I have two subviews that load. One is a tabbar thats inside a viewcontroller which gets loaded fairly early on and the second is a view that appears when a tab bar item is pressed.
however when this subview is added it loads over the tabbar subview.. is there a way to bring to front or something along those lines?
There is a whole plethora of methods to choose from...see the section Managing the View Hierarchy in the UIView docs
Related
I am currently developing as app for iPad. And I need to create a tabbar. The problem is that, for design purposes, I need the tabbar to be on the top half of the screen and not on the bottom as it is on the default tabbar controller.
Once the tabbar is on top I want that when a button is touched, the subview bellow the tab is changed. Furthermore, the subview that should be loaded was alson designed inside the storyboard. The following sketch shows what I want it to look like:
On my research I found a solution (here) for putting the tabbar on top. Now my problem is on loading a subview bellow it.
I tried it with [self.view addsubview:theNameOfTheViewCreatedINStoryboad.view] but the application simply hangs when I press the button.
I think that is because I am not specifying anywhere what should be the dimension of the new view or where on the scree should it be placed. The reason for that is because I do not know where it should be done.
Can anyone give me some lights on this matter? Is the referred approach the best one for putting a tabbar on top? How can I solve the subview problem?
Glad to see you are using a toolBar and not a tabBar. Even better would be to create a custom content view controller.
You should be looking into using containment:
UIViewController containment
How does View Controller Containment work in iOS 5?
positioning UIViewController containment children
check out the docs
I'm making an app with interface builder using storyboarding.
I want to have a tab bar where no item is selected. This can be accomplished by setting
TabBar.SelectedItem = null;
But if you try to do that, you get the following error:
'Directly modifying a tab bar managed by a tab bar controller is not allowed.'
So I can't use the standard UITabBarController. I've created a custom UIViewController, and added a UITabBar. Switching between tabs is working fine, and having no selection is also working as it should.
But I have no idea how to show my other view controllers from my custom view controller with the tab bar. Remember that I'm using interfacebuilder, so I can't just create my view controllers in code as new objects and add them to the view. (as suggested in UITabBar funcionality without UITabBarController)
So how do I show my own views without using the UITabBarViewController?
Edit: Still haven't found a solution, but I did a hacky fix. Simple create an other tab bar and place it on top of the original tab bar. Listen to those events and use SelectedIndex to change the view displayed. Then add some function that will select / deselect the items on your own tab bar.
In fact, even if you design your others UIViewControllers from IB, you can instantiate them from code. You'll probably have to play a bit with frame and autoresizing properties to make them fit the part of your main view you want them to display inside, but it's possible.
So, knowing that, a simple solution is to create a simple UIView (we'll call it 'tabFrame') in your main UIViewController, which fill the screen from the top of your UITabBar to the top of the screen; instantiate the UIViewController corresponding to your tabs and add their view as subview of tabFrame. Now you just have to catch item selection from tabbar to hide or show the desired subviews.
Hope I'm clear enough, else don't hesitate to question!
EDIT: pointed out this morning that in storyboarding context, you can effectively instantiate viewControllers / scene from code, but for not loosing designer settings it must NOT be done through directly calling their constructors, but through StoryBoard.InstantiateViewController("vc_identifier") calls, after having set identifiers to VCs in storyboard editor.
See http://docs.xamarin.com/ios/recipes/General/Storyboard/Storyboard_a_TableView for example
I have a UINavigationController App. I want to add a small bar just below the UINavigationBar, around 20px height. y application is almost finished, so I want to rebuild as less code as possible. For example, if I wanted to add a button in the bottom of every view of my application, I can do that by extending UIViewController with a category, and adding a UIButton as a subview of the current controller view, maybe in the viewDidLoad method.
This approach works fine, and so I can add my UILabel to all my views at the top of them. The problem is that it does not TAKE SPACE. It is always on top of my previous views (UITableView...). What is the best way (or just one way) to accomplish such a thing without having to create for example a view with 2 frames, and having all my main views extending it?
I thought of changing UINavigationBar height, but that is definitely not an option.The prompt property of UINabivationBar is just to big (around 30px).
I also tried to create a new view in the viewWillAppear method of every UIViewController, adding to that view my breadcrumb subview, and the original view, but it is not working.
Any ideas on this?
Thank you!
If I were you, I'd make a new UIView subclass to represent this thing, and embed it on the views of the individual UIViewControllers. They can get at the navigation stack by looking at the UINavigationController's .navigationControllers array, walk that and get view titles, etc.
I'd like to display some small tutorial dialogs on top of my exiting views. I want to be able to see my existing views behind these smaller views.
Do I have to use view controllers in the same I way I would me normal views, and presentmodalviewcontroller etc ?
I haven't tried making a smaller view in interface builder before.
Also, say I want to move to another one of my existing views, full screen, while in my tutorial view. How would I close my tutorial view move to the next full screen view and launch another tutorial view ?
Example code or pseudo code would be welcome.
If your tutorial dialogs are just text, you could use UIAlertView to show the information to the user, so they can just read it and click the OK button when they're done. It's a very easy way to show some text to the user.
If you need to include images or other interactive items in your tutorial dialogs, the easiest way might be for you to just have your fullscreen view's view controller create a new view and put it up. So in this case, you'd create your view in Interface Builder, and when you want to show it, instantiate it using -[UIBundle loadNibNamed:owner:options:] and add it as a subview of your main view. Of course, it may even be easier to create the tutorial view programmatically from your view controller rather than using a nib for them at all.
Regarding the question of moving on to another fullscreen view, you would probably want to look into embedding your view controllers in a UINavigationController. This would allow you to push from the first controller to the second very easily, and the user would be able to just tap the Back button to get back to the first. If you're not looking for a navigation bar type of interface, you could present the second view controller as a modal view controller by calling -[UIViewController presentModalViewController:animated:] on your main view controller. This will pop up the second view controller fullscreen, and the user can dismiss it when they're done. Check out Apple's great documentation on UINavigationController to get a feel for how to use that:
http://developer.apple.com/library/ios/#featuredarticles/ViewControllerPGforiPhoneOS/NavigationControllers/NavigationControllers.html%23//apple_ref/doc/uid/TP40007457-CH103-SW1
I would think that you could use existing UIViewController and simply add a new UIView that is of desired dimensions, that sits in front of other views and which is non-opaque and has alpha less than 1.
If you want a general purpose tutorial mechanism that can be placed atop any one of many UIViewControllers, then you would want to extract the navigation logic, etc.
Sorry, no code - just a few quick thoughts.
I posted earlier but am running into similar problems again. Basically the way that my app is setup there is a top bar that is basically just a static image that has UIButtons placed on top of it. That is the Main View Controller and is persistent no matter what view is shown beneath it. I can't use a navigation controller because it is not possible to change the height and I need the bar to be significantly larger than a navbar. However my bar is functioning in much the same way. There is a "Home" Button, a "Back" Button and several destination buttons.
I understand how to switch views from say the home screen. My confusion comes with the back button. In order to press back the app is going to need to know what view is currently being displayed so that it can be removed from view and a new subview can be added. Ideally I would use the UINavigationController so that I can push and pop views which is really what I want to do here, however that is not possible because of the visual problem.
Does anybody know of a method that returns the current displayed view so I could do something like the following
[currentview.view removeFromSuperView];
[self.view insertSubview:experienceViewController.view atIndex:0]
You can use UINavigationController with the nav bar hidden. Put the nav controller inside a view that does have your jumbo toolbar and you'll have access to the push/pop behavior you're looking for.