I'm running into trouble with what I think is a pretty basic task. Within peoplePickerNavigationController:peoplePicker:shouldContinueAfterSelectingPerson: i want to show my own view rather than the standard person view. I'm using a Storyboard, but don't think I can simply manually segue to a window here so I'm thinking I need to create a new XIB with a View Controller in it. I'm setting the Class of the View Controller to my custom View Controller in IB. Then in peoplePickerNavigationController:peoplePicker:shouldContinueAfterSelectingPerson: I'm doing:
MyVC *myVC = [[MyVc alloc] initWithNibName:#"XIBFileName" bundle:nil];
[self presentModalViewController:myVC animated:YES];
In my View Controller initWithNibName gets called, but not viewDidLoad. What am I doing wrong here?
Just try [peoplePickerVC presentModalViewController:myVC] instead of presenting from self.
The issue is that the peoplepickerviewcontroller will be in the top of the navigation stack. Becuase you wud've presented the peoplepicker from self. As this is the case, you wont be able to present/push from self as its not at the top of the navigation stack.
Otherwise once the peoplepicker has been poped, then you can further present from self.
Related
Ok, first let's name things:
I have a table view in my root view controller wich we'll call "HomeViewController". In that table view each cell tap will push a different view controller. This collection of view controllers we'll call "DetailViewControllers".
I am perfecly aware that I can make this work by simply loading and pushing each of the DetailViewControllers programmatically inside the didSelectRowAtIndexPath method. I want to do something different instead using storyboard and a prototype cell and I'm not succeeding, so I'm looking for some advice since I'm not too well versed in storyboards and segues.
The behavior I'm trying to achieve here is:
I'll have a segue from a prototype cell in the table view in my HomeViewController. That segue pushes a "base" view controller, from which every DetailViewController inherits. These view controllers don't have an assigned view controller in the storyboard either.
In the prepareForSegue method I want to cast the 'destinationViewController' to the 'right' class. The app crashes at that point saying it "Could not cast value of type 'BaseTestViewController' to 'TestViewController'.". Which is totally understandable.
So, my question is: is there a way to make a segue work like that?
You can't create segues programatically. Segues don't exist without a storyboard. You can just push to a view controller via loading a nib file.
Here's how you do it.
Let's say you have a nib file containing the layout of the view for the main view of your view controller. We'll name it "Test" for instance.
Go to that nib file, click file's owner.
Change class to the name of your view controller. In my case, I named it ViewController.
Right click on file's owner. Link the outlet of view of your view controller to the view in the nib file.
Then in the view controller where you want to transition to that view controller, you do it like this:
UIViewController *controller = [[UIViewController alloc] initWithNibName:#"Test" bundle:[NSBundle mainBundle]];
[self presentViewController:controller animated:YES completion:nil];
It will present the view controller modally.
If you are embedding a navigation controller then you can do it like this:
[self.navigationController pushViewController:controller animated:YES];
Hope it helps.
Try like this without storyboard segue.
let objDestVC = self.storyboard.instantiateViewControllerWithIdentifier("DestVCStroyboardId") as! DestinationViewController
self.navigationController?.pushViewController(objDestVC, animated: true)
Please see the following attached image for more understanding.
The scenario is : I have five view controllers
Each view navigate to next viewController on push
Now the MidContainerViewController has got the Container which embeds the FirstViewController.
Bottom of MidContainerViewController is a static view which should not change while navigating further.
On navigation The FirstViewController should be of size equal to container
Also when I navigate to SecondViewController from FirstViewController, it should also be of size of Container.
Objective 1 : 'FirstViewController' and 'SecondViewController' should not take whole screen overlapping the bottomView image on MidContainerViewController.
Objective 2 : I must pop to root "View Controller" on last 'push' on SecondViewController.
Solutions :
1) Currently As I have embedding the root "View Controller" to navigationController. No problem with objective 2. It successfully navigates back to root. But can't achieve objective 1
2) If I embed the "First View Controller" too with navigationController the objective 1 is achieved but start facing problem for objective 2. It pop back till 'MidContainerViewController' only.
Any suggestion are highly appreciated.
Thanks,
Assuming your are manually handling push/pop events without using storyboard, I recommend you to not push the FirstViewController from MidContainerViewController. Add the next view controller as child view controller through following code:
FirstViewController *firstViewController = [[FirstViewController alloc] initWithNibName:#"FirstViewController" bundle:[NSBundle mainBundle]];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:firstViewController];
[self addChildViewController:navController];
[navController.view setFrame:CGRectMake(0.0f, 0.0f, _containerView.frame.size.width, _containerView.frame.size.height)];
[_containerView addSubview:navController.view];
[navController didMoveToParentViewController:self];
From the above code you'll achieve your first objective. In the above code, the FirstViewController gets initiated on its own separate navigation controller object, so it will have different navigation stack. So if you further push and pop from FirstViewController & SecondViewController, your view will not take the whole screen. But if you call popToRootViewController from last view controller, your root view controller would be FirstViewController in that specific container view.
To achieve second objective, you'll have to create a public property to contain reference of main navigation controller object in your AppDelegate class. Create your root view controller from that navigation controller object. In your last view controller, you'll then have to get reference of that navigation controller property from your AppDelagate class and then call popToRootViewController from that object.
i think you must present your root view controller from the secondView Controller rather that embedding to root view controller.
Thank you everyone.
The problem is solved and both the objectives are achieved.
I kept only one navigation controller as root view controller.
I created one customContainerViewController.
This class has instances of all the children it is supposed to show.
This class acts as delegate for each of its childViewController. Make customContainerViewController as deleagte of each childViewController.
I updated the chilren using delegation method and using UIView transition method in UIKit.
This worked for me.
I perform some data loading tasks from an Ojective§C class and once everything is loaded, I simply wants to display a Viewcontroller subclass prepared in a storyboard.
So when everything is ok, the following method is called:
- (void)loadingNextView
{
CABBndGSite *mySite = [CABBndGSite alloc];
CABBndGSelectLanguageViewController *vc = [[mySite myRootViewController].storyboard instantiateViewControllerWithIdentifier:#"SelectLanguageViewController"];
[[mySite myRootViewController] presentViewController:vc animated:YES completion:nil];
}
So I verified that myRootViewController is not nil. It's a UINavigationController class.
vc is not nil so it found my view in the storyboard.
Anyway, the presentViewcontroller message seems to doing what expected.
Certainly a stupid mistake but my poor iOS programming knowledge lets me in the fog!
I use this code from ViewController subclasses with success and as here I get a valid ViewController pointer, I don't understand why it doesn't work.
I also tried to implement the AppDelegate method explained here How to launch a ViewController from a Non ViewController class? but I get a nil navigation pointer. Maybe something not well connected in my application
May I have some explanation?
Kind regards,
UINavigationController maintains a stack of view controllers. You can access this stack through the viewControllers property. To present your view controller, you can:
(a) have the navigation controller push the new view controller on to
the stack (pushViewController:animated:);
(b) have the top view controller in the view controller stack present
the new view controller modally (presentViewController:animated:completion:), or;
(c) add the new view controller to the view controller stack array
manually by assigning a new viewControllers array to the navigation
controller's viewControllers property (setViewControllers:).
Hi I'm trying navigate to view controller form the navigation view controller with connect using the objects
i want to do by programmatically but its not working its showing the black screen. Please tell me how to resolve this.
- (IBAction)reg:(id)sender {
pollpoliticalViewController *vc2 = [[pollpoliticalViewController alloc] init];
[self.navigationController pushViewController:vc2 animated:YES];
}
The above code i have used to navigate but its giving black color screen its not showing the view controller please tell me where I'm doing wrong.
Thanks.
Nothing is wrong with the above code.
As I understand what you are doing, you have a view controller class called pollpoliticalViewController. My first suggestion would be for you to look into the accepted coding style in Objective-C. You should always capitalise classes. In this instance the class should have been called 'PollPoliticalViewController`. Obviously this is not the source of the problem though.
The problem will be with the view controller itself. In the code for pollpoliticalViewController you are doing something wrong which is not displaying the view.
The view controller may actually be styled inside of a .xib file, in which case you should be initialising the view controller like this:
pollpoliticalViewController *pollVC = [[pollpoliticalViewController alloc] initWithNibName:#"pollpoliticalViewController" bundle:nil];
If the view controller is defined inside of a storyboard, you will have to give the view controller a 'Storyboard ID', for example; 'PollPoliticalVCID'. You then need to initialise it like this (assuming your storyboard is called "MainStoryboard":
pollpoliticalViewController *pollVC = [[UIStoryboard storyboardWithName:#"MainStoryboard" bundle:nil] instantiateViewControllerWithIdentifier:#"PollPoliticalVCID"];
EDIT
The storyboard name is found when you open the storyboard, do not select any view controller. Open the Utilities side bar (on the right side of Xcode), select the first item, and you can find the name under Identity and Type. I have included an image.
I have relatively complex ui appearing in a popover (complex enough that doing all the layout and relationships from code would be a pain), but the button that calls it is created and placed into the parent view (which exists in the storyboard) from code.
I've tried making a popover segue from the parent view's viewcontroller object to the popover content vc, then triggering this with performSegueWithIdentifier. This almost works, but I can't figure out how to set the popOver's Anchor from code so it appears at the wrong place (squished at the bottom of the screen).
Is there a way to set the popOver segue's Anchor dynamically?
or
Can i create a UIPopOverController object and get the view i've put together in the storyboard into it?
or
Is there some other obvious way to do this that I'm not seeing?
please be gentle, I'm new here.
iPad iOS5.1 XCode4.3.2
Alex,
I'm not completely sure I understand what you're trying to do, but let me take a stab at it from what I think I understand.
For the same reason you cite (view complexity, etc.), I often build out my views in the storyboard and then load them from some action. What you can do is instantiate the view controller by identifier with something like this:
FancyViewController *controller = [[self storyboard]
instantiateViewControllerWithIdentifier:#"FancyViewController"];
This assumes you have created a UIViewController subclass called FancyViewController and have set the type for your view controller in the storyboard.
Now, you can display the view controller in a popover controller or you can push it onto a navigation stack. You just need to make sure you've set the identifier for your view controller in the storyboard.
Also, you'll probably want to instantiate your view controller once if you use a popover controller and just update the view controllers properties each time the action gets triggered. So, if it's tapping a button that triggers the popover, your code might look like this:
- (IBAction)didTapButtonToShowFancyViewController:(id)sender
{
if (![self fancyViewController])
{
// fancyViewContrller is a property of type FancyViewController *
fancyViewController = [[[self storyboard]
instantiateViewControllerWithIdentifier:#"FancyViewController"];
// fancyViewPopoverController is also a property
fancyViewPopoverController = [[UIPopoverController alloc]
initWithContentViewController:fancyViewController];
}
// Perform setup on the fancy controller you want to do every
// time the action gets triggered here. Do initialization in the if
// block above.
// Now display the popover from the sender's frame. I'm assuming the
// sender is a UIButton.
[fancyViewPopoverController presentPopoverFromRect:[sender valueForKey:#"frame"]
inView:[self view]
permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}
The only way to set the popover's "anchor" dynamically is to use an explicit action that calls presentPopoverFromRect:permittedArrowDirections:animated: instead of a segue.
I hope that helps. Let me know if I've misunderstood what you're trying to do.
Best regards.