In my app, I have a UINavigationController that i'm pushing and popping ViewControllers from. At some point, I want to show a VC modally (showing the previous controller "underneath"). I can get it to work by setting up a segue in a storyboard, however I'm in a spot where I need to do it programmatically, and I can't seem to find the right magic incantation to make it work.
I saw a couple of similar questions but they seemed to be showing the UINavigationController modally, not showing one of the VC's on the UINavigationController stack modally.
(I put up a test application here: https://github.com/SuperTango/ModalNavController, and that's where this code and images come from)
The "Manual" code does:
#IBAction func goToVC2Tapped(_ sender: Any) {
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let destinationViewController = storyboard.instantiateViewController(withIdentifier: "VC2ViewController") as! VC2ViewController
destinationViewController.modalPresentationStyle = UIModalPresentationStyle.overCurrentContext
self.navigationController?.modalPresentationStyle = UIModalPresentationStyle.overCurrentContext
self.navigationController?.pushViewController(destinationViewController, animated: true)
}
but it's not working (see the second transition in the gif below).
The segue that works is setup like this:
This gif is from the test app and shows how it works with the segue, but not manually.
Any ideas? Thanks!
To present modally you need to use:
present(destinationViewController, animated: true, completion: { })
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let destinationViewController = storyboard.instantiateViewController(withIdentifier: "YourVC") as! YourVC
destinationViewController.modalPresentationStyle = UIModalPresentationStyle.overCurrentContext
destinationViewController.modalTransitionStyle = .crossDissolve
self.present(destinationViewController, animated: false, completion: nil)
I think this helps show your ViewController in a modal way of presenting. Write the above code under outlet actions or where you want to present your ViewController.
Related
I'm in a storyboard and I need to go to another storyboard by tapping a button. Well, this I've already done, but I need to go back to previous storyboard. Here is my code:
func goContact() {
let storyboard = UIStoryboard(name: "FAQ", bundle: nil)
let vc = storyboard.instantiateViewController(withIdentifier: "ContactViewController")
self.navigationController?.show(vc, sender: nil)
}
By tapping a button on my UITableViewCell (where I have a protocol), this function (goContact) is called and I switch to another storyboard (FAQ). But, how can I go back to main.storyboard?
I've already tried do this too:
func goContact() {
let storyboard = UIStoryboard(name: "FAQ", bundle: nil)
let vc = storyboard.instantiateViewController(withIdentifier: "ContactViewController")
self.navigationController?.show(vc, sender: nil)
// self.navigationController?.pushViewController(vc, animated: true)
// self.present(vc, animated: true, completion: nil)
}
Use only storyboard property , it references to Main storyboard of the app or you can write it like let storyboard = UIStoryboard(name: "Main", bundle: nil)
To go back after push do
self.navigationController?.popViewController(animated: true)
You should push your new view controller onto the navigation controller using push, like in your commented-out code. That will cause the new view controller to have a back button, which will pop it for you without needing any extra code.
My aim is: To show a popUpViewController in my project in which the user can add a "lesson" (adding a tableViewCell to a tableView) and then save it.
So when the user presses a button inside the DetailViewController of a UISplitViewController , the popUpViewController should show.
I also want the pop-up to be shown as fullscreen with just a small window in the middle and the rest should be black with 0.5 alpha, transparent.
My problem is: I can't find out how I have to show the popUp.
What I've tried and my results:
Tried: Showing it with present(Viewcontroller, animated:, completion: )
Result: It shows fullscreen but the other VC isnt visible in the background anymore.
Tried: The following snippet:
let popOverVC = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "popUpVC") as! PopUpViewController
self.addChildViewController(popOverVC)
self.view.addSubview(popOverVC.view)
popOverVC.didMove(toParentViewController: self)
Result: The view isnt fullscreen but only the size of the detail View Controller (doesnt cover the part of the masterViewController on the left.
Thanks for your help.
You might try again with present(Viewcontroller, animated:, completion: )
and using modalPresentationStyle with formSheet eg:
let popOverVC = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "popUpVC") as! PopUpViewController
popOverVC.modalPresentationStyle = .formSheet
self.present(popOverVC, animated: true, completion: nil)
I've just finished a Swift tutorial which does not use Interface Builder. It is all programmatic. Everything looks great but now I have to segue back to the storyboard, I am lost.
I'd like to segue from the "Login" button designed in the Audible tutorial to the next view controller I created in my storyboard called "DashboardVC".
Here is a link to the tutorial and source code. https://www.letsbuildthatapp.com/course_video?id=382
TIA
As is all from code, you don't have segue's; either you have to push a new controller using pushViewController from NavigationController or instantiate a new ViewController, in this case your 'DashboardVC'.
Like this
let viewController = DashboardVC()
viewController.view.backgroundColor = .blueColor() //example
navigationController?.pushViewController(viewController, animated: true)
Or just presenting the controller using this
let vc = DashboardVC()
present(vc, animated: true, completion: nil)
Using Storyboard, should be like this; the view controller identifier have to be set in the storyboard as well
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let viewController = storyboard.instantiateViewController(withIdentifier :"DashboardVC") as! DashboardVC
self.present(viewController, animated: true)
I want to have a button on my navigation bar "Reset" and I would like this to be connected to an IBAction to sort of "restart" the controller.
I have some segues from another controller that changes some aspects of the viewcontroller (that has a collectionview) and I want the user to be able to start over. Does anyone have any suggestions as to how to proceed?
If you embed navigation controller to your view controller then you can use this code:
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyboard.instantiateViewControllerWithIdentifier("ViewController")
let viewcontrollers = self.navigationController.viewControllers
viewcontrollers.removeLast()
viewcontrollers.append(vc)
self.navigationControllers?.setViewControllers(viewcontrollers, animate: true)
You can change rootViewController of your application:
UIApplication.shared.keyWindow?.rootViewController = UIViewController()
This is how I do it in Swift 2.1 with my Home view inside a UINavigationController:
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let homeVC = storyboard.instantiateViewControllerWithIdentifier("HomeViewController")
self.navigationController?.presentViewController(homeVC, animated: false, completion: nil)
self.navigationController?.dismissViewControllerAnimated(false, 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)