In a tab bar based app, I add a new UIViewController from tabview1 like this
[self.view addSubview:self.aView.view];
I created the nib for aView in IB. It is a view with a tableview and navigation bar. I have aView and bView, which are nearly the same and added to the parent the same way. The only difference is that aView has two sections in its tableview. Otherwise, the views are laid out the same.
For some reason, aView does not display its navigation bar. It also seems to sit a little higher than bView, since I can see a sliver of the parent view between the tab bar and aView. I've tried to find any differences between these two views that would cause this behavior but can't. What am I overlooking?
Depending on your needs you should be able to create separate nib's for each UIViewController then set each of these nib's to be loaded as the first view controller in each tar of the tabbar, or with the same nib's set these in each bar with:
- (void)setViewControllers:(NSArray *)viewControllers animated:(BOOL)animated
The following info from the Apple docs should help:
http://developer.apple.com/iphone/library/featuredarticles/ViewControllerPGforiPhoneOS/TabBarControllers/TabBarControllers.html#//apple_ref/doc/uid/TP40007457-CH102-SW14
http://developer.apple.com/iphone/library/featuredarticles/ViewControllerPGforiPhoneOS/TabBarControllers/TabBarControllers.html#//apple_ref/doc/uid/TP40007457-CH102-SW15
Related
I'm programmatically creating a UITableViewController class that shows a table view with a simple navigation bar (though without a UINavigationController, as there are no further levels to the table view hierarchy).
Here is the relevant code:
- (void)viewWillAppear:(BOOL)animated {
UINavigationBar *navBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 320.0f, 44.0f)];
[self.tableView addSubview:navBar];
}
However, the navigation bar covers most of the first table view cell, and scrolls with the whole view.
How can I fixate the navigation bar above the table view, and keep it from scrolling through code?
The problem is that you are using UITableViewController. Switch to a standard UIViewController, add the tableview delegate and datasource methods, point the tableview to those methods, and then you do what you want to do. You could also add a UIToolbar in the XIB and create it that way if you wish.
If you really want a navigation bar, then use an NSNavigationView controller.
When you use a navigation controller, it takes care of this for you, but the navigation bar is just another subview. The remedy is to frame your table view relative to the navigation bar.
self.tableView.frame = CGRectMake(0,myNavBar.frame.size.height, 320, self.view.frame.size.height-myNavBar.frame.size.height);
Set the navigation bar's translucent property to NO:
self.navigationController.navigationBar.translucent = NO;
Having a hierarchy of data doesn't really drive whether or not you need to use a UINavigationController. There are three good reasons to go ahead and just use the UINavigationController.
You get the Navigation Bar for free, and the Nav Controller handles setting the proper frame of your root view controller when you set the nav controller's root view controller property to your view controller
If you one day wake up and say, "Hey! I want to add another layer of information to my awesome app!", you don't need to make any changes to the overall design (or, at most, minimal ones).
As my comment to #danh's suggestion implies, you're immune to whatever whacky changes Apple may decide to do with regards to nav bar height.
The solution to this behavior would be to add the UINavigationBar to the Parent View Controller's view:
[self.parentViewController.view addSubview:myNavBar];
Interface builder does not let me click and drag a Navigation Bar onto a Table View Controller!!! It is super frustrating.
All I want is a table view with an edit button (done in interface-builder). If this is not possible, then how do I add a navbar progammatically?
From the outline view, make sure your Table View Controller is selected.
Then go to the Editor menu, and click on the Embed In submenu, and choose Navigation Controller and voila. You have your navigation controller pointing to your tableview controller with a relationship built in.
For a table view with an edit button at the top, use a UINavigationController, with a UITableView as the rootView. That means you're going to make a custom UITableView subclass for your table view, and use that as the rootView of your UINavigationController instance. (Programatically, it's set with UINavigationController's -(id)initWithRootViewController. It's also settable through IB.)
Then, in your UITableView subclass, uncomment the following line:
- (void)viewDidLoad {
[super viewDidLoad];
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
self.navigationItem.rightBarButtonItem = self.editButtonItem;
}
and voilà, your UINavigationController's view shows up as a table view with an edit button on the right side of the navigation bar.
Since the controller is at the top of the stack, there's no "back" button on the left, so you can use self.navigationItem.leftBarButtonItem for whatever UIBarButtonItem you create.
I agree that it's difficult to figure out how to do things like this in Interface Builder, but luckily it is possible to add a Navigation Bar and Bar Button Item to a Table View this way. Here's how to do it:
Drag a blank View (an instance of UIView) from the Library to the area near the top of the Table View. As you drag near the target area, Interface Builder will highlight it in blue to show you where to drop the View. Let go, and the View will be added as a subview of the Table View's header view.
Drag a Navigation Bar from the Library and drop it on the blank View you just added.
Drag a Bar Button Item from the Library and drop it onto the Navigation Bar.
EDIT
The problem with the above approach is that, as Bogatyr points out, the Navigation Bar will then scroll along with the Table View. Apple recommends using a custom subclass of UIViewController that owns both the Navigation Bar and an instance of UITableView resized to fit. Unfortunately, that means you would have to implement the UITableViewController behavior needed by your UIViewController subclass yourself.
Another approach that seems to work well is to create a custom subclass of UIViewController that owns a blank background view containing the Navigation Bar as well as a blank content view (an instance of UIView) that fits under the Navigation Bar. Your custom subclass would have an outlet pointing to an instance of UITableViewController in the same nib file.
This has the advantage of allowing all the view components to be created and configured in Interface Builder, and doesn't require implementing UITableViewController methods from scratch. The only detail you'd need to take care of in the Table View Controller's parent would be to add Table View as a subview of the parent's content view in viewDidLoad.
The parent could implement the action methods for the Navigation Bar's button items, and implement the delegate pattern if necessary.
From iOS6 onwards, you can use container view. So what you have to do is take View controller, add the navigation bar to it, then add a Container View to same view controller. It will automatically, add the new view controller link to your container view. Now simply delete that, and your table view controller in the story board. Now embed the table view controller to container view by control drag. Hope it helps.
First add a navigation controller and put the table view controller (as root view controller) onto the navigation controller. This is how it is done in Code because I don't use IB.
Why in the world you can't drag a navigationItem into a .xib file with File's Owner set to a subclass of UIViewController and hook the navigationItem up to the UIViewController's navigationItem outlet is beyond me. It seems like a real hole in IB / XCode integration. Because you can certainly drag an instance of ViewController to a xib file, and drag a navigationItem into the ViewController, and then set the title and barbuttonitems that way.
So if you want to define your UITableViewController subclass object's navigation bar in IB, you have to create your TableVC object in a xib file (not the one .xib file that contains the tableview for your UITableViewController, though!). You then either hook the TableVC object up to be an outlet of another object (like your application delegate), which works if you need just one instance of your TVC throughout the lifetime of your app, or if you want to dynamically create instances of your TableVC in code you load this extra .xib file manually via loadNibNamed:owner:options method of the NSBundle class.
These steps worked for me in iOS 9:
Add a View Controller to the Storyboard. Make UITableViewController as base Class.
Add a Navigation Bar object onto view controller at the top.
Add a Table View below Navigation bar.
Add a Table View Cell into Table View.
Add constraints.
This is the other easy way ;
Choose your TableViewController screen on storyboard.
Click Size Inspector symbol on the right menu and find Simulated Size
Change Fixed to Free Form
You can add navigation bar easily.
I am using UINavigationController to push and pop other UIViewControllers in my app.
In one of the UIViewControllers I am using UITabBar to switch between different views. One of the view has UITableView and I am having difficulty showing the tabBar at the bottom. Even if it shows up it scrolls up and down with the tableCells.
I didn't use the tabbarcontroller because apple documentation recommends not to push tabbarcontroller on to navigationcontroller stack.
Thank you.
I guess that you are using UITableViewController. The View of the UITableViewController is the tableView itself, so when you add the tab bar to the view you actually add it to the table view. that is why it scrolls with it.
you should create a regular UIView, and then add the tableView and the tab bar to that view.
shani
I want to duplicate this controller same functionality without using it, this is because tab bar controllers are not customizable at all (fixed size, toggleable state tabs, etc...).
I want a customized "tab bar" that contains whichever view I want. And also I need to push view controllers leaving this customized tab bar fixed in its position.
I´ve seen lots off apps that do this, and I was wondering if using different UIWindow objects (one for the custom tab bar and other one for the content) was the best approach.
Any advice or guidance on this?
Thanks in advance.
Definitely not UIWindows - in an iPhone app there should only ever be one UIWindow.
I'd make a UIViewController subclass that had your new navigation bar ui at the top and a UIView underneath it. This view would be used to contain all the views of the controllers you are going to push in it. The view would have clipsToBounds set to YES to make sure your other controllers views don't overlap your navigation bar etc.
It would also have an array to hold the list of controllers that are currently inside it.
Your controller would implement the pushViewController:animated: methods etc to allow you to add other view controllers to the stack - you would add the new controller to your array and would add it's view as a subview of your controller's view.
However, it's actually quite a lot of work to make this well - a navigation controller will release child controller views on low memory warnings, handle rotation, animating on/off views etc. Are you 100% sure that this is what you want to do?
I've used a very simple approach. I subclass UITabbarController and during the init:
// Custom TabBar View
//
self.tabBar.hidden = YES;
MyTabBarView *myTabBarView = [[MyTabBarView alloc] initWithFrame:CGRectMake(0, 1024-44, 768, 44) // it'a an iPad app
configuration:configuration]; // an array of dictionary representing the view controllers
[self.view addSubview:myTabBarView];
[bottomBarView release];
then I load some view controllers with:
aViewController.hidesBottomBarWhenPushed = YES;
From MyTabBarView instance I perform on the UITabBarViewController:
setSelectedIndex:
In this way I've a customizable full screen application without pains.
I am using a UINavigationController to handle the pushing and poping of viewControllers in my app. Theres a section where i have a tab bar (not using UITabbarController) which is manageed by the same UINavigationController, i simply add the UITabBar to the navigation controllers view (by using addSubview).
The Problem:
I have some UIViewControllers with table views being pushed into the navigation stack, since my Tab Bar is part of the view and not the navigation stack the TableViews are cut off at the buttom because the Navigation Controller does not know of the tab bar because its in its view and n ot the navigation stack. Without a navigation controller i would just resize the ViewControllers view and it would work fine, but when i try to do that it seems like the NavigationCOntroller just ignores my frame and sets its own and therefore the table views are cut off. I found one solution which was to add some extra cells and hide them and that works sort of OK but its kind of hackerish, anyone have any suggestion of how to go about this in a different non -hackerish way?
Thanks
Alright, so i solved the problem. I had tried resizing the UITableView instead of the viewController before, but this did not work. I just realized though, that this did not work because i was using a UITableViewController which manages its own tableView and was not letting me change the frame of it (maybe i was changing it in the wrong place, tried in viewDidLoad, i bet if i did it after the call to [super viewDidload] it would have worked..o well). So I changed the class to a UIViewController and managed the table view in there, now it works good, thanks for the replies.
Try making the root view a UIView with a UITableView for a subview. Then add the UITabBar to the UIView instance. Now the UITableView won't know about the UINavigationController.