I am wondering if it is possible to set a view controller's view over one of its child view controller's view ?
Let's explain that with an example :
Let's say I have two UIViewControllers : parentVCand childVC. childVC is a child of parentVC.
Now, I have a UIButton ( called button ) which is a subview of parentVC.view.
I set childVC from parentVC like that :
self.addChildViewController(childVC)
childVC.didMoveToParentViewController(self)
childVC.view.frame = CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height
self.view.addSubview(childVC.view)
Now, I want button to show up even if childVC.view covers parentVC.view.
Do you guys think there's a way to do that ? I tried to play with button.layer.zPosition but I couldn't succeed.
Yes, you can, you just need to add the button to the view hierarchy or move the button up in the hierarchy after you add the child view controller.
yes you can do that first of all when you load a childview on a viewcontroller make a view like. There is a container on top covering almost 90% screen and at bottom there is a button,So when you load the view on container and sub view show's you on top if you tap a button then add a subview and bring that subview to front.
Related
I added child view controller to parent view controller programmatically in swift 3.0.
But I do not want the child view controller width as full screen, I want to customise the width and height of the child view controller. I tried to open the custom size child view controller, but it is not working.
// Here is my code
let secondViewController = storyboard.instantiateViewController(withIdentifier: storyBoardName)
secondViewController.modalPresentationStyle = UIModalPresentationStyle.custom
secondViewController.view.frame = CGRect(x: 0, y: 0, width: self.view.bounds.width-500, height: self.view.bounds.height)
self.present(secondViewController, animated: false, completion: nil)
Is there a way to achieve this?
In your code, you are not adding the secondViewController as childview controller. You are presenting that view controller. There is a difference.
You are trying to use UIModalPresentationStyle.custom to present viewcontroller using custom style. But using this custom style is not this trivial.
From documentation:
Creating a custom style involves
subclassing UIPresentationController and using its methods to animate
any custom view onto the screen and to set the size and position of
the presented view controller. The presentation controller also
handles any adaptations that occur because of changes to the presented
view controller’s traits
It tells you that you need to subclass UIPresentationController and subclass its method(with other methods) - (CGRect)frameOfPresentedViewInContainerView to set the frame of the presented viewcontroller.
More is explained in this link.
You can ofcourse achieve all this by actually adding a childviewcontroller.
Steps would be like this:
Create your child viewcontroller instance.
Set its view frame to whatever you want.
Add its view as a subview on to parent view controller's view using addSubview:
Call [addChildViewController] on parent viewcontrller (https://developer.apple.com/documentation/uikit/uiviewcontroller/1621394-addchildviewcontroller)
It depends on what you're trying to do, when I want to show some UI on top of another UIViewController I usually use a fullscreen view controller with self.modalPresentationStyle = .overFullScreen. Then I create another view which has the visible size I actually want to show to the user. This allows you to do pretty much anything you want.
But if you want an actual child viewcontroller, you need to use the appropriate functions for it.
I am creating a child view controller in a parent view controller and presenting it with the code below -
self.addChildViewController(childVC)
childVC.view.frame = self.view.bounds
self.view.addSubview(childVC.view)
childVC.view.autoresizingMask = [.flexibleWidth,.flexibleHeight]
childVC.didMove(toParentViewController: baseVC)
The child view controller simply displays a 200 X 300 image view right in the middle. I want the child view controller to blur the parent view controller's view and display this opaque image view. However I can't seem to get it to show the underlying parent view controller's contents no matter what I do. I already tried the following in child view controller's viewDidLoad -
view.backgroundColor = UIColor.black.withAlphaComponent(0.5)
What am I missing here? Is there a better approach? The child view controller's purpose is to encapsulate the image preview logic by blurring the parent view controller's contents and display a UIImageView right in its view's center.
Try using ChildVC.backgroundColor = UIColor.black.withAlphaComponent(0.5). This code makes the child view appear semi transparent.
Hope this helps.
Create a new ViewController as a ChildViewController.
Give segue to ChildViewController from ParentViewController.
set following property
You have to select Presentation as Over current context
You can also change the Transition based on your requirement
See following image
Set background color of childViewController view as what you want and set its opacity 50% or 60% , whatever you want.
This will show parent view with blur effect.
My original solution -
view.backgroundColor = UIColor.black.withAlphaComponent(0.5)
is working. My parent view controller's view is white with very sparse detail so I assumed that the parent view isn't visible, silly overlook on my part.
I am trying out an application using a child ViewController inside another viewController.
I have a VC and I am instantiating another VC with its own xib inside the outer VC.
I am adding it as a child using the new iOS 5 method addChildViewController and also I have added its view as a subView.
But how do I control its position and size inside the parent view controller ?
should I modify the frame of the child controller's view ?
or I have to adjust the freeform view in the xib itself ?
Also in my current implementation, the child view starts behind the status bar of the parent viewcontroller's view.
Any idea on how to systematically implemement something like this ?
#define SUBVIEWS_FRAME CGRectMake(0,20,100,100) // whatever frame you need
- (void)addChildViewController:(UIViewController *)childController{
[childController.view setFrame:SUBVIEWS_FRAME];
[super addChildViewController:childController];
}
Simply just add a view in parentViewController #synthesize that view like childView. now add your childViewController as a subView in childView of parentViewController. it will simple to adjust using parentViewController View on nib file. If you have a large childViewController then please use UIScrollView instad of UIView
I have a navigation controller that controls view switch. How can I show a view without removing the current view?
if your new view has a view controller use
[self.navigationController presentModalViewController:newController animated:YES];
This will add a view to the viewcontrollers view.
[parentView addSubview:subView];
This will add the view in variable subView into the view in variable parentView. In your case this would mean parentView is the viewcontroller's view and the subView is the view you want to add.
You can change the position of the subView in the parentView by setting the subview's subview.frame property.
If you are talking about a viewController you want to show take a look at the answer of Andiih.
I would like to have a UITableView in a navigation controller occupying the entire screen. I have a smaller custom UIView which needs to slide up from the bottom, squeezing the table view by 100 pixels. The custom view needs to be static, not moving while the user navigates the tableview. Ive been told not to have 2 UIViewControllers (VC) managing views on the same screen.
Currently, my AppDelegate adds a subview to its window from a VC, which then loads the tableview and custom view with
[self addSubview:tablviewcontroller.view];
[self addSubview:customViewController.view];
How should this be implemented?
the way I would structure this is as follows:
have a UIViewController subclass whose view takes up the entire screen. It will have two subviews.
First subview: The view of the UINavigationController that contains your table view controller.
Second subview: the custom UIView.
Have the UINavigationController's frame initially be set to the entire bounds of the main view controller's view and the custom view's frame just below the visible area of the screen.
When you need to slide up the view, use UIView animation to animate changing the frame of the UINavigationController's view by decreasing the height and change the frame of the custom UIView by changing its y coordinate to now be in-frame.
Okay. You want a navigation controller, of which the root view is a table view. Then, possible by an user input, you want this table view to slide up by 100 pixels, and another view takes place at the bottom. While the other view stays there, the user may keep using the table view.
Here is how I would do it:
Create a generic view controller (let's call it NavigationWithAuxiliaryViewController). The root view of this class covers all your application window.
This view has an instance of UINavigationControlleras its property, say navController. It also has an UIView (for the other view) as its property (say, auxView). Position the other view at the bottom. However, this view is hidden by default. Also, the frame of the root view of UINavigationController covers the entire view.
When you decide to squeeze up the table view, modify frame property of UINavigationController. Do something like this (not this ugly though):
if (slideViewOn) {
[UIView beginAnimations:#"slideUp" context:nil];
navController.view.frame = CGRectMake(0, 0, 320, 260);
auxView.hidden = NO;
[UIView commitAnimations];
} else {
[UIView beginAnimations:#"slideDown" context:nil];
navController.view.frame = CGRectMake(0, 0, 320, 480);
auxView.hidden = YES;
[UIView commitAnimations];
}
The easiest way to squeeze up the whole navigation/table stuff is to modify the whole frame for the navigation controller, which is why you need a separate view (out of the navigation controller) for the other view.