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What is presentedviewcontroller?
The view controller that is presented by this view controller, or one of its ancestors in the view controller hierarchy.
How do I present a ViewController in Swift?
- // Register Nib.
- let newViewController = NewViewController(nibName: “NewViewController”, bundle: nil)
- // Present View “Modally”
- self. present(newViewController, animated: true, completion: nil)
How do you check current view controller class in Swift?
- 169.
- 134. Get the current displaying UIViewController on the screen in AppDelegate.m.
- Get current view controller from the app delegate (modal is possible)
- Detecting which view is present in applicationWillEnterForeground.
Can a presented view controller also be a presenting view controller?
That’s not true. It’s normal and acceptable to present view controllers on top of other presented view controllers.
What is a navigation controller Swift?
A navigation controller is a container view controller that manages one or more child view controllers in a navigation interface. In this type of interface, only one child view controller is visible at a time.
What is push and pop in Swift?
The latest song is added on top of a stack. If you don’t like that song, you can always press back (pop) and forward(push) to insert a new random song in the queue. Let’s launch the XCode playground and implement Swift Stacks.
What is Modalpresentationstyle?
The presentation style for modal view controllers.
How do I get root view controller?
The root view controller is simply the view controller that sits at the bottom of the navigation stack. You can access the navigation controller’s array of view controllers through its viewControllers property. To access the root view controller, we ask for the first item of the array of view controllers.
How do I present a ViewController on half screen?
- Present modal view controller in half size parent controller.
- -1. Make UIViewController appear from bottom, then hide it.
- Can one make Navigationcontroller present half of its original size swift.
- Swift 5 Present ViewController half way.
How do I present a view controller?
- Use a segue to present the view controller automatically. …
- Use the showViewController:sender: or showDetailViewController:sender: method to display the view controller. …
- Call the presentViewController:animated:completion: method to present the view controller modally.
How do I get topmost Viewcontroller?
In addition, you can check for UINavigationController and ask for its topViewController or even check for UITabBarController and ask for selectedViewController . This will get you the view controller that is currently visible to the user.
How do I use PopToViewController?
- PopViewController is not push a view controller its function like if You press A button then From VC1 you navigate to VC2 and on VC2 there is Button called B . Now when u press B and u use PopToViewController then it will navigate to VC1.. …
- What u want exactly need to push from A-B or Want pop from B-A ? – Anny.
How do I push a controller without navigation controller?
You can’t push a view controller onto a navigation controller if there is no navigation controller. If you are wanting to be pushing controllers and have it display the topmost controller and everything, just use a UINavigationController and be done with it.
How do I use Popoverpresentationcontroller?
- create one XIB and swift file for popup menu . ( ex. MenuViewController)
- create another xib or storyboard view controller file for display popup menu . ( ex. ViewController)
- in viewController file add UIPopoverPresentationControllerDelegate.
- add button in ViewController and create IBAction and write bellow code.
What is Definespresentationcontext?
A Boolean value that indicates whether this view controller’s view is covered when the view controller or one of its descendants presents a view controller.
What is Definespresentationcontext?
A Boolean value that indicates whether this view controller’s view is covered when the view controller or one of its descendants presents a view controller.
What is present Modally?
Present Modally – Presents a view controller overtop the current view controller in various fashions as defined by the modal presentation and transition style – most commonly used to present a view controller in a sheet that animates up from the bottom.
How do you go full screen on IOS 13?
Initially, the default value is fullscreen for modalPresentationStyle, but in iOS 13 its changes to the UIModalPresentationStyle. automatic . If you want to make the full-screen view controller you have to change the modalPresentationStyle to fullScreen .
How do you present a view in Modally?
- Create the view controller object you want to present. …
- Set the modalPresentationStyle property of the new view controller to the desired presentation style.
- Set the modalTransitionStyle property of the view controller to the desired animation style.
Apple Developer Documentation
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wifi – iOS Swift: presented view controller is nil – Stack Overflow
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Understanding presentingViewController in iOS – DEV Community
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- Summary of article content: Articles about Understanding presentingViewController in iOS – DEV Community Tagged with ios, swift, present, viewcontroller. … So in this example, vc2 can be a presentedViewController of both original presenter … …
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Present ViewController in Swift – Swift Developer Blog
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Present ViewController Code Example in Swift
Present ViewController with XIB Interface
Wrap ViewController into NavigationController and Present
ios – How do you check current view controller class in Swift? – Stack Overflow
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ios – Can a presented view controller also be a presenting view controller? – Stack Overflow
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Tìm hiểu về UIPresentationController: tạo custom present cho UIViewController
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- Summary of article content: Articles about Tìm hiểu về UIPresentationController: tạo custom present cho UIViewController swift với PresentedViewController thừa kế từ UIViewController. Bước 2: Trong file Main.Storyboard, kéo tạo UIViewController, set … …
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presentingViewControllerとpresentedViewController – your3i’s blog
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- Summary of article content: Articles about presentingViewControllerとpresentedViewController – your3i’s blog The view controller that presented this view controller. Discussion. When you present a view controller modally (either explicitly or implicitly) … …
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presentingViewControllerとpresentedViewController – your3i’s blog
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- Summary of article content: Articles about presentingViewControllerとpresentedViewController – your3i’s blog if let first = presentingViewController, let second = first.presentingViewController{ first.view.isHden = true second.dismiss(animated: true) } …
- Most searched keywords: Whether you are looking for presentingViewControllerとpresentedViewController – your3i’s blog if let first = presentingViewController, let second = first.presentingViewController{ first.view.isHden = true second.dismiss(animated: true) } はじめに presentingViewControllerとpresentedViewController、毎回どれがどれってわからなくなるので、今回徹底的に調査しようと。 とりあえず~それぞれの定義 presentingViewController The view controller that presented this view controller. Discussion When you present a view controller modally (either explicitly or implicitly) using the present(_:animated:…
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Get top most UIViewController in Swift | Coding
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- Most searched keywords: Whether you are looking for Get top most UIViewController in Swift | Coding To get the topmost view controller in Swift you need to take into … rootViewController { while let presentedViewController = controller. To get the topmost view controller in Swift you need to take into account the presented viewcontrollers. This can be achieved in the following ways if var controller = window.rootViewController { while let presentedViewController = controller.presentedViewController { controller = presentedViewController } // controller is the topmost one } else { fatalError() } You also needget top most uiviewcontroller,get top most uiviewcontroller ios 13
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Understanding presentingViewController in iOS
https://developer.apple.com/documentation/uikit/uiviewcontroller/1621380-present
The object on which you call this method may not always be the one that handles the presentation. Each presentation style has different rules governing its behavior. For example, a full-screen presentation must be made by a view controller that itself covers the entire screen. If the current view controller is unable to fulfill a request, it forwards the request up the view controller hierarchy to its nearest parent, which can then handle or forward the request.
Suppose we are trying to present viewController2 onto viewController1
vc1.present(v2, animated: true, completion: nil)
After this vc1.presentedViewController == vc2 . You may also think that vc2.presentingViewController == vc1 but this is not always the case.
When a presenting view controller happens, there may be 3 players in the game
Presented view controller
This is vc2
Original presenter
This is vc1, and sometime called source view controller. At this stage, vc1.presentedViewController == vc2
Presenting view controller
This is vc2.presentingViewController , but it is not always vc1 . This is the view controller whose view is replaced or covered by vc2.view . It is by default the view controller whose view occupies the entire screen, it can be either root view controller or an already presented view controller. It might not be the same as vc1.
For example, the presenting view controller is the root view controller, we have rootViewController.presentedViewController == vc2 . So in this example, vc2 can be a presentedViewController of both original presenter (vc1) and presenting view controller (root view controller)
If vc1 occupies the whole screen, original presenter and presenting view controller are the same (vc1)
In another world, vc2.presentingViewController will only point to the real presenting view controller.
https://developer.apple.com/documentation/uikit/uiviewcontroller/1621505-dismiss
We can send dismiss(animated:completion:) to any of those 3 objects, the system will forward that message to the presenting view controller.
Continue with the example of the rootViewController as the real presenting view controller, if you say
vc2 . dismiss ( animated : true , completion : nil )
then root view controller with be the one that receives this message.
Chain of presented view controller
A view controller can have at most 1 presentedViewController at a time. However, a presented view controller (vc2) can itself presents another view controller (vc3)
vc2 . present ( vc3 , animated : true , completion : nil )
Presentation context
So what does it mean by “occupy the whole screen”. Read Presentation Contexts Provide the Area Covered by the Presented View Controller
The area of the screen used to define the presentation area is determined by the presentation context. By default, the presentation context is provided by the root view controller, whose frame is used to define the frame of the presentation context. However, the presenting view controller, or any other ancestor in the view controller hierarchy, can choose to provide the presentation context instead. In that case, when another view controller provides the presentation context, its frame is used instead to determine the frame of the presented view. This flexibility allows you to limit the modal presentation to a smaller portion of the screen, leaving other content visible. When a view controller is presented, iOS searches for a presentation context. It starts at the presenting view controller by reading its definesPresentationContext property. If the value of this property is YES, then the presenting view controller defines the presentation context. Otherwise, it continues up through the view controller hierarchy until a view controller returns YES or until it reaches the window’s root view controller. When a view controller defines a presentation context, it can also choose to define the presentation style. Normally, the presented view controller determines how it presented using its modalTransitionStyle property. A view controller that sets definesPresentationContext to YES can also set providesPresentationContextTransitionStyle to YES. If providesPresentationContextTransitionStyle is set to YES, iOS uses the presentation context’s modalPresentationStyle to determine how the new view controller is presented.
definesPresentationContext
https://developer.apple.com/documentation/uikit/uiviewcontroller/1621456-definespresentationcontext
When a view controller is presented, iOS starts with the presenting view controller and asks it if it wants to provide the presentation context. If the presenting view controller does not provide a context, then iOS asks the presenting view controller’s parent view controller. iOS searches up through the view controller hierarchy until a view controller provides a presentation context. If no view controller offers to provide a context, the window’s root view controller provides the presentation context. If a view controller returns YES, then it provides a presentation context. The portion of the window covered by the view controller’s view determines the size of the presented view controller’s view. The default value for this property is NO.
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Present ViewController in Swift
With his short Swift code example I am going to share with you how to present user with a new ViewController instantiated from the Main storyboard.
The below code example needs to be ran from a ViewController over which you would like to present another/target ViewController. The presented View Controller will appear on top of current one.
Make sure you provide correct identifier of your target ViewController or other wise it will not work. In my case I am presenting a ViewController that has an Identifier set to “RegisterAccountViewController”.
Present ViewController Code Example in Swift
For the below code to work you, will need to create a new ViewController using the Storyboard. Then you can instantiate it using the Storyboard and present it to user the following way:
let registerViewController = self.storyboard?.instantiateViewController(withIdentifier: “RegisterAccountViewController”) as! RegisterAccountViewController self.present(registerViewController, animated: true)
Present ViewController with XIB Interface
For the below code example to work, you will need to create a new user interface file using XIB and set its File Owner to the ViewController you need. In my case I have created a new ViewController and a XIB file with the same name NewViewController.
To present ViewController which works with XIB file you can use the following example:
// Register Nib let newViewController = NewViewController(nibName: “NewViewController”, bundle: nil) // Present View “Modally” self.present(newViewController, animated: true, completion: nil)
Wrap ViewController into NavigationController and Present
To present a ViewController in a NavigationController you can wrap ViewController into a NavigationController as it is in the example below. Then present NavigationController which contains ViewController.
// Register Nib let newViewController = CustomSignupViewController(nibName: “CustomSignupViewController”, bundle: nil) let navigationController = UINavigationController(rootViewController: newViewController) // Present View “Modally” self.present(navigationController, animated: true, completion: nil)
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How do you check current view controller class in Swift?
Swift 3 | Check if a view controller is the root from within itself.
You can access window from within a view controller, you just need to use self.view.window .
Context: I need to update the position of a view and trigger an animation when the device is rotated. I only want to do this if the view controller is active.
class MyViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() NotificationCenter.default.addObserver( self, selector: #selector(deviceDidRotate), name: .UIApplicationDidChangeStatusBarOrientation, object: nil ) } func deviceDidRotate() { guard let window = self.view.window else { return } // check if self is root view controller if window.rootViewController == self { print(“vc is self”) } // check if root view controller is instance of MyViewController if window.rootViewController is MyViewController { print(“vc is MyViewController”) } } }
If you rotate your device while MyViewController is active, you will see the above lines print to the console. If MyViewController is not active, you will not see them.
So you have finished reading the swift presentedviewcontroller topic article, if you find this article useful, please share it. Thank you very much. See more: presentedViewController, Self presentedviewcontroller, Present modally Swift, Present Swift, Present swift viewcontroller, topViewController, Get top view controller swift, UIViewController lifecycle
