Instagram has the following UITabbarController:
It has a special behavior which I couldn't duplicate. Every TabbarItem behaves like every other one but the center one doesn't show simply a viewcontroller but presents one instead. I would like to know how to do that.
I was thinking that they use a Toolbar with custom buttons but I feel like it's a bad practice. On every tab we have to allocate the view controllers. This behavior unfortunately resets the state of the view controller after a switch to another controller.
I would love to get a solution where I can use a UITabbarController but present one of the view controllers.
Related
I just got into Swift programming lately and I have an easy question I can't answer.
I understood that we start putting a ViewController to show something, then if I want to display another view I can use a segue linked to another view. But I don't like the fact that the view called by the segue doesn't take the full screen. It just looks like a pop-up screen.
So, how could I switch from a ViewController to another ViewController or NavigationController or whatever that keep the fullscreen view.
How could I change my view without passing through a segue and get the following view like a pop-up ?
Hope my wonder is clear enough to be answered :D
Thanks a lot to the community !!!
You can make your segue's presentation style as fullscreen. But if you want to use UINavigationController, first you need to embed your ViewController in UINavigationController(rootViewController: ViewController()). After that you can navigate to another ViewController using pushViewController method.
When you use UINavigationController, it will stack on top of each other. When you use popViewController, the current ViewController will be popped off from the stack. That's how works in general.
Difference between navigation controller and viewcontroller?
I mean how can we decide when to use navigation controller or a normal view controller?
Just my two cents:
A UIViewController represents a single view and you can put buttons in this view controller to segue to another UIViewController. If you want to segue back to the first UIViewController, you will have to worry about putting a button in the second view controller that leads back to the first. If you are drilling down into view controllers, this can be tedious having to remember to give the user a way back to a previous view controller.
A UINavigationController does a lot of this tedious work for you. As mentioned, it contains a stack of UIViewControllers. It will create a navigation bar at the top that will allow you to easily go back up the hierarchy of view controllers.
In short, if you have a hierarchy of view controllers that you want the user to easily navigate around, inbed your UIViewControllers into a UINavigation controller.
UINavigation Controller is a combination of 2 or more view controllers,those are connected through "segue" feature of "Ios". Benefit of using Navigation Controller is that we can navigate between different screens easily with default "Back" button on each screen . We don't need to give any individual button to move back onto previous screen.
Whereas a ViewController provides a single screen & we can connect more screen using "segue" but we also have to design a "Back" button to navigate onto previous screen.
We should use Navigation Controller , in case where one option resides into another one.Like in an iPhone settings ->Mobile Data Options->Voice->4G or 3G or 2G. It's a hierarchy of menus so here navigation Controller is better option than using UIController.
We should use UiController with "segue " , in case where
we have to choose one option among multiple.Like -
Photos ->There are many folders in which , any one is selected, that are Favourites or People or Places .
Here's a very brief, high-level overview.
Whereas a UIViewController can be thought of as representing a single 'screen', UINavigationController, as the name implies, is used as a means of being able to navigate multiple 'screens'.
From the documentation:
The UINavigationController class implements a specialized view controller that manages the navigation of hierarchical content. This navigation interface makes it possible to present your data efficiently and makes it easier for the user to navigate that content. You generally use this class as-is but in iOS 6 and later you may subclass to customize the class behavior.
Please see the rest of the UINavigationController documentation here: https://developer.apple.com/library/ios/documentation/UIKit/Reference/UINavigationController_Class/index.html
Okay, Thank you everyone for helping me to find out a clear answer on this.
Navigation Controller consists of navigation bar and tool bar to move in and out from view controllers present in navigation stack.Therefore there can be many view controllers in Navigation Controller.
In view controller we don't have this facility and it represents a single screen view.
Please correct me If I am wrong.
See the Navigation Controller discussion in the View Controller Catalog.
Bottom line, a navigation controller actually is a view controller, but it just happens to be one that presents and navigates between other view controllers.
i'm curious about what's the best way to plan the controllers for my app.
i want my main screen to have 3 button.
1) should open a nav controller with details view
2) should open a controller with other buttons that lead to others controllers
3) should open a tab bar with 2 pages ( or eventually use a switch to change page instead of the tab bar)
this is the schema of what i want
http://i59.tinypic.com/2rrvrd4.png
Is it a correct schema or i should use my controllers differently? will apple reject an apple with such schema?
thanks
As #Fogmeister pointed out in the comments, going for a UITabBarController as the main interface for your app actually seems to be a more appropriate solution here.
However, you can go with the interface that you described, but then you should keep in mind that with your current setup, you are not only using UINavigationController in the first case, but your whole navigation system is still built upon UINavigationController in the following way:
Your app has one instance of UINavigationController.
Your initial UIViewController (the one with the three buttons), is the rootViewController of your UINavigationController.
You can navigate to the other view controllers using [self.navigationController pushViewController:newViewController] (or performSegue if you prefer using Storyboards).
In the case of your third view controller, you are pushing a UITabBarController onto the navigation controller's view controller stack, this UITabBarController needs to be initialized with the two view controllers that it is going to display before it gets pushed onto the stack.
I have a UIAlertView. When the user taps a button in the alert view I want to show a new UIViewController.
In order to achieve this I need to know which view controller is currently visible on screen because that particular view controller is the right one to present the new view controller.
The problem is that I have a complex hierarchy of view controllers in my app including a UINavigationController and a UITabBarController (among others). So I cannot simply use self.visibleViewController to get the currently visible view controller.
I have found a possible solution on Stackoverflow but I would like to find a neater solution without having to dig through the whole view controller stack.
UINavigationController has a property called topViewController.
Maybe it helps you.
I make my first "serious" iOS app, and have some troubles with the whole UINavigation concept, but all in order. I look answers for my questions but don't find what I want, so here it is.
I want to make menu to a game, it would be look like so:
1) It's a RootViewController and it contain some buttons: new game, options, about.
2) I think it will be another view controller (It must appear when we touch new game button, and we see a menu when we choose game difficulty) the buttons is: easy, medium, hard
3) The game view controller (I think that this VC won't be the part of UINavigationController).
I have some concepts that I want to embody in this menu.
Here is it: I don't want to use UINavigationController Navigation bar, I won't use standard slide animation for UINavCon, I want to make my buttons "move to transparency" and come back with another menu from paragraph 2 mentioned above, it's not necessarily to change background or something else except menu items.
I want to use custom back button, and want to add it to the position I want and not to Navigation Bar.
I have some ideas about animation of menu items.
I don't know this:
It is better to use UINavigationController for my purposes or it's better to use normal ViewController?
If I make a UINavigationController can I see it's "child VCs (I mean not a root VC)" in my storyboard or it will be programmatically created thing and I must make it UI in code? If i must do this programmatically, could I make a segue from UINavigationController from storyboard, or I must do this from code too?
Could I make a UIButton, for example, and assign it functions from a normal UINavigationController back button from Navigation Bar?
Some questions might be dumb, but hope you won't judge me hard.
Okay, I'll do my best:
For custom animations, see
Yes, you make a custom segue class with the animation. try: joris.kluivers.nl/blog/2013/01/15/… and developer.apple.com/library/ios/#featuredarticles/… and cmumobileapps.com/2011/11/04/a-short-tutorial-on-custom-segues
Yes, i think a view controller is your best bet. But by the way, even if you use a navigation controller, you still use normal view controllers. A UINavigationController holds different UIViews, which go forward and backward on the navigation stack. Also, you will need to look up what you need to do to hide the navigation controller.
You can see the child view controllers in a storyboard if you create them their, but not if they are created programmatically, unless you just have the view in their.
[self.navigationController popViewControllerAnimated:YES] will "press the back button" programmatically, so just link the custom back button to a method that calls this.
If that doesn't cover all of your questions, just comment and I'll answer any more :)