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Questions tagged [uiview-hierarchy]

110 questions
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How can I detect which view is handling my tap?

Somewhere towards the bottom of my view hierarchy, I am implementing a touchesBegan method. It fires on all touches except for single finger taps. This leads me to believe that somewhere higher up in the hierarchy, a view is intercepting/handling…
Mark S
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UIView clipToBounds is not stopping a subView receiving touches outside the parent view

I have two UIViews. I'm using one to contain the other so that I can slide one inside the other. I'm encountering an issue where even though a subView is clipped to the bounds of its parent, it is still receiving touch events and blocking access to…
Tomas McGuinness
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Managing view hierarchy when opening a document

I have an IOS App that can open a specific type of documents. My App receives the document through: - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions when it was not yet started or through…
sebastien
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what does 【give the child view controller a chance to respond to the change in view ownership】mean？

I know when you add a child view controller to a parent you need to perform the following steps: Call the addChildViewController: method of your container view controller. This method tells UIKit that your container view controller is now managing…
WisleyDee
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UIView.animateKeyFrames blocks Uibutton click - view hierarchy issue or nsLayoutConstraint?

I currently have a ToastView class that creates a view that contains a button, label, and image. The goal is to get this ToastView instance to slide up and down on the controller as a subview, like a notification bar. In LayoutOnController(), I add…
kelsey-debug
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How to fix UICollectionView - All cells disappear - Xamarin ios

I am using a UICollectionView in C# Xamarin ios and sometimes all of the cells will disappear from the screen. This happens normally on a scroll and I have to re-invoke the view that my UICollection View is on. I can't show my exact code as this is…
James McNulty
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Dynamic Creation UIButton AddTarget on UIView executed on UIViewController

Currently this code that executes a Tag Styled List, The issue remains when I want to try to pass the addTarget Action optionClicked to my UIViewController DrawerView.swift let menuOptions = ["Info", "Actions", "Users", "Patiens"] …
Eddwin Paz
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assigning new rootViewController to window doesn't remove current from view Hierarchy when debugging view hierarchy using xcode

old root view controller not removed when assigning new root view controller i want to reload the app from its beginning ,but i notice that the old root view Controller not removed from view hierarchy private func reset() { guard let window =…
Amr AbdelWahab
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Sending messages from subview to superview in Cocoa, UIResponder?

I have all these subview which are touch sensitive, I want to send a message from the subview to the superview, to say that a user selected it, so the superview can communicate with the rest of the controller. I can not communicate between the…
Robert
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nil error when attempting to set textfield placeholder, segment uiview

xcode v:9.2 I am trying to load user information from the database to set as placeholder text. I have tested this code on a simpler project that does not have segment views, and it works fine. I did some research and I think it might be a…
cycaMq
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Popover on a Popover issue while tap on notification(Deeplink)

I have already presented a controller on the screen and now click on the home button. Then I need to present another controller on that after tapping on notification using deeplink. When app comes to foreground, new controller is nor presented and…
Mohit Mangla
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(Swift) Switching between UINavigationController and UITabController nested within Main UINavigationController

Through storyboard, the app entry point is a separate UINavigationController that does some logic on user authentication to first determine whether to push the Home view's embedded UITabBarController or present the Sign-In/Sign-Up view's embedded…
Chris
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Overlap label on imageview inside uistackview ios

I would like to overlap two views (one view on top of each other) inside uistackview . My objective is to display initials of username on top of his image. The image size is constant and the initial label should be in centre of image view I have a…
ahmed
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Attempt to present <> on <> whose view is not in the window hierarchy

I'm using this code in AppDelegate where on some condition it either opens login screen or splash screen. like below if (mobile != nil && keepMe == true) { // skip login let initialViewControlleripad : UIViewController =…
shahtaj khalid
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How to show a growing sub view over a parent view

I have a view as follows The colored tiles are basically views. When i long press on the tiled views i am creating a copy of the tile in which it was long pressed. Also when it is long pressed there should be a view as per the following image. The…
Jobins John
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