I have custom parent view, which is a sub class UIView with some UIImageView's, UILabel's etc..
I add as a subview screenshot of it.I would like to hide all the subviews and the parent view rather then that screenshot.
Any help on this is appreciated.
Code:
self.temp = [self snapshotViewAfterScreenUpdates:NO];
self.temp.frame = self.bounds;
[self addSubview:self.temp];
I hope the screenshot is one of the subview of your parent view. So hiding the parent view will hide all the subviews including the screenshot.
You can do the following
Make the screenshot size, bound to the parent and add to top
Present the screenshot as a popover/modal-view and blur the parent view
Remove/hide all the subviews from the parent except the screenshot
Related
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 have a scenario where I needed to add an animation inside the Navigation Bar, but the simulator doesn't animate. I add a UIView, add a label/text field and create outlets for the constraints and update them with "UIView animateWithDuration:" Instead, the simulator just updates the constraints and displays the view accordingly, but without any animation. I have tried it by modifying both constraints as well as frames (separately).
[self.view layoutIfNeeded];
[UIView animateWithDuration: 3
delay: 0.0
options: UIViewAnimationOptionCurveEaseInOut
animations: ^{
self.constraint.constant += 60;
NSLog(#"inside animation");
[self.view layoutIfNeeded];
}
completion:nil];
This is shown when I increment the width constraint by "60" in viewDidLoad: . And it comes out non-animated.
When I configure the constraints (increment width by "60") through a button click, even a static updation doesn't happen.
The same code works perfectly outside the navigation bar inside the UIView, though.
Appreciate any help...
If your navigation bar contains some animation, then you could try out drawing custom navigation bar. Here's what you've to do :
In your view controller in viewDidLoad() method add the following code
self.navigationController.navigationBarHidden = YES;
After that using a UIView create a custom navigation bar with frame adjusted to be visible and top.
After that add components on the view and start working with animations.
You can achieve that by taking custom UIView and create width NSLayoutConstraint outlet to it and in code you can handle the constant property of this variable by calling UpdateConstraintsIfNeeded or UpdateViewConstraints method before calling animation code
Ok, I've solved this at last. Phew...
What I did was...
Added a view in place of barButtonItem (let's call this "superView") and over it another view (and let's call this "subView") so that I get the following configuration.
Constraints were set between subView and objects on top of it. Now, I created outlets (superView and subView) for superView and subView, made them transparent (optional, of course).
Useful note: Set the superView's width to the default bar button item's width and the subView's to the screen width. Disable "Clip Subviews" on superView but enable on the subView.
Added animations as needed where I had wanted, but layoutIfNeeded on the "superView", not the parent view.
[self.superView layoutIfNeeded];
Good luck.
I had an UIViewControllerA created with xib for view reusability.
In the xib I simply added another red view to it and set its constraints to top,leading,trailing, and bottom space to red view's superview (which is my A's view).
Add A to another UIViewController B as B's ChildViewController by doing so:
// UIViewControllerB.m
UIViewControllerA *A = [UIViewControllerA alloc] initWithNibName:#"UIViewControllerA" bundle: nil]];
[A.view setFrame:CGRectMake(0,0, self.view.size.width, self.view.size.height/2)];
[self addChildViewController:A];
[self.view addSubview:A.view];
[self.A didMoveToParentViewController:self];
Nothing red or whatever showed up.
I did try [self.A.view setTranslatesAutoresizingMaskIntoConstraints:NO]; though
that seemed to make my constraints useless and actually did not bring up the red view.
Do I have to code the whole thing (UI elements & constraints creation) when I'm working with xib and need some extra view with autolayout?
Thanks for any advice!
The problem is this line:
[A.view setFrame:CGRectMake(0,0, self.view.size.width, self.view.size.height/2)];
Instead, give this view constraints.
When you insert a set of views that uses autolayout into a set of views that uses autolayout, you must use autolayout to position it.
I have a simple UIScrollView
UIScrollView *mainScrollView = [[UIScrollView alloc] initWithFrame:CGRectZero];
[self.view addSubview:mainScrollView];
[mainScrollView mas_makeConstraints:^(MASConstraintMaker *make) {
make.edges.equalTo(self.view);
}];
When the view is loaded and shown, part of UIScrollView appears under the navigation bar. But after rotation the view is suddenly considers navigation bar and pins the view to its bottom.
How can I make a view consider navigation bar from the beginning?
To start UIScrollView at bottom of UINavigationBar then i would suggest you to set Adjust Scroll View Insets property and setting Extend Edges property as well. do the needful changes of below property as per your requirement.
Ok, I solved this issue.
Problem has been solved by moving creation of scrollView to viewDidLoad method. Somehow, if scrollView is created outside the "load" methods, we can face such kind of problems.
In my program needs to create view, then create subView and add it in view.
I create view and subView in storyboard. Then in code:
[subView removeFromSuperview];
[view addSubview:subView];
[self.view addSubview:view];
How can I add subView to view in storyboard without code?
You don't actually need to write any code for this. There are many ways to do this:
Select the subview and drag over the view entry in the Objects Explorer of storyboard. Once you leave the mouse hold, the parent view will have a triangle indicating your subview has become its child and the subview will have a bigger indent than your view
Or you can use the "Embed in View" menu as shown in the below pic [source:http://codesheriff.blogspot.co.il/2014/03/8-tips-for-working-effectively-with.html]
open file inspector ->search for view drag and Drop the view in storyboard
so in this you already holding a view now you adding an view its almost like adding a sub view to the main view this is for adding view without code
Open the storyboard and just create the new view inside the subview.
What your doing above is doing nothing.
[subView removeFromSuperview]; //Your removing subview from the superview
[view addSubview:subView]; //is view a new UIView?
[self.view addSubview:view];
You Will have a View in the bottom of right side.You Just drag and Drop the view Where you Want.To Set constriants clearly We are goin Dynamic view Creation.If you do View creation programmatically it will help you in the future project.