i have a view controller and i need to dismiss it and present it back in same time.
i had tried dismiss it and call back the view controller but not working.
[self dismissViewControllerAnimated:YES completion:nil];
UIStoryboard *storyboard=[UIStoryboard storyboardWithName:#"Main" bundle:nil];
ExpandViewController *expandView=
[storyboard instantiateViewControllerWithIdentifier:#"ExpandViewController"];
expandView.delegate=self;
[expandView setEventDict:dict];
[self presentViewController:expandView animated:YES completion:NULL];
I am not exactly sure what outcome/functionality you are looking for in your question, but #matt is correct. However, you may be looking to have this happen seamlessly. Therefore you could use child view controllers instead of presenting the view controller using the [self presentViewController:VC animated:animate completion:nil] method.
Adding child vc:
[self addChildViewController:myVC];
[self.view addSubview:myVC.view];
[myVC didMoveToParentViewController:self];
Removing child vc:
[myVC willMoveToParentViewController:nil];
... remove subview.
You can set up a delegate between the two controllers to tell the parent when to dismiss the view to make things easy. You can also add the subviews at different indexes using [self.view insertSubview:myVC atIndex:index] or the other possible functions such as the insert above subview etc, to have one subview be added before dismissing the other to give a more seamless transition.
Hope this helps!
You can't present a view controller until the currently presented view controller has finished being dismissed. You won't know this has happened until the completion handler from your dismissal is called. Your mistake is that the completion handler is nil. Instead, provide a completion handler (in your first line), consisting of the remaining lines of your code. Thus, they will execute after the dismissal finishes.
[self dismissViewControllerAnimated:YES completion:^{
// ... the rest of your code goes in here ...
}];
Related
I have 2 UIViewController's presented with [self presentViewController:viewController animated:YES completion:nil];, I want to dismiss the first one of them, without animation (It's not visible to the user anyway) and when the second one (currently visible) will be dismissed, the user will see the parent view controller who present them both.
- Parent
- First -> Dismiss first without animation
- Second -> Dismiss second with animation
How can I do that?
With your current view controller hierarchy if first view controller will be dismissed it will dismiss second view controller automatically. If you don't want that behaviour than make parent present second view controller. You can do that from first view controller by using [self.presentingViewController presentViewController:secondViewController animated:YES completion:nil]
Why do you want to do this?
You should do it like this for cleaner view hierarchy and better user experience:
Present first view controller :
[self presentViewController:viewController1 animated:YES completion:nil];
Dismiss first & present second view controller :
__weak MyViewController *aBlockSelf = self;
[self dismissViewControllerAnimated:YES completion:^{
[aBlockSelf presentViewController:viewController2 animated:YES completion:nil];
}];
Hi i have been working on an iOS app.What i am doing is navigating among diffrent view controllers. But the problem is i want finish the current view controller from emoery and then move to the next view controller.
I am using `[self.view removeFromSuperview]; for finishing the cureent view & using
self.loginView = [self.storyboard instantiateViewControllerWithIdentifier:#"LOGIN"];
[self presentViewController:self.loginView animated:NO completion:nil];
for moving to next view controller but the thing is i am not able to remove it from memory.
Please tell me how can i do it?
Thanks in advance.
`
It's better to create a container view controller which manages your view controllers. For example, in viewDidLoad: of container controller you add current controller:
[self addChildViewController:self.currentViewController];
[self.currentViewController didMoveToParentViewController:self];
[self.view addSubView:self.currentViewController.view];
//here set up currentViewController view's frame or constraints if needed
When you need to open login controller, do this:
[self addChildViewController:loginViewController];
[self.loginViewController didMoveToParentViewController:self];
[self.view addSubView:loginViewController.view];
//here set up loginViewController view's frame or constraints if needed
//then remove current view controller
[self.currentViewController willMoveToParentViewController:nil];
[self.currentViewController removeFromParentViewController];
[self.currentViewController.view removeFromSuperview];
Remove from superview will remove it from the current view, but OS won't remove it until he needs to (this is topic for more explanation, let's say it won't remove it asap).
If you want something deleted just call it nil:
self.view = nil;
This will make the pointer to nil, so view won't be there any more. (the view really will be somewhere but you won't have access to it)
I am revising your code
self.loginView = [self.storyboard instantiateViewControllerWithIdentifier:#"LOGIN"];
[self presentViewController:self.loginView animated:NO completion:nil];
What you are doing here is presenting your login viewcontroller.
self: This is the instance of the viewcontroller you are currently working on. So how could you remove self from memory. (Not Possible)
You can approach alternate ways.
For example: 1. Changing root view controller
Pop to root view controller and then Push Login View controller.
If you try to remove not only UIView but the whole UIViewController from a navigation controller stack use this snippet
NSMutableArray *stack = [[NSMutableArray alloc] initWithArray: self.navigationController.viewControllers];
[stack removeObject:yourController];
self.navigationController.viewControllers = stack;
Be aware of using this only when you've already pass to the next controller view.
UPD:
Oh, now I see what you are trying to do. And I can't figure out, why you're trying to step your controllers this way (modally). I think you should use UINavigationController with navigation segues defined directly from your storyboard. Look at this article where apple purely explains what navigation is. That article is about modal views
I'm working with SVWebViewController. When I present the view controller here
SVModalWebViewController *webViewController = [[SVModalWebViewController alloc] initWithAddress:address];
webViewController.webDelegate = self;
[self presentViewController:webViewController animated:YES completion:nil];
The view controller slides up from the bottom, as expected. However, when the view controller is dismissed, calling
[self dismissViewControllerAnimated:YES completion:nil];
The view controller simply disappears. No slide animation down. Any thoughts?
EDIT
It turns out a lot of presentation animations aren't displaying correctly in the application. Some pushes on the navigation controller aren't sliding in or sliding out (but some are). They just appear.
[self dismissViewControllerAnimated:YES completion:NULL];
This should be in SVModalWebViewController not SVWebViewController
EDIT: Instead of modally segueing to the SVWebViewController you should push:
SVWebViewController *webViewController = [[SVWebViewController alloc] initWithAddress:#"http://google.com"];
[self.navigationController pushViewController:webViewController animated:YES];
And instead of dismissing you should:
[self.navigationController popViewControllerAnimated:YES];
From SVWebViewController viewWillAppear::
SVWebViewController needs to be contained in a
UINavigationController. If you are presenting SVWebViewController
modally, use SVModalWebViewController instead.
Is your main view controller contained in a navigation controller? If not, this could possibly cause the other animation issues you're facing.
The dismissal should be from the displayed modalViewController.
It happens to me when the destination view controller loads a big picture or background
I am really confused regarding few things in UIViewController, I have already read the View Controller Programming Guide and searched lot on the Internet but still confused.
When I want to jump or switch from firstVC to secondVC how many types of methods are available? I am listing which I know:
UINavigationController
UITabBarController
presentModalViewController:
Add secondVC to root view
If secondVC is added to root view then how firstVC object will be released?
Is it a good practice to add every view I want to jump/switch to root view?
transitionFromView:
I dont understand this portion from Apple doc:
This method modifies the views in their view hierarchy only. It does
not modify your application’s view controllers in any way. For
example, if you use this method to change the root view displayed by a
view controller, it is your responsibility to update the view
controller appropriately to handle the change.
If I do this:
secondViewController *sVc = [[secondViewController alloc]init];
[transitionFromView:self.view toView:sVc.view...
Still viewDidLoad:, viewWillAppear:, viewDidAppear: are working fine: I don't need to call them. So why did Apple say this:
it is your responsibility to update the view controller appropriately to handle the change.
Are there any other methods available?
Actually the standard methods used are :
1) Using NavigationController
//push the another VC to the stack
[self.navigationController pushViewController:anotherVC animated:YES];
//remove it from the stack
[self.navigationController popViewControllerAnimated:NO];
//or presenting another VC from current navigationController
[self.navigationController presentViewController:anotherVC animated:YES completion:nil];
//dismiss it
[self.navigationController dismissViewControllerAnimated:YES completion:nil];
2) Presenting the VC
//presenting another VC from current VC
[self presentViewController:anotherVC animated:YES completion:nil
//dismiss it
[self dismissViewControllerAnimated:YES completion:nil];
Never use the method you described in points 4. It's not a good practice to change root view controller's dynamically. window's root VC is usually defined on applicationdidfinishlaunchingwithoptions after that it shouldn't be changed , if you are to follow apple standards.
Example for transitionFromView:toView
-(IBAction) anAction:(id) sender {
// assume view1 and view2 are some subviews of self.view
// view1 will be replaced with view2 in the view hierarchy
[UIView transitionFromView:view1
toView:view2
duration:0.5
options:UIViewAnimationOptionTransitionFlipFromLeft
completion:^(BOOL finished){
/* do something on animation completion */
}];
}
}
I try 2 ways to dismissed 2 viewcontrollers consecutively but only one of them got dismissed not the second one
method1
-(void) LoginDone:(NSNotification *)notif
{
[self dismissViewControllerAnimated:YES completion:NULL]; //previous viewcontroller
[self dismissViewControllerAnimated:YES completion:NULL]; //current viewcontroller
}
method2
-(void) LoginDone:(NSNotification *)notif
{
[self dismissViewControllerAnimated:YES completion:NULL];
[[NSNotificationCenter defaultCenter] postNotificationName:#"LoginDone2" object:nil];
}
-(void) LoginDone2:(NSNotification *)notif
{
[self dismissViewControllerAnimated:YES completion:NULL];
}
I need to find out a way to dismiss both the previous viewcontroller and current viewcontroller consecutively.
This is now an old question, but it seems to be exactly the problem I am having presently.
Here what I did:
[self.presentingViewController.presentingViewController
dismissViewControllerAnimated:YES completion:nil];
And it works for me. I hope it can be useful to someone.
By calling
[self dismissViewControllerAnimated:YES completion:NULL];
you are telling self to dismiss the view it presented. Telling twice the same self object to dismiss the view it presented, will not change the result. In other words self cannot represent the "current view" and the "previous view" at the same time as per your comment to the code. self is just a single controller representing a single view, either the current or the previous one.
To fix this, you should send the dismissViewControllerAnimated to self (that presented the top-most view, I assume) and to the other view controller object that presented the previous view.
In other words, I would expect something like this:
-(void) LoginDone:(NSNotification *)notif
{
[self dismissViewControllerAnimated:YES completion:NULL];
[self.previousController dismissViewControllerAnimated:YES completion:NULL];
}
Actually, you could send just one message to the second view controller and both views would be dismissed (source):
If you present several view controllers in succession, and thus build a stack of presented view controllers, calling this method on a view controller lower in the stack dismisses its immediate child view controller and all view controllers above that child on the stack. When this happens, only the top-most view is dismissed in an animated fashion; any intermediate view controllers are simply removed from the stack. The top-most view is dismissed using its modal transition style, which may differ from the styles used by other view controllers lower in the stack.
I know this is an old question but maybe somebody will look for solution on this issue so here it is:
-(void) closeModalViews
{
[previousVC dismissViewControllerAnimated:YES completion:^(void) {
[self dismissViewControllerAnimated:YES];
}];
}
I like JPetric's idea, but first you must dismiss the current view controller's view and only then can you dismiss the presenting view controller's view.
[self dismissViewControllerAnimated:NO completion:^(void) {
[self.presentingViewController dismissViewControllerAnimated:NO completion:nil];
}];
As far as I could understand you are trying something like below:
There are 2 view controllers.
You want both of them to be vanished.
Another controller comes in.
But the fact is only one controller is displayed, why you would need to dismiss 2 then?
You can use self.view.hidden=true; on the jumped viewcontrollers while animating back to the first viewcontroller. Using [self.presentingViewController dismiss...] is not working for me without hiding.