I have a UIViewController (called A), but sometimes I need to show a second UIViewController (called B) , cause I dont wanna disturb the UI actions in A( A still need to respond to some touch actions ), so is there any methods to show B in non-modal way?
Try this :
[self addChildViewController:viewControllerB];
[self.view addSubview:viewControllerB.view];
You can easily embed any viewcontroller in another. check it out:
iOS Nested View Controllers view inside UIViewController's view?
You can embed B in A as a child view.
For an exhaustive description see http://subjective-objective-c.blogspot.co.uk/2011/08/writing-high-quality-view-controller.html, for a simple demo, check out this code: https://github.com/toolmanGitHub/stackedViewControllers
Here's how you can display a view controller in a non-modal way in Swift:
let newController = RegisterController()
self.addChildViewController(newController)
self.view.addSubview(newController.view)
Remove view in a non-modal way:
view.removeFromSuperview()
I guess you are talking about presenting view controllers modally in iPhone. In iPad, just for the sake of completeness in the example, you have more ways to show a view controller modally that doesn't fill the whole screen.
You can use UIViewController containment for this.
All in all it's just adding a view controller as a child of another while adding it's view to the hierarchy.
Check this tutorial at obj.io. This is what #Justafinger is suggesting but complete instead as #Justafinger forgot some important calls.
You can
addChildViewController
like this -
- (void)loadContentView
{
CGFloat ht = 0; // height you want to change;
HomeAdsTVC_iPhone *vc1 = [[HomeAdsTVC_iPhone alloc] init];
[self addChildViewController:vc1];
CGRect frame = self.view.bounds;
frame.origin.y = ht;
frame.size.height -= ht;
vc1.view.frame = self.view.bounds;
[self.view addSubview:vc1.view];
[vc1 didMoveToParentViewController:self];
}
Related
Is there an alternative way to show UIView instead of using .XIB? Because I have many UIViewControllers that I was showing it as presentView and now I have to change it.
My Code:
#IBAction func basketClearButton(sender: UITapGestureRecognizer) {
let basketClearView = UIStoryboard(name:"Main", bundle: nil).instantiateViewControllerWithIdentifier("clearBasket") as! ClearBasketViewController
//self.presentViewController(alert, animated: true, completion: nil)
self.view.addSubview(basketClearView)
}
you can make those view controllers child of the VC you want to present them on here, by making one view controller child of another, you can add view of child VC as a subview to the view of parent VC
in that way you can show them on the same screen and whole of your previous code will stay as it is, only presenting logic will change
This can also be helpful tutorial
Anything you can do in a .xib file, you can also do in code. So, if you have a view controller whose view you wish to add to the display without creating a .xib file for it, you can simply edit the view's content programmatically (for example, [self.view addSubview:someImageViewYouCreated];).
In the main view controller (or any other view controller in which you want to display the other view's content, you can just add the view from the new view controller. If, for example, the view controller you wish to add to the display is called SecondViewController, you'd write:
SecondViewController *newView = [[SecondViewController alloc] init];
[self.view addSubview:newView.view];
If you want to add the view with a fade in animation, you can do something like this:
newView.view.alpha = 0.0;
[UIView animateWithDuration:0.3f animations:^{
newView.view.alpha = 1.0;
}];
For some context, I recommend reading this:
Very relevant question: "From View Controller" disappears using UIViewControllerContextTransitioning
Very relevant answer: https://stackoverflow.com/a/25901154/751268
I'm trying to implement a custom view controller transition that animates the new view controller to cover half the screen, while simultaneously shrinking the presenting view controller to 90% (centered in the window, underneath the presented view controller).
First, my problem was that viewFromKey: returned nil. To solve that, the answer mentioned:
If you want to animate the presenting view controllers's view you should consider using UIModalPresentationFullscreen style or continue using UIModalPresentationCustom and implement your own subclass of UIPresentationController with shouldRemovePresentersView returning YES.
I did that, and viewFromKey: doesn't return nil anymore, but now the presenting view controller disappears completely (which makes sense considering I explicitly say it should by implementing shouldRemovePresentersView).
I add the presenting view controller's view to the container view, but it still gets removed. Is there anything else I should be doing to get this working?
Here's some relevant code:
UIView *fromView = [transitionContext viewForKey:UITransitionContextFromViewKey
UIView *toView = [transitionContext viewForKey:UITransitionContextToViewKey];
BOOL show = self.isPresentation;
UIView *menuView = show ? toView : fromView;
UIView *backView = show ? fromView : toView;
UIView *containerView = [transitionContext containerView];
[containerView addSubview:backView];
[containerView addSubview:dimmedView];
[containerView addSubview:menuView];
// Adjust transforms, alpha and perform animations
I thought that by returning YES from shouldRemovePresentersView and manually adding it to the containerView, that should fix the issue, but backView gets removed anyway...
I'm adding another answer, as my response is too long to fit in a comment.
First of all the viewForKey is available in iOS8, so unless you are targeting iOS8 only (why?) you should not use it, or use it after checking that the UIViewControllerContextTransitioning responds to that selector and use the viewControllerForKey for iOS7.
With that being said, it seems to me that this is a bug and I explain my self:
If you look at the UIPresentationController header file, you will see that it says
// Indicate whether the view controller's view we are transitioning from will be removed from the window in the end of the
// presentation transition
// (Default: YES)
- (BOOL)shouldRemovePresentersView;
So as you see the default is YES, so this should only overriden when you specifically want to say NO.
However, you are right, without this being set explicitly to YES, the viewForKey for the UITransitionContextFromViewControllerKey remains nil.
I think you should fill in a bug report for this and for now use the viewControllerForKey which is fine to be used (nothing wrong with this) as it's not deprecated and works in both OS versions without a problem.
And the reason this is most likely a bug is that the viewForKey should return a view for theUITransitionContextFromViewControllerKey when the shouldRemovePresentersView is explicitly set to NO and not YES.
My 2 cents
Why are you setting shouldRemovePresentersView to YES if what you want is that the fromView remains visible?
I had the same problem as you, as in my custom 3d presentation the parent view controller was removed as soon as the transition was completed.
The solution there is to change the modalPresentationStyle to UIModalPresentationOverCurrentContext
This will specifically prohibit the system to remove the owner viewController when the transition ends.
Still my 3D transition suffered from animation issues, when using this approach.
Si I ended up using a UIModalPresentationCustom modalPresentationStyle which solved almost all my issues, with the exception that the new view controller (which was a UINavigationController) would not move down when the in-call status bar would appear.
To solve this, I ended up changing the modalPresentationStyle back to UIModalPresentationFullScreen after the transition had been completed.
Here is my code that shows the new viewController with the custom presentation:
//show Login Screen
LoginViewController *viewController = [[LoginViewController alloc] initWithNibName:#"LoginViewController" bundle:nil];
UINavigationController *loginNavController = [[UINavigationController alloc] initWithRootViewController:viewController];
loginNavController.interactivePopGestureRecognizer.enabled = YES;
loginNavController.transitioningDelegate = self.customTransitionDelegate;
loginNavController.modalPresentationStyle = UIModalPresentationCustom;
[navigationController presentViewController:loginNavController animated:YES
completion:^{
//important, else status bar is not moving entire screen down....
loginNavController.modalPresentationStyle = UIModalPresentationFullScreen;
}
];
Also very important is that you must NOT add the old view to the containerView when you run your dismissal animation
So if the animation is the presenting, add your toView to the containerView
UIView* inView = [transitionContext containerView];
UIViewController* toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
UIViewController* fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
.....
......
[inView insertSubview:toViewController.view aboveSubview:fromViewController.view];
But on the dismissal presentation DO NOT ADD the view to the containerView as it is still showing (since we specifically asked the system NOT to remove it), but simply animate between the two views.
I have a view controller presented using UIModalPresentationCustom presentation style. I use a custom UIViewControllerTransitioningDelegate to present the view controller as a sidebar (so it slides in from the edge of the screen and does not occupy the full screen).
However when I then present another view controller from this one using UIModalPresentationFullScreen — and then dismiss the full screen view controller, my underlying custom presented controller is suddenly resized to occupy the full screen. Does anyone know why this is the case?
Edit: this is essentially my animateTransition method for presenting the sidebar — I've stripped out most of the code to make it readable. Basically it gets the container from the transitionContext, adds and animates the destination view controller's view to the container.
- (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext
{
UIView *container = transitionContext.containerView;
UIViewController *fromVC = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
UIViewController *toVC = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
UIView *fromView = fromVC.view;
UIView *toView = toVC.view;
if( toVC.isBeingPresented )
{
[container addSubview:toView];
//... Animate some new frame for toView
//Call [transitionContext completeTransition:YES] on animation completion
}
else
{
//... Animate fromView out
//On completion remove fromView from superview
//Call [transitionContext completeTransition:YES] on animation completion
}
}
Edit 2: Doing a little more research, I notice that the frame of my custom presented view controller's view is being set when the view controller above it in the modal stack is dismissed. The following stack trace leads to the frame being set as full screen:
0 -[MyCustomPresentedViewControllerView setFrame:]
1 -[UIView(MPAdditions) setFrameOrigin:]
2 -[UIViewControllerAccessibility(SafeCategory) dismissViewControllerWithTransition:completion:]
3 -[UIViewController dismissViewControllerAnimated:completion:]
Changing the presentation style by assigning:
viewController.modalPresentationStyle = UIModalPresentationOverCurrentContext;
results in the modal presentation controller occupying a fraction of the screen, the same fraction as the original presented view controller of the UIPresentationController.
However, using viewController.modalPresentationStyle = UIModalPresentationOverFullScreen
is better for this case, since his modal controller is full screen.
I am experiencing the same issue. I've tried debugging it using symbolic breakpoints and there seem to be some internal call on some kind of layout manager that does this.
While I wasn't able to "solve" this (it seems to me like a bug in the SDK), I was able to come up with a workaround that fixes this. Basically, you have to set the correct dimensions of the presented view at two opportune times. Like this:
In the view controller that was presented using your custom UIPresentationController, add this:
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
dispatch_async(dispatch_get_main_queue(), ^{
self.view.frame = [self.presentationController frameOfPresentedViewInContainerView];
});
}
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
self.view.frame = [self.presentationController frameOfPresentedViewInContainerView];
}
And if you are wondering: yes, you do need it to do in two places. Because weirdly enough, when I did it only in the viewDidAppear async block, it got broken (resized to fullscreen) once the animation finished.
Try to use:
viewController.modalPresentationStyle = UIModalPresentationOverCurrentContext;
It helped me in iOS 8.1
I have a UIViewController called DashBoardViewController that acts as delegate for a UITabBar. In its xib I have placed a UITabBar with 3 UITabBarItem.
Each of these items activate a different View Controller, let's call them ViewController1, ViewController2, ViewController3
DashBoardViewController is supposed to show ViewController1 and select the first bar on loading, so in my initWithNibName I have what follows:
...
ViewController1* vc = [[ViewController1 alloc] initWithNibName:#"ViewController1" bundle:nil];
[self.view addSubview:vc.view];
self.currentViewController = vc;
...
I implement the UITabBarDelegate having something as follows:
if (item == viewController1Item) {
ViewController2 *vc2 = [self.childrenControllers objectAtIndex:1];
[self.currentViewController.view removeFromSuperview];
[self.view addSubview:vc2.view];
self.currentViewController = vc2;
} ...
Problem
The View Controller in the first UITabBarItem always works as expected, extending it to the full size of thew view.
However, in the second and following tabs, this doesn't happen: the view doesn't extends. This shows if, for example, I align a tab with the bottom in the ViewController2 XIB: this will not be at the bottom when viewed inside the UITabBarItem.
Note
Please note that this is not related to the XIB: if I invert ViewController1 and ViewController2, it will be ViewController1 the one failing to extend. It's related to the UITabBarItem.
Ideas
Possibly, this depends by the way I addSubview when I call the DashBoardViewController's initWithNibName. But I can't find a way to explain this.
Other details
All the XIB are set with "Size = none".
I can't really speak to the way you have your XIB setup without seeing it, but I can make a couple of suggestions.
The behaviour that you're trying to implement by removing & adding subviews to DashBoardViewController should really be handled by a UITabBarController. This provides a UITabBar, a view for your content and handles the logic of switching between UIViewControllers while keeping layout sane and being part of the SDK.
If for some reason you can't, or don't want to use a UITabBarController, I'd suggest implementing a viewWillLayoutSubviews method on your DashBoardViewController, like so:
- (void)viewWillLayoutSubviews
{
if( self.currentViewController )
{
self.currentViewController.view.frame = self.view.bounds;
}
}
Maybe also try adding the self.currentViewController.view.frame = self.view.bounds; line after you've swapped ViewControllers too, for good measure. This will make sure that the frame of your current ViewController's view is always sized to fill the bounds of DashBoardViewController's view.
This isn't the 'Proper' way to do it though, I'd really recommend using a UITabBarController if you can, since you don't know how much else of UITabBarController you'll end up re-implementing if you start rolling your own controller.
Any further problems will most probably be to do with the internal layout of your sub-ViewControllers, rather than their size / position in DashBoardViewController's view.
On your XIB File make sure that your set the flexible height to stick to top and bottom, this way the UITableView will always have the same height as the 4" display
I have a UISplitViewController in an iPad app. When something is selected from the table I want to fade in a modal view controller over the detail view. I can present it without a problem, but for some reason I can't get it to match the frame of the detail view. I would like it to stick to the detail view controller frame on rotation as well. Does anyone have any experience with this? This is my code to display. The detail view controller reference is set in the app delegate and passed down the table controllers.
QuestionViewController_iPad *questionView = [[[QuestionViewController_iPad alloc] initWithNibName:#"QuestionViewController_iPad" bundle:nil] autorelease];
questionView.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
// Not quite
questionView.modalPresentationStyle = UIModalPresentationCurrentContext;
questionView.questionQuizCon = [QuestionQuizConnection firstQuestionForQuiz:quizCatCon.quiz];
// Maybe something like this?
[self.detailViewController presentModalViewController:questionView animated:YES];
When the modal view presents, it matches the size of the detail view controller, but it doesn't but it sits on the top left of the screen behind the master view controller. It also doesn't resize on rotation. I have the springs and struts set to auto size and fill. The height changes on rotation but it won't fill the width.
I couldn't get this to look right any way I tried it so I ended up just using view transitions to make it look like pages being torn off a notebook. That looks better anyway.
// Transition the view on as a subview.
[UIView transitionWithView:self.detailViewController.pageView duration:1.0
options:UIViewAnimationOptionTransitionCurlUp
animations:^ {
questionView.view.frame = CGRectMake(0, 0, self.detailViewController.pageView.frame.size.width, self.detailViewController.pageView.frame.size.height);
[self.detailViewController.pageView addSubview:questionView.view];
// Watch this one
self.detailViewController.currentQuestionViewController = questionView;
}
completion:nil];
After [self.detailViewController presentModalViewController:questionView animated:YES]; you should set center property and/or frame of questionView. Be sure that you set it after presenting modal view.