i am testing all day on this but i can not get it to work.
I have my main App Delegate class with my MainWindow.xib.
In this main class i create my navigation controller and MainWindow points to my MainViewController.xib. In this MainViewController i have a simple tableview, where i push some views on the navigation stack.
Till here it's working great.
But i want the user to switch between two styles of presenting him data.
One is the tableview, and the other option is something like a map. Doesn't matter. Just 2 different Views. So i thought of using a button on my nav bar to flip between these two views.
Don't get this subview flip to work.
I tried it with that source but didn't get it to work.
Some hints would be great!
Suppose you have all the navBar, buttons ready. You can use modal view for the solution:
-(void)changeView{
//create some view
[youNewView setModalTransitionStyle:UIModalTransitionStyleFlipHorizontal];
[self presentModalViewController:youNewView animated:YES];
}
You can use the above method to flip to a new view.
-(void) dismissView{
[self dismissModalViewControllerAnimated:YES];
}
and use the second method in the new view to flip back.
I like this method a lot because you don't need to add any controller manually at all.
Related
I have a main navigation controller with a root view controller. In the root view controller, on the push of a button I present second view controller like this:
SecondVC *secondVC = [[SecondVC alloc] initWithNibName:#"SecondVC" bundle:nil];
[self.navigationController presentModalViewController:secondVC animated:YES];
In the second view controller, on the push of an other button, I want to present a third view controller (this time from a Storyboard):
ThirdVC *thirdVC = [[UIStoryboard storyboardWithName:#"Settings" bundle:nil] instantiateInitialViewController];
[self.navigationController presentModalViewController:thirdVC animated:YES];
However this doesn't do anything. I debugged and it turned out, that self.navigationController is nil.
Shouldn't it be the main navigation controller? Or doesn't presentModalViewController: add the view controller to the stack? Do I always have to put a view controller in a navigation controller before presenting id modally?
The new view controller SecondVC is being presented modally, and it's not added to the view controller stack of the navigationController. You need to create a new UINavigationController, and put SecondVC inside the navController before presenting it modally.
You'll need to add something like:
UINavigationController *navControl = [[UINavigationController alloc] initWithRootViewController:secondVC];
[self addChildViewController:navController];
[self.navigationController presentModalViewController:secondVC animated:<#(BOOL)#>]
your view controller while being presented is not inside a navigation controller. And will not have access to the presenting controllers navigation controller.
Furthermore if you push or pop stack items on the navigation controller beneath the modal view controller you will likely not notice anything.
If you want to put the controller in the stack you can alternatively show the view controller yourself.
[self.view addSubView:myViewController.view]
myViewController.view.frame = self.view.bounds;
and to dismiss the view controller you would simply remove it from its superview.
the drawback here is that some of the did and will appear methods are not called on the view controller. Therefore you may want to call them yourself.
But the principal is much the same. And you can easily simulate the presenting animation with the animation system.
Give it a starting point below your form, then start your animation block and put the view.frame to superview.bounds also giving it an animation time. I find that 2 seconds is ok. sometimes less.
at this point the presented view is inside the controller which is on the stack. Now while you cant directly modify the navigation controller within the presented view controller you could set a delegate that tells the original your intentions and therefore the presenting view controller (the one on the navigation stack) can push or pop the view controllers as requested. And the presented view controller will be pushed along with it.
Another positive point is that you can do much like other apps do, and present a semi modal view. With a partially transparent background. this way you can show things happening behind the view even tho they dont directly manipulate it.
I have a number of view controllers that I want to navigate; however, I need to implement an intuitive way to move to previous ones. For the button press methods in my view controller custom classes to move forward, I do something like this:
NextViewController *next = [self.storyboard instantiateViewControllerWithId:#"NextViewController"];
[self presentModalViewController:next animated;YES];
With this in mind, how can I return back to previous views?
Why not just use the built in UINavigationController? You can hide the navigation bar and use custom controls to push and pop controllers as you wish
When using modals you simply add a button that links to the action:
-(void)goBack:(id)sender {
[self dismissModalViewControllerAnimated:YES];
}
i am designing an app that has a login screen. it is a UIView with username/password and a button to submit. once the user authenticated successfully, i want to load a new xib file that holds a navigation controller and a navigation bar. below the bar i want to load a tableView and switch between other views as i move along with the programming of it.
what i did is create a new class that inherits from UINavigationController and assembled the xib file to include the navigation controller. i hooked it back up to file's owner and i'm loading the navigation controller modally like this:
myNavController* navVC = [[myNavController alloc] initWithNibName:#"navXibFile" bundle:nil];
[self presentModalViewController:navVC animated:YES];
[navVC release];
this works okay as the navigation controller shows up. however, it shows up with no title, even though i've set one up in IB. moreover, the tableView's delegates are hooked up via IB but i cannot even see empty lines. all i see is an empty navigation bar at the top and blank view (one piece) below it.
thank you for your help.
so i figured it out... first it's a design decision right? is the app being managed by a navigation controller? if so (which is my case), expect the main (first) view, that is a login page, all you need to do is to hide the navigation bar in your ViewdidLoad for the main view:
[self.navigationController setNavigationBarHidden:YES animated:YES];
once the user logs in and you push the next view like this:
MainTableViewController* mainTableVC = [[MainTableViewController alloc]
initWithNibName:#"MainTableViewController" bundle:nil];
[self.navigationController pushViewController:mainTableVC animated:YES];
[mainTableVC release];
and lastly, in the ViewDidLoad of the next view controller:
[self.navigationController setNavigationBarHidden:NO animated:YES];
in case your app needs a navigation controller for a specific section of the app but not all if it, you will need to use the VC to manage this, in a similar way the appDelegate manages the sample navigation based sample app.
i hope this helps anyone struggling with wrapping their minds around the design patterns implemented here.
cheers.
I have a "landing page/view" that I dont want the navigation bar to show, so I turn it off during the viewDidAppear
navigationBarHidden = YES;
When i push a view on the stack and then move it off. the main landing page shows the nav bar then hides it which cause a flicker that I dont want.
is there a way to have the landing page be a UIView or something? When a menu item is touched the app would push a new view on top of the default landing page. It sound like it would be hard to do without having the landing page be a UINavigationController. Any thoguhts?
Try hiding the navigation bar in viewWillAppear, rather than viewDidAppear.
If you don't need to go back to the landing page, use a view controller for the landing page and present it modally from the navigation controller when the application starts.
So you do want to go back to the landing page.
It's hard to accomplish that with UINavigationController. Suppose your are going back to the landing view. While the transition, the old view should have a navigation bar, and the new view (landing page) should not have a navigation bar. UINavigationController does not allow you manually modifying the transition animation. In other words, you cannot animate hiding/unhiding the navigation bar along with push/pop animation (using viewWillAppear doesn't solve the problem).
So what would I do, if I really, really need this?
I would have a rootViewController (of UIViewController), whose view is the only subview of your application window. When your application starts, rootViewController add the landing view as a subview of its view. When the user selects an item there, you create an UINavigationController with the corresponding view controller as its root view controller.
And, using CATransition animation with type of kCATransitionPush and subtype of kCATransitionFromRight, you add the view of the navigation controller as a subview of rootViewController's view.
Then you need a 'back' button for the first view of the navigation controller. In all view controllers that are the first level view controllers of the navigation controller, create a bar button item with a text 'Back', and add it to their navigationItem.leftBarButton property. Set a target-action (probably to the rootViewController) pair for the button.
When the action message fires, use CATransition animation (now with kCATransitionFromLeft subtype), to remove the current navigation controller's view from rootViewController's view.
The transition may not look as perfect as the native UINavigationController, but I believe this is the best you could get.
Actually the way to do this is to implement UINavigationController's delegate method navigationController:willShowViewController:animated. This method is where you should handle hiding and showing your navigation bar so the animation will occur during the push/pop animation.
I came across a method that is simple and works well for me, and is not given here yet. I assume you have a view controller for the main landing page and it is set as root view controller of the navigation controller. Then you should hide/show the navigation bar in the viewWillAppear and viewWillDisappear methods of the main landing page controller:
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[self.navigationController setNavigationBarHidden:YES animated:YES];
}
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
[self.navigationController setNavigationBarHidden:NO animated:YES];
}
Source:
http://www.iosdevnotes.com/2011/03/uinavigationcontroller-tutorial/
I am trying to create a reusable "picker". It is basically like a keypad of a phone. Since I will be using this a lot in my iPhone app, I have been frustrated with trying to make it appear.
It is in its own XIB file and has its own UIViewController subclass as the FileOwner.
However, when I instantiate this with:
MonthPickerViewController *mpvc
= [[MonthPickerViewController alloc] initWithNibName:#"MonthPicker"
bundle:nil];
Nothing happens on the screen. Yet is does fire the -viewWillAppear methods, etc.
So, what am I doing wrong either in code or in InterfaceBuilder that is preventing my view to appear?
Are you pushing the view controller?
[[self navigationController] pushViewController:mpvc animated:YES];
Or are you adding the view controller's view as a subView of your current view?
First, make sure you've hooked everything up right inside Interface Builder. An easy gotcha is to forget to connect the View object up to the view outlet of your UIViewController subclass.
Then, as Adam says, you need to actually display the view. Assuming you're doing this inside the code of another view controller, you'd need something like the following if you just wanted the new view to appear ontop of your current view:
[self.view addSubview:mpvc.view];
Of if you are using a navigation controller to stack views:-
[[self navigationController] pushViewController:mpvc animated:YES];