In my MainViewController, I present another view controller through this:
MessageViewController *messageController = [[MessageViewController alloc]initWithNibName:nil bundle:nil];
[messageController setModalPresentationStyle:UIModalPresentationFullScreen];
[messageController setModalTransitionStyle:UIModalTransitionStyleFlipHorizontal];
[self presentViewController:messageController animated:YES completion:nil];
[messageController release];
This will display the view controller correctly. However, when I try to go back to the presenting view controller, which in this case should be the MainViewController, this code doesn't work:
if ([self.presentingViewController isKindOfClass:[MainViewController class]])
[(MainViewController *)self.presentingViewController setCurrentViewTag:2];
[self dismissModalViewControllerAnimated:YES];
I removed the "if.." condition to force it in setting the current view tag. An error occurred telling me that the presenting view controller seems to be the UINavigationController:
[UINavigationController setCurrentViewTag:]: unrecognized selector sent to instance 0x8352a50
Can anyone tell me why is this happening? This code used to work before and I am not sure what changed to make it stop working properly.
EDIT
Here is the updated code:
ReaderController *readerController = [[ReaderController alloc]initWithNibName:nil bundle:nil];
[readerController loadWhichViewToShow:2];
[self setDefinesPresentationContext:YES];
[readerController setModalPresentationStyle:UIModalPresentationFullScreen];
[readerController setModalTransitionStyle:UIModalTransitionStyleFlipHorizontal];
[self presentViewController:readerController animated:YES completion:nil];
[readerController release];
Calling [self presentViewController:messageController animated:YES completion:nil]; doesn't necessarily use the vc you call this on to present the other vc. By default it travels up the vc-hierarchy and presents the other vc on the root view controller. That's why in your case the presenting view controller is a UINavigationController.
If you want to force your MainViewController to be the presenting vc, you have call:
[self setDefinesPresentationContext:YES];
on your MainViewController before presenting the MessageViewController.
Edit: In case someone else reads this: definesPresentationContext seems to be bugged or the documentation is wrong. See the comments below and Cocoa Builder
copy of my answer from this question
from Programming iOS 6, by Matt Neuburg:
On the iPad, when the presented view controller’s modalPresentationStyle is UIModalPresentationCurrentContext, a decision has to be made as to what view controller should be the presented view controller’s presentingViewController. This will determine what view will be replaced by the presented view controller’s view. This decision involves another UIViewController property, definesPresentationContext (a BOOL). Starting with the view controller to which presentViewController:animated:completion: was sent, we walk up the chain of parent view controllers, looking for one whose definesPresentationContext property is YES. If we find one, that’s the one; it will be the presentingViewController, and its view will be replaced by the presented view controller’s view. If we don’t find one, things work as if the presented view controller’s modalPresentationStyle had been UIModalPresentationFullScreen.
TL;DR
1. set definesPresentationContext to true on the desired presentingViewController
2. set modalPresentationStyle to UIModalPresentationCurrentContext on the desired presentedViewController
If seems that you need to set three thing in iOS 11.
controller.modalPresentationStyle = UIModalPresentationCurrentContext;
controller.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
self.definesPresentationContext = YES;
[self presentViewController:controller animated:YES completion:nil];
Related
I have an app that uses only xibs, no storyboards.
I have created a prompt xib that I would like to present modally (with the modal animation) from a table view controller xib (named TVC.xib) The TVC is nested in a navigation controller.
I can get the prompt to present itself, but I want it to present itself with a modal animation. Unfortunately, the presentModalViewController has been deprecated. What is the current option to present a view controller modally in code and have it animate the same way that modal presentations used to animate?
Here is my code: (in the TVC.m)
PromptViewController *promptVC = [[PromptViewController alloc] initWithNibName:#"PromptXib" bundle:nil];
UINavigationController *navVC = [[UINavigationController alloc] initWithRootViewController:promptVC];
[self.navigationController presentViewController:navVC animated:YES completion:^{
NSLog(#"presented prompt vc");
}];
Ideally I could replace the method in the 3rd line with self.navigationController presentMODALViewController... etc, but it's deprecated.
You are looking for:
[self presentViewController:aViewController animated:animated completion:^{}];
But you should browse some tutorials to update the knowledge.
I've figured it out. I needed to set the transition style and presentation style on the view controller that I wanted to show. Here is my solution:
PromptViewController *promptVC = [[PromptViewController alloc] initWithNibName:#"PromptXib" bundle:nil];
promptVC.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
promptVC.modalPresentationStyle = UIModalPresentationFullScreen;
[self presentViewController:promptVC animated:YES completion:nil];
I am trying to switch to different ViewController on same storyboard like so:
CalendarViewController *CalViewController = [[CalendarViewController alloc] init];
[self presentViewController:CalViewController animated:NO completion:nil];
When I run this action, corresponding implementation file executes NSLog message but screen goes black with no errors being displayed.
How do I fix this?
Let's suppose you created your CalendarViewController interface in a storyboard, and you assigned it the identifier "ControllerIdentifier".
If you want to load it from inside another View Controller, you can instantiate your CalendarViewController and present it like this:
CalendarViewController *calViewController = (CalendarViewController *)[self.storyboard instantiateViewControllerWithIdentifier:#"ControllerIdentifier"]
[self presentViewController:calViewController animated:NO completion:nil];
You can use Segue to push calViewController.
You can use the code below;
CalendarViewController *CalViewController = (CalendarViewController *)[self.storyboard instantiateViewControllerWithIdentifier:#"CalendarViewControllerIdentifier"];
[self presentViewController:CalViewController animated:NO completion:nil];
But if you choose the second option, you have to set CalendarViewController's Storyboard Identifier to CalendarViewControllerIdentifier from your storyboard.
i have a UIViewController with UITableView, when the tableView is empty i want to show another view so i am using this
[self.tableView setHidden:YES];
NoKidsViewController *noKids = [self.storyboard instantiateViewControllerWithIdentifier:#"NoKidsView"];
[self.view addSubview:noKids.view];
all is fine, i'm able to see the view. but when i tap on one of the buttons in it i'm getting the EXC_BAD_ACCESS EXC_I386_GPFLT error.
//NoKidsViewController
- (IBAction)addNewKid:(id)sender {
AddKid *addKidController = [self.storyboard instantiateViewControllerWithIdentifier:#"AddKid"];
[self.navigationController pushViewController:addKidController animated:YES];
}
- (IBAction)saleSpot:(id)sender {
SaleSpot *saleSpotController = [self.storyboard instantiateViewControllerWithIdentifier:#"AddKid"];
[self.navigationController pushViewController:saleSpotController animated:YES];
}
i searched the net over 3 hours trying to find any solution w/o success. what could cause that error? and how can i fix it?
The noKids controller is going out of scope and being deallocated. This is what is often referred to as a zombie object.
You need to add the noKids controller to the childViewControllers of the containing controller.
NoKidsViewController *noKids = [self.storyboard instantiateViewControllerWithIdentifier:#"NoKidsView"];
[self addChildViewController:noKids];
[self.view addSubview:noKids.view];
[noKids didMoveToParentViewController:self];
This will retain the NoKidsViewController as well as allow the view controller methods to pass down to it. For more information on creating your custom container view controller:
https://developer.apple.com/library/ios/featuredarticles/ViewControllerPGforiPhoneOS/CreatingCustomContainerViewControllers/CreatingCustomContainerViewControllers.html
I'm building an app that currently has 3 ViewControllers. One of them is used after a successful login so is not relevant in this question.
I'm using a mixture of Storyboards and building things programmatically when I find Storyboards do not give me the fine control that I need.
The first ViewController is built in my 'MainStoryboard'. It has a login form and an info button at the bottom. I link it up the my AppDelegate by doing the following inside didFinishLaunchingWithOptions:
ViewController *viewController = (ViewController *)self.window.rootViewController;
Because I wanted to force rendering of a UIWebView (another story) I create the second view programmatically. I do the following inside didFinishLaunchingWithOptions:
infoViewController = [[InfoViewController alloc] init];
[infoViewController view];
Inside both of my ViewControllers I setup a link to appDelegate as below:
appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
I have an info button in my first ViewController that takes you to the infoViewController. It calls the following code when tapped:
appDelegate.infoViewController.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:appDelegate.infoViewController animated:YES];
The above works just fine for me, flips over the screen and shows the InfoViewController.
On my InfoViewController I have a button that should take you back to the login page, I have tried all sorts to get this to work but it just crashes my app. Nothing seems to work. I have tried the following:
appDelegate.viewController.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:appDelegate.viewController animated:YES];
and
[self.navigationController popToRootViewControllerAnimated:YES];
and
[self.navigationController popViewControllerAnimated:YES];
and
[self.navigationController popToViewController:appDelegate.viewController animated:YES];
I suspect the last 3 might be more to do with when you have a navigation view controller and you want to go back to the root? I'm not sure, but either way it does not work. I had this working using storyboards previously so I'm sure it ought to be easy! As mentioned I switched to making the infoViewController programmatically so that I could force the UIWebView to render before the view appeared.
Any help much appreciated.
You can do with:
[self dismissModalViewControllerAnimated:YES];
You should use this.
[self dismissModalViewControllerAnimated:YES];
You should use a main controller for switching between your other view controllers. Change the view of your root controller to one of your other view controllers (apply animations as usual if needed). Hold a pointer to your root controller in your other view controllers and call self.rootController.view = <desired_controller_instance>.view
I think the way you're presenting your InfoViewController is wrong. Do it the following way:
In your ViewController, create an action for the info button.:
- (IBAction)infoButtonTapped:(id)sender
{
InfoViewController *infoViewController = [[InfoViewController alloc] init];
infoViewController.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
[self presentModalViewController:infoViewController animated:YES];
}
And in your InfoViewController, in the action of your button that should take you back write this:
- (void)takeBackToViewController
{
[self dismissModalViewControllerAnimated:YES];
}
Hope it works.
Also in presented controller you can use this
if(self.parentViewController)
[self.parentViewController dismissModalViewControllerAnimated:YES];
else
[self.presentingViewController dismissModalViewControllerAnimated:YES];
To dissmiss current controller.
The following code should work, right?
ViewController2 *childView = [[ViewController2 alloc] initWithNibName:#"ViewController2" bundle:nil];
[self.navigationController pushViewController:childView animated:YES];
[childView release];
It doesn't do anything though. There are no error messages. The view just doesn't get switched. viewDidLoad does not even execute inside ViewController2.
That code won't do anything if the view controller presenting it doesn't have a navigation controller, i.e. it isn't in a navigation controller stack. In that case, you'll be calling a method (pushViewController:animated:) on a nil object (self.navigationController) which does nothing. Thus, you can only use this this method if the "parent" view controller is in a UINavigationController stack.
Use this:
[self presentModalViewController:viewControllerNameHere animated:YES];