is it possible to perform a segue from tab bar item? - ios

I used a UIview controller for my app home page and then added a tab bar at the bottom just like Facebook and then added 3 more tab bar item, it doesn't let me perform a segue when drag the tab bar item to a View Controller, is it possible progmatically or in storyboard?

I had the same problem, but i couldn't find a way to assign to a viewController its own viewControllers as in the TabViewController case.
I solved it using containers. One container for each tabBarItem in your tabBar, which are hidden or showed depending of the selected tabBarItem in the tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item method.
1. Create your containers in your UIviewController in storyBoard: Just like this Select your tabBar and Ctrl+Drag to delegate the class for listen the tabBarDelegate methods: look here
2. Declare the corrisponging IBOutlets, incliding your tabBAr:
#import <UIKit/UIKit.h>
#interface TabsMainViewController : UIViewController
#property (strong, nonatomic) IBOutlet UITabBar *tabBar;
#property (strong, nonatomic) IBOutlet UIView *directoryContainer;
#property (strong, nonatomic) IBOutlet UIView *groupsContainer;
#end
3. Select the container to show in the tabBarDelegate method:
-(void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item {
switch (item.tag) {
case 1:
_directoryContainer.hidden = NO;
_groupsContainer.hidden = YES;
break;
case 2:
_directoryContainer.hidden = YES;
_groupsContainer.hidden = NO;
break;
default:
break;
}
}
Hope that helps!

Simple: You need a UITabViewController, tab bar items can't be used the way you're asking for.
Ctrl+drag from your tabview controller to a view you'd like to include (Third in this case)
You then select the view controllers option to add the relationship segue.

Related

Tab bar without TabBarController - add View Controller for Tab bar item in storyboard

I have added a Tab bar (not a TabViewController) to a View Controller and then added some Tab bar items to that Tab bar.
Now I want to attach other View Controllers to those tab bar items in Storyboard.
When I do Ctrl + Drag to View Controller from tab bar item I do not get any options.
Please suggest a way to do this.
I had the same problem, but i couldn't find a way to assign to a viewController its own viewControllers as in the TabViewController case.
I solved it using containers. One contarner for each tabBarItem in your tabBar, which are hidden or showed depending of the selected tabBarItem in the tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item method.
1. Create your containers in your UIviewController in storyBoard:
Just like this Select your tabBar and Ctrl+Drag to delegate the class for listen the tabBarDelegate methods: look here
2. Declare the corrisponging IBOutlets, incliding your tabBAr:
#import <UIKit/UIKit.h>
#interface TabsMainViewController : UIViewController
#property (strong, nonatomic) IBOutlet UITabBar *tabBar;
#property (strong, nonatomic) IBOutlet UIView *directoryContainer;
#property (strong, nonatomic) IBOutlet UIView *groupsContainer;
#end
3. Select the container to show in the tabBarDelegate method:
-(void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item {
switch (item.tag) {
case 1:
_directoryContainer.hidden = NO;
_groupsContainer.hidden = YES;
break;
case 2:
_directoryContainer.hidden = YES;
_groupsContainer.hidden = NO;
break;
default:
break;
}
}
Hope that helps!

Implement custom UITabBar to multiple UIViewController's

I am trying to include a tab bar, with 4-5 tab bar items on it, to multiple view controllers of my app and will work as menu to jump between views (Map, About, Favourites etc.).
I have created on Storyboard a UITabBar item and set its Bar item's tags. Because the same tab bar will be used on several other view controllers (Main, View2, View3 etc.) I've decided to create a class that extends UITabBar. This will help me to customise the bar later. The UITabBar object in Storyboard is now an object of this class (BottomTabBar).
My question is, how I can detect when a bar item has been tapped?
In addition, because I am not familiar with TabBar, if you have any general guides or tips that will help me during development please share them with me.
BottomTabBar.h
#import <UIKit/UIKit.h>
#interface BottomTabBar : UITabBar <UITabBarDelegate>
#end
BottomTabBar.m
#import "BottomTabBar.h"
#implementation BottomTabBar
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
self.delegate = self;
}
return self;
}
- (void) tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item{
NSLog(#"Tabbed!");
}
#end
MainViewController.h
#import <UIKit/UIKit.h>
#import "BottomTabBar.h"
#interface MainViewController : UIViewController <UITableViewDataSource, UITableViewDelegate>{
AppDelegate *appDelegate;
NSArray *searchResults;
}
#property (strong, nonatomic) IBOutlet UIScrollView *slideshow;
#property (strong, nonatomic) IBOutlet UIPageControl *scroll;
#property (strong, nonatomic) IBOutlet BottomTabBar *bottomBar;
#end
This guide is really good:
http://www.rumex.it/2010/07/how-to-customise-the-tab-bar-uitabbar-in-an-iphone-application-part-1-of-2/
Notice there is also a second part there.
See this tutorials and source codes for custom tab bar.
Custom tabbar
I hope it helps you.

How to add a NavigationBarItem and UIBarButtonItem programmatically?

I presented a View using a call to presentModalViewController.
My new View didn't have a navigation bar, so I added one from the Library but now when I created a UIBarButtonItem in viewDidLoad of my controller, and set it to rightBarButtonItem of the navigationBarItem.
But when I run my app, the Navigation bar is there but there is no button.
Did I miss a step or something ?
Just adding a navigation bar manually will not make the self.navigationController property actual and it's value is nil, which, I believe, you're using for adding a UIBarButtonItem instance.
What I'd recommend is to declare a UINavigationBar IBOutlet in your controller, connect it in NIB editor with navigation bar you've added and after that in viewDidLoad use something like:
#interface ...
#property (nonatomic, retain) IBOutlet UINavigationBar *theBar;
#end
#implementation ...
#synthesize theBar;
-(void)viewDidLoad {
[super viewDidLoad];
UIBarButtonItem *yourButton = ...;
UINavigationItem *item = [[UINavigationItem alloc] initWithTitle:#"MyTitle"];
item.rightBarButtonItem = yourButton;
[theBar pushNavigationItem: item animated:NO];
[item release];
...
}
#end
I thought
navigationBarItem property of UIViewController is work only if your ViewController is present with UINavigationController
if you add a navigation bar with interface builder
or add it with code ,then you need to use
- (void)pushNavigationItem:(UINavigationItem *)item animated:(BOOL)animated
to add UINavigationItem yourself
you can create a UINavigationController
use - (id)initWithRootViewController:(UIViewController *)yourViewController
and use presentModalViewController to show UINavigationController that you create
then you can use navigationBarItem property of UIViewController to set rightBarButtonItem in viewDidLoad
Actually it is easier than this:
Drag a UINavigationBar into your app. Note that you will also get a UINavigationItem when you do this... make sure you keep it.
Add the following property to your app:
#property (weak, nonatomic) IBOutlet UINavigationItem *navigationItem;
Xcode will likely indicate an error (you are overriding a built in property of UIViewController), so you have to manually synthesize the getter and setter. Add the following line below the #implementation statement for the class:
#synthesize navigationItem;
In Interface Builder, drag a connection from the new navigationItem property to your custom navigation item.
You can now access your navigation item using self.navigationItem, just like you would normally.

Using a UITabBar in a View-based app not working

I have added a UITabBar to a View-based application, hooked up my View Controller as follows:
#interface SomeViewController : UIViewController<UITabBarDelegate> {
...
UITabBar *tabBar;
...
#property (nonatomic, retain) IBOutlet UITabBar *tabBar;
Inside my implementation file I have done this:
#synthesize tabBar;
- (void)tabBar: (UITabBar *)tabBar didSelectItem:(UITabBarItem *)item
{
}
I went into IB and hooked tabBar up to File's Owner tabBar.
My problem: clicking on a tab bar item never fires off the didSelectItem method. Am I missing or mis-doing a step?
Did you set the delegate of the tabbar to self?

Automatically highlight UITabBar Button

I'm using this method http://redartisan.com/2010/6/27/uisegmented-control-view-switching-revisited to create a custom UITabBar and loading a particular view when a certain TabBarItem is clicked.
The problem is that initially the first view is loaded, but the first tab bar item is not highlighted. Is there a way to force the highlight? I'm not using the tabbarcontroller so I can't use its methods.
If you make an instance variable: UITabBar *tabBar;
a property:
#property (nonatomic, assign) IBOutlet UITabBar *tabBar;
and connect this property to the UITabBar in Interface Builder, you can use:
for(UITabBarItem *tab in tabBar.items) {
if ([tab.title isEqualToString: #"My Tab Title"]) {
tabBar.selectedItem = tab;
}
}
This works if all tabs have a unique title, which is normally the case.

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