workaround is to present the child view controller from the window's rootViewController.
sender.view.window?.rootViewController?.present(viewController, animated: true, completion: nil)
Now when the dismiss is called viewWillAppear is not triggered and I can keep the parent view controller's data and it's state.
I'm presenting a navigation controller (detailview) with showDetailViewController(). I want to dismiss it when a button is pressed. How can I dismiss this viewcontroller?
Code I've attempted:
//detailviewcontroller
#objc
func cancel(_ sender: Any) {
print("cancelPressed")
//self.navigationController?.popViewController(animated: true)
//self.navigationController?.dismiss(animated: true, completion: nil)
//self.dismiss(animated: true, completion: nil)
//splitViewController?.dismiss(animated: true, completion: nil)
//splitViewController?.navigationController?.popToRootViewController(animated: true)
//splitViewController?.navigationController?.popViewController(animated: true)
//splitViewController?.navigationController?.dismiss(animated: true, completion: nil)
//navigationController?.popViewController(animated: true)
//navigationController?.dismiss(animated: true, completion: nil)
//self.navigationController?.popToRootViewController(animated: true)
//self.navigationController?.viewControllers.remove(at: 1)
//self.navigationController?.viewControllers.remove(at: 0) - this one removes to blank view
//self.presentingViewController?.dismiss(animated: true, completion: nil)
}
I've tried multiple stackoverflow solutions:
Dismissing a navigation view controller
How to dismiss a view controller in a navigation controller, without dismissing the whole stack
ios swift - dismiss root view controller of navigation controller
Can't dismiss View Controller that's embedded in a Navigation Controller
How to dismiss a navigation controller presented from another navigation controller in iOS 10 and below?
Can't dismiss navigation controller in Swift
Can't dismiss navigation controller in Swift
Dismissing View Controller Doesn't Work While Using Navigation Controller
Dismiss current navigation controller when clicked tab bar
How to dismiss a certain view controller
How I'm presenting the detailviewcontroller:
//masterviewcontroller
// delegation for passing data between controllers
weak var passDelegate: PlaceSelectionDelegate?
func insertNewObject(_ sender: Any) {
if let detailViewController = passDelegate as? DetailViewController {
if let detailNavigationController = detailViewController.navigationController {
detailViewController.delegate = self
splitViewController?.showDetailViewController(detailNavigationController, sender: nil)
}
}
}
Expected results:
dismiss detail viewController on button press.
Actual results:
No dismiss.
Ok, I've been looking for a way of dealing with this showDetailViewController for a while now and although I'm not sure this answers your question, this is how I did it:
I have two controllers, let's call it FirstController and SecondController. They both inherit from UIViewController. When I click a certain navbar button in the FirstController, I use showDetailViewController to show SecondController as a sheet moving upwards, like the "calendars" button in the Calendar app.
In FirstController I implemented 2 functions: one to show the SecondController and one to dismiss it. I call the dismiss action from within the SecondController. It looks like this:
// FirstController
#objc func showSecondView() {
let vc = SecondController()
vc.delegate = self
let nav = UINavigationController(rootViewController:vc)
self.showDetailViewController(nav, sender: self)
}
func closeSecondView() {
self.dismiss(animated: true)
}
As you can see I wrapped my SecondController in a UINavigationController, so it shows the navbar with title and all. This is how the code looks like:
// SecondController
weak var delegate: FirstController!
override func viewDidLoad() {
super.viewDidLoad()
title = "Second"
navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .done, target: self, action: #selector(closeMe))
}
#objc func closeMe() {
delegate.closeSecondView()
}
Notice how I made a property for the FirstController and I use it to dismiss the SecondController. When I presented SecondController I assigned self as delegate, which means I can now call the closeSecondView method from within it.
I am not sure whether it works out of the box with split-view. The documentation seems to suggest that whenever you use it, if the screen is big enough, it behaves differently because UISplitViewController overrides it. It also says there that all view controllers have this method.
Take a look: https://developer.apple.com/documentation/uikit/uiviewcontroller/1621432-showdetailviewcontroller
Give it a go, I hope this helps.
This should work if you simply want to dismiss the navigation controller
navigationController?.dismiss(animated: true, completion: nil)
i wanted to ask, if i got one uitableviewcell, i need to do checking to meet the condition then only perform to different segue to different view, how to do it? Example like:
if subCat[indexPath.row] == ""{
performSegueWithIdentifier("A", sender: self)
}else{
performSegueWithIdentifier("B", sender: self)
}
How to do it? And how should i connect it with segue at the storyboard?
Even you can do by giving storyboard identifier "A" to viewController 1 and "B" to viewController 2 and push you controller if using navigation otherwise simply present the viewcontroller.
if subCat[indexPath.row] == "" {
let viewController1 = storyboard.instantiateViewControllerWithIdentifier("A") as! ViewController1
// if navigation controller used.
self.navigationController?.pushViewController(viewController1, animated: true)
// if navigation controller not used.
// self.presentViewController(viewController1, animated: true, completion: nil)
}else{
let viewController2 = storyboard.instantiateViewControllerWithIdentifier("B") as! ViewController2
// if navigation controller used.
self.navigationController?.pushViewController(viewController2, animated: true)
// if navigation controller not used.
// self.presentViewController(viewController2, animated: true, completion: nil)
}
I have a xib file which I have created a pop up controller on a UIView. This pop up controller animates up when a button is pressed on a View Controller 1. I then have a button on the UIView which when pressed I want to present another View Controller (View Controller 2). code looks like:
class PopUpViewControllerSwift : UIViewController {
#IBAction func goToVC2(sender: UIButton) {
self.removeAnimate()
let VC2: VC2 = self.storyboard?.instantiateViewControllerWithIdentifier("VC2") as VC2
var modalStyle: UIModalTransitionStyle = UIModalTransitionStyle.CoverVertical
VC2.modalTransitionStyle = modalStyle
presentViewController(VC2, animated: true, completion: nil)
}
}
Although thou when the button is pressed it crashes, no error or callbacks or anything. Obviously this would normally work if it was just a regular View Controller but because I am doing it inside a pop Up View which has been animated on top of another View I think that is the problem?
Can anybody help?
thanks
I did this in a UICollectionView didSelectItemAtIndexPath method.
// Register Nib
let newViewController = NewViewController(nibName: "NewViewController", bundle: nil)
// Present View "Modally"
self.present(newViewController, animated: true, completion: nil)
I set the ID of the ViewController to the same as the file name so I would be sure to reference the right ViewController.
Make sure self.storyboard is not nil.
Also confirm that VC2 is one of the ViewController's identity in the storyboard file.
I hope it could help you.
if VC2 is in a storyboard file, try to use following command to get VC2
let storyboard = UIStoryboard(name: "YourStoryboardName(maybe 'Main')", bundle: nil)
let vc2 = storyboard.instantiateViewControllerWithIdentifier("VC2") as VC2
or if VC2 is in a nib file, try to use following command to get VC2
let vc2 = VC2(nibName: "YourNibName", bundle: nil)
It should be like this:
let vc = MyViewController(nibName: "MyViewController", bundle: nil)
present(vc, animated: true, completion: nil)
I've created a popover inside my MainViewController when some button its touched using the UIPopoverPresentationController and set like it's delegate like it's showed in the WWDC 2014, in the following way :
MainViewController.swift
class MainViewController : UIViewController, UIPopoverPresentationControllerDelegate {
#IBAction func showPopover(sender: AnyObject) {
var popoverContent = self.storyboard?.instantiateViewControllerWithIdentifier("PopOverViewController") as UIViewController
popoverContent.modalPresentationStyle = UIModalPresentationStyle.Popover
var popover = popoverContent.popoverPresentationController
popoverContent.preferredContentSize = CGSizeMake(250, 419)
popover!.delegate = self
popover!.sourceView = self.view
popover!.sourceRect = CGRectMake(180,85,0,0)
self.presentViewController(popoverContent, animated: true, completion: nil)
}
}
The popover have a View inside it and when the View it's clicked with a Tap Gesture Recognizer I show LastViewController using a modal segue, the modal segue is created through the Interface Builder, not in code using an action to present the another LastViewController
Once the LastViewController is dismissed and I'm back in the MainViewController the popover remains open.
Inside the PopOverController I only have the default code nothing more.
LastViewController.swift
#IBAction func dismissVIew(sender: AnyObject) {
self.dismissViewControllerAnimated(true, completion: nil)
}
The above code is used to dismiss the LastViewController once the button inside is touched.
Storyboard
How can I dismiss the popover once the another LastViewController it's visible, or before the another LastViewController should be opened?
Thanks in advance
I have already answer same problem over here.
There scenario is different but solution is same
You have to write code for dismiss presented view controller on completion of current view controller.
Write below code on your dismissVIew method of LastViewController.swift
var tmpController :UIViewController! = self.presentingViewController;
self.dismissViewControllerAnimated(false, completion: {()->Void in
println("done");
tmpController.dismissViewControllerAnimated(false, completion: nil);
});
Download link
In your button action on the FinalViewController, have you tried:
#IBAction func dismissMe() {
//this should tell the popover to tell the main view controller to dismiss it.
self.presentingViewController!.presentingViewController!.dismissViewControllerAnimated(false, completion: nil)
}
here is how I would do it.
I usually use lazy initialization for the PopoverViewController and it's ContentViewController
lazy var popoverVC: UIPopoverController = {
let vc = UIPopoverController(contentViewController: self.contentVC)
vc.delegate = self
return vc
}()
lazy var contentVC: UIViewController = {
let vc = self.storyboard?.instantiateViewControllerWithIdentifier("ContentViewController") as UIViewController
vc.modalInPopover = true
return vc
}()
inside my contentViewController I hold a reference to the UIPopoverController.
var popoverVC: UIPopoverController!
then when I show the popover i just assign the popoverController to the contentViewController
#IBAction func showPopover(sender: UIButton) {
contentVC.popoverVC = self.popoverVC
let viewCenterRect = self.view.convertRect(self.view.bounds, toView: self.view)
popoverVC.presentPopoverFromRect(CGRectMake(CGRectGetMidX(viewCenterRect), CGRectGetMidY(viewCenterRect), 1, 1), inView: self.view, permittedArrowDirections: UIPopoverArrowDirection.allZeros, animated: true)
}
finally I dismiss the Popover programmatically inside an #IBAction
#IBAction func dismissPopover(sender: AnyObject) {
popoverVC.dismissPopoverAnimated(true)
}
Inside the viewcontroller you can override viewWillAppear()
Inside of this block dimiss it
override public func viewWillAppear(animated: Bool)
{
super.viewWillAppear(animated)
_viewToDismiss.removeFromSuperView()
}
But the above code assumes you have a reference to the PopOver object, which I don't think is good practice based on how you described the problem.
Rather, why not have the viewcontroller that created the PopOver be responsible for destroying it. Put this in the class that listens for the button touch (which I also assumes creates the PopOver as well)
- (void)viewWillDisappear:(BOOL)animated
{
_popOver.removeFromSuperView()
}
The popover have a View inside it and when the View it's clicked with a Tap Gesture Recognizer I show another ViewController using a modal segue.
As far as I understand from what you say, you should be able to call dismissViewControllerAnimated(_:completion:) from the action associated to your tap gesture recogniser. This will dismiss the popover you presented calling:
self.presentViewController(popoverContent, animated: true, completion: nil)
You can call this method on the popover view controller itself, depending on what is more convenient for you:
The presenting view controller is responsible for dismissing the view controller it presented. If you call this method on the presented view controller itself, it automatically forwards the message to the presenting view controller.
Based on #Jageen answer
Swift 4.2
let tmpController :UIViewController! = self.presentingViewController;
self.dismiss(animated: false, completion: {()->Void in
print("done");
tmpController.dismiss(animated: false, completion: nil);
});