This is my segue method. Let's say this method is in ParentViewController.
override fu n c prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "subViewController" {
// Before appears in the screen.
let subViewController = segue.destination as! SubViewController
subViewController.currentMarks = sender as? Int16
}
It is working perfect. Now coming to SubViewController. Here I'm doing some thing and I have a button here. Whenever I click this button it should dismiss SubViewController and needs to open ParentViewController (not opening because it's already opened state only).
Exactly whenever I click button in SubViewController, subViewController just needs to dismiss then automatically ParentViewController will be visible I think (because already opened one only I'm not closed right?).
How to implement like this mechanism? In SubViewController button action I have written this:
self.navigationController?.dismiss(animated: true, completion: {
})
but it didn't work. Can anybody help me please?
If you chose show when you created your segue on stoyboard. Call this in your button click:
self.navigationController?.popViewController(animated: true)
If you chose present modally call this:
self.dismiss(animated: true, completion: nil)
Related
I am making an app where at the begging it check if a value exist in UserDefaults. If not, it opens a window asking the user to choose where to put a Database and save the path in UserDefaults. If the Path is already hear, then the main window opens.
To do this I have two storyboard, the Main containing all the controllers for the main window and the Welcome storyboard containing the welcome screen.
My main window contains a NSToolbar with items. the problem is that if I put my main window controller as initial controller, the toolbar just work fine, but the Welcome screen is never called. So I've remove the "is initial controller" options, but if check the conditions in applicationDidFinishLaunching in appDelegate, when I instantiate the window from here (and everything works, the right window is open for the right condition), the Toolbar never works (the actions for the buttons are never called, I checked with prints).
Here's my code in appDelegate :
func applicationDidFinishLaunching(_ aNotification: Notification) {
let userDefaults = UserDefaults.standard
if userDefaults.string(forKey: "Database Path") == nil {
let storyboard = NSStoryboard(name: "Welcome", bundle: nil)
let initiate = storyboard.instantiateController(withIdentifier: "Welcome") as! WelcomeWindowController
initiate.window?.makeKeyAndOrderFront(self)
} else {
let storyboard = NSStoryboard(name: "Main", bundle: nil)
let initiate = storyboard.instantiateController(withIdentifier: "Main") as! MainWindowController
initiate.window?.makeKeyAndOrderFront(self)
}
}
Is there something I'm missing when I instantiate the main window controller?
I am trying to link together 2 controllers with segue. I have a view controller with 6 button that after the click on a button will show a tableviewcontroller. I made all the link, give the identifier to segue etc.
in the tableviewcontroller there is an array that should show filtered results depending on which button trigger the segue
How should I write the prepareforsegue method?
This is what i am doing
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "chooseBrand" {
if sender?.tag == 1 {
let destinationController = segue.destinationViewController as! SelectionTableViewController
let numberOfCameras = destinationController.Camera.count
}
the problem is that i receive this error message
"Could not cast value of type 'UINavigationController' (0x10a0ef588)
to 'myApp.SelectionTableViewController' (0x108658b90)."
How can I define the content of the tableview in the selectiontableviewcontroller depending on which button is pressed?
Thanks a lot for any kind of help :)
What exactly is the sender here? The error is saying that sender with tag = 1 is not a SelectionTableViewController.
Anyway, what you could do is simply to connect each button to the same action outlet method and the have a generic segue between the two controllers. When you then hit button A, B, C, D, E, or F you simply check their tag(or store them as variables in your controller class) and send whatever you want to the controller. It's important that the segue you have between the controllers is between two controllers and not a segue from each UIButton the other controller. In the example below I assume you store each of the six UIButton as class variables.
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "segueFromFirstToSecond" {
let destinationController = segue.destinationViewController as! SelectionTableViewController
if sender = button1 {
let numberOfCameras = destinationController.Camera.count
} else if sender == button2 {
let numberOfCameras = destinationController.Camera.count
}
}
#IBAction func buttonPressed(sender: AnyObject) {
performSegueWithIdentifier(segueProfileToPul, sender: sender)
}
Connect all buttons to the buttonPressed(). I don't think this line let numberOfCameras = destinationController.Camera.countworks since the SelectionTableViewController is not instantiated yet and thus has no values in its variables (I think). What you are looking for are probably setting this value so destinationController.Camera.count = someValue. Maybe I'm wrong though.
Edit
I uploaded a test project showing what I mean. Pay attention to the connections I've made in storyboard. Download here
I have created a new OS X Cocoa Application using the standard Xcode Swift template (using StoryBoards).
I have implemented an IBAction in AppDelegate.swift to handle when the users selects "Open..." from the "File" menu. If the chosen file is a valid image file, I create an NSImage which I then want to display in the view of ViewController.
#IBAction func openFile(sender: NSMenuItem) {
var openPanel = NSOpenPanel()
openPanel.beginWithCompletionHandler { (result :Int) -> Void in
if result == NSFileHandlingPanelOKButton {
if let imageURL = openPanel.URL {
let image = NSImage(contentsOfURL: imageURL)
// PRESENT image IN THE VIEW CONTROLLER
}
}
}
However, I don't see any way to connect to ViewController from AppDelegate. I have only managed to find suggestions that I should look at self.window! in AppDelegate, but there is no such thing as a window in AppDelegate.
Thanks,
Michael Knudsen
It seems that AppDelegate can connect to objects only within Application Scene in a storyboard. If you want to get a ViewController, instantiate it from a storyboard.
sample:
#IBAction func menuAction(sender: AnyObject) {
if let storyboard = NSStoryboard(name: "Main", bundle: nil) {
let controller = storyboard.instantiateControllerWithIdentifier("VC1") as NSViewController
if let window = NSApplication.sharedApplication().mainWindow {
window.contentViewController = controller // just swap
}
}
}
You can access the mainWinow property and the contentViewController property to create a reference to your custom ViewController class. This is similar to the iOS rootViewController property.
let rootViewController = NSApplication.shared().mainWindow?.windowController?.contentViewController as! ViewController
Now you can use this reference to access IBOutlets on your main storyboard from your AppDelegate.
rootViewController.myTextView.textStorage?.mutableString.setString("Cats and dogs.")
This is good for a simple app with one Window with one ViewController.
I was stuck trying to do this same thing recently and managed to get the event I needed to update my view by creating the #IBAction in my ViewController and control dragging to my Application's First Responder (above the menu in my storyboard view).
Here's the question that got me out of the woods:
Application Menu Items Xcode
And thanks to Bluedome for the suggestion to connect it to First Responder's action.
If you control-drag from the menu to the first responder (red cube above menu) and picked an existing action, then you can "responder chain" to your view controller. In my case I attached Open to openFile and then in my view controller I added the following
override var acceptsFirstResponder: Bool {
return true
}
func openFile(sender: NSMenuItem) {
print("In view controller")
}
and it worked without any changes in AppDelegate. Most of the menus are already hooked up to first responder so just add the matching function name in your view controller.
See this comment and this document on Event Handling Basics for more info.
In Swift 5 and accessing new windows array:
#IBAction func menuAction(sender: AnyObject) {
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let controller = storyboard.instantiateInitialViewController()
// The windows in the array are ordered from back to front by window level;
// thus, the last window in the array is on top of all other app windows.
// On app launch, UIApplication.shared.windows.count == 1 anyway.
if let window = UIApplication.shared.windows.last {
window.rootViewController = controller
}
}
I am new to iOS development, and am trying to learn storyboarding, Swift, and the new features of iOS 8 at the same time.
I have created a very simple storyboard that uses a Popover presentation segue to display another view. On the simulator, if I run this for an iPad, it works as expected. However, if I run it for an iPhone, instead of a popover, it displays a full-screen view, on top of the original view. This is fine; however, there is no way to dismiss it and go back to the original screen.
I have watched the WWDC 2014 video "228 A Look inside presentation controllers" and they can show a dismiss button if they build the user interface entirely with code.
I have also watched the "411 What's new in interface builder" session, where they say that this can be done in Interface Builder, but they do not show it, promising to show how to do it in the lab, if anyone is interested. Unfortunately, I did not attend WWDC 2014, or know anyone who has. My Google searches have not returned anything helpful either.
You could add the navigation controller like this-
Set your popover view controller as the root view controller to a navigation controller.
Delete the popover segue that you are currently using
Reconnect the segue from the button you are displaying the popover from to the navigation controller.
On iPad you will get a popover and on iPhone you will get a modal presentation. Both the iPad and iPhone will show the navigation controller. Depending on your use case this may or may not be something you want. Here's a screen show of what the storyboard should look like.
If you really do want your view controller to always be a popover leave your storyboard the way it is and add something like this to your view controller that presents the popover-
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([segue.identifier isEqualToString:#"Your segue name"]) {
UIViewController *yourViewController = segue.destinationViewController;
yourViewController.modalPresentationStyle = UIModalPresentationPopover;
UIPopoverPresentationController *popoverPresentationController = yourViewController.popoverPresentationController;
popoverPresentationController.delegate = self;
}
}
The view controller presenting the popover will also need to respond to this UIPopoverPresentationDelegate method
- (UIModalPresentationStyle)adaptivePresentationStyleForPresentationController:(UIPresentationController *)controller
{
return UIModalPresentationNone;//always popover.
}
Lastly, you could do the following to only add the navigation controller to the modal presentation of your view controller on the iPhone and leave the popover on iPad without a navigation controller.
Leave your storyboard as is.
The proper place to inject the navigation controller is in - (UIViewController *)presentationController:(UIPresentationController *)controller viewControllerForAdaptivePresentationStyle:(UIModalPresentationStyle)style. In order for this to be called we must set ourselves as the delegate of the UIPopoverPresentationController.
Once again we will do this in prepareForSegue:
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([segue.identifier isEqualToString:#"Your segue name"]) {
UIViewController *yourViewController = segue.destinationViewController;
yourViewController.modalPresentationStyle = UIModalPresentationPopover;
UIPopoverPresentationController *popoverPresentationController = yourViewController.popoverPresentationController;
popoverPresentationController.delegate = self;
}
}
Then we will do this in the delegate method that I mentioned above
-(UIViewController *)presentationController:(UIPresentationController *)controller viewControllerForAdaptivePresentationStyle:(UIModalPresentationStyle)style
{
UIViewController *presentedViewController = controller.presentedViewController;
UINavigationController *navigationController = [[UINavigationController alloc]
initWithRootViewController:presentedViewController];
UIBarButtonItem *dismissButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonItemStyleDone target:self action:#selector(done:)];
presentedViewController.navigationItem.rightBarButtonItem = dismissButton;
return navigationController;
}
Good Luck!
If what you want is a popover on your iPad but a modal sheet with a close button on your iPhone then you can do it without creating an extra navigation controller in storyboard for the popover.
In Xcode 6.3 storyboard, you simply hook up a view controller and designate the segue as a "Present as Popover"
The code below should go in the view controller that segues to the popover, not in the popover itself:
First you set up the popover delegate:
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if (segue.identifier == "myPopoverSegueName") {
let vc = segue.destinationViewController
vc.popoverPresentationController?.delegate = self
return
}
}
Then you add the delegate extension (below your view controller's code) and create the navigation controller / close button on the fly:
extension myViewController: UIPopoverPresentationControllerDelegate {
func presentationController(controller: UIPresentationController, viewControllerForAdaptivePresentationStyle style: UIModalPresentationStyle) -> UIViewController? {
let btnDone = UIBarButtonItem(title: "Done", style: .Done, target: self, action: "dismiss")
let nav = UINavigationController(rootViewController: controller.presentedViewController)
nav.topViewController.navigationItem.leftBarButtonItem = btnDone
return nav
}
}
Then you add your dismiss function and you should be good to go:
func dismiss() {
self.dismissViewControllerAnimated(true, completion: nil)
}
I am not sure why you need to do storyboard setup for the Done button, all the work can be done programmatically with few lines of code. The important part is to implement some UIAdaptivePresentationControllerDelegate protocol methods exactly like below:
func adaptivePresentationStyleForPresentationController(controller: UIPresentationController) -> UIModalPresentationStyle
{
return .FullScreen
}
func presentationController(controller: UIPresentationController,
viewControllerForAdaptivePresentationStyle style: UIModalPresentationStyle) -> UIViewController?{
var navController:UINavigationController = UINavigationController(rootViewController: controller.presentedViewController)
controller.presentedViewController.navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.Done, target: self, action:"done")
return navController
}
Then, a simple method to implement the dismissing behavior for the popover in case it was presented in full screen:
func done (){
presentedViewController?.dismissViewControllerAnimated(true, completion: nil)
}
and you done!
In my case, I had a small popup that I wanted to be a popup on both an iPhone and iPad - and wanted to avoid using a navigation bar with a Dismiss. Discovered that one needed to implement two delegate calls (Swift 3.0):
extension MyViewController : UIPopoverPresentationControllerDelegate {
// Needed for iPhone popup
func adaptivePresentationStyle(for controller: UIPresentationController) -> UIModalPresentationStyle {
return .none
}
// Needed for iPhone in landscape
func adaptivePresentationStyle(for controller: UIPresentationController, traitCollection: UITraitCollection) -> UIModalPresentationStyle {
return .none
}
}
Its possible to do it with mimimal code whilst putting the logic into the storyboard instead. In the view controller that presents the popover, just put in the marker method
#IBAction func unwindToContainerVC(segue: UIStoryboardSegue) {
}
It does not need any code but needs to be present so you can control drag to the Exit icon later on when you use interface builder.
I have my popover content not take up the entire background view but have a small margin around it. This means you can use interface builder to create a tap gesture recogniser for this view. Control drag the gesture recogniser to the Exit icon which then pops up some Exit choices, one of which is the unwindToContainerVC method as seen above.
Now any tap around the edge (such as in an iPhone 4S scenario) takes you back to the presenting view controller.
Here is the connections inspector for the gesture recogniser:
(Xcode6, iOS8, Swift, iPad)
I am trying to create a classic Web-like modal view, where the outside of the dialog box is "grayed-out." To accomplish this, I've set the alpha value of the backgroundColor of the view for the modal to 0.5, like so:
self.view.backgroundColor = UIColor.blackColor().colorWithAlphaComponent(0.5)
The only problem is that when the modal becomes full-screen, the presenting view is removed. (Ref Transparent Modal View on Navigation Controller).
(A bit irritated at the concept here. Why remove the underlying view? A modal is, by definition, to appear atop other content. Once the underlying view is removed, it's not really a modal anymore. it's somewhere between a modal and a push transition. Wa wa wa... Anyway..)
To prevent this from happening, I've set the modalPresentationStyle to CurrentContext in the viewDidLoad method of the parent controller, and in Storyboard... but no luck.
self.modalPresentationStyle = UIModalPresentationStyle.CurrentContext
self.navigationController.modalPresentationStyle = UIModalPresentationStyle.CurrentContext
How do I prevent the presenting view from being removed when the modal becomes full screen?
tyvm.. more info below.
Also in Storyboard, like so (Presentation: Current Context)
Thx for your help... documentation below:
First, remove all explicit setting of modal presentation style in code and do the following:
In the storyboard set the ModalViewController's modalPresentation style to Over Current context
Check the checkboxes in the Root/Presenting ViewController - Provide Context and Define Context.
They seem to be working even unchecked.
You can try this code for Swift:
let popup : PopupVC = self.storyboard?.instantiateViewControllerWithIdentifier("PopupVC") as! PopupVC
let navigationController = UINavigationController(rootViewController: popup)
navigationController.modalPresentationStyle = UIModalPresentationStyle.OverCurrentContext
self.presentViewController(navigationController, animated: true, completion: nil)
For swift 4 latest syntax using extension:
extension UIViewController {
func presentOnRoot(`with` viewController : UIViewController){
let navigationController = UINavigationController(rootViewController: viewController)
navigationController.modalPresentationStyle = UIModalPresentationStyle.overCurrentContext
self.present(navigationController, animated: false, completion: nil)
}
}
How to use:
let popup : PopupVC = self.storyboard?.instantiateViewControllerWithIdentifier("PopupVC") as! PopupVC
self.presentOnRoot(with: popup)
The only problem I can see in your code is that you are using CurrentContext instead of OverCurrentContext.
So, replace this:
self.modalPresentationStyle = UIModalPresentationStyle.CurrentContext
self.navigationController.modalPresentationStyle = UIModalPresentationStyle.CurrentContext
for this:
self.modalPresentationStyle = UIModalPresentationStyle.OverCurrentContext
self.navigationController.modalPresentationStyle = UIModalPresentationStyle.OverCurrentContext
This worked for me in Swift 5.0. Set the Storyboard Id in the identity inspector as "destinationVC".
#IBAction func buttonTapped(_ sender: Any) {
let storyboard: UIStoryboard = UIStoryboard(name: "Main", bundle: Bundle.main)
let destVC = storyboard.instantiateViewController(withIdentifier: "destinationVC") as! MyViewController
destVC.modalPresentationStyle = UIModalPresentationStyle.overCurrentContext
destVC.modalTransitionStyle = UIModalTransitionStyle.crossDissolve
self.present(destVC, animated: true, completion: nil)
}
The problem with setting the modalPresentationStyle from code was that you should have set it in the init() method of the presented view controller, not the parent view controller.
From UIKit docs: "Defines the transition style that will be used for this view controller when it is presented modally. Set
this property on the view controller to be presented, not the presenter. Defaults to
UIModalTransitionStyleCoverVertical."
The viewDidLoad method will only be called after you already presented the view controller.
The second problem was that you should use UIModalPresentationStyle.overCurrentContext.
The only way I able to get this to work was by doing this on the presenting view controller:
func didTapButton() {
self.definesPresentationContext = true
self.modalTransitionStyle = .crossDissolve
let yourVC = self.storyboard?.instantiateViewController(withIdentifier: "YourViewController") as! YourViewController
let navController = UINavigationController(rootViewController: yourVC)
navController.modalPresentationStyle = .overCurrentContext
navController.modalTransitionStyle = .crossDissolve
self.present(navController, animated: true, completion: nil)
}
I am updating a simple solution. First add an id to your segue which presents modal. Than in properties change it's presentation style to "Over Current Context". Than add this code in presenting view controller (The controller which is presenting modal).
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
let Device = UIDevice.currentDevice()
let iosVersion = NSString(string: Device.systemVersion).doubleValue
let iOS8 = iosVersion >= 8
let iOS7 = iosVersion >= 7 && iosVersion < 8
if((segue.identifier == "chatTable")){
if (iOS8){
}
else {
self.navigationController?.modalPresentationStyle = UIModalPresentationStyle.CurrentContext
}
}
}
Make sure you change segue.identifier to your own id ;)