Changing title in UINavigationBar when a row from UITableView is touched - ios

Question

Ok, so I have tried this a lot of different ways...
At the moment I have placed the UINavigationBar with the IB. Then declared it with IBOutlet.
From there I can't seem to change the title no matter what i try. Even just in ViewDidLoad.
Also, I dont need to assign the delegate of the navbar do i?
Here is my code:
#import <UIKit/UIKit.h>
#interface ViewController : UIViewController < UITableViewDataSource, UITableViewDelegate>
{
NSArray *myArrayOne;
NSArray *myArrayTwo;
UITextView *myTextView;
UINavigationBar *myNavBar;
}
#property (nonatomic, retain) NSArray *myArrayOne;
#property (nonatomic, retain) NSArray *myArrayTwo;
#property (nonatomic, retain) IBOutlet UITextView *myTextView;
#property (nonatomic, retain) IBOutlet UINavigationBar *myNavBar;
#end
and:
#import "ViewController.h"
#interface ViewController ()
#end
#implementation ViewController
//Synthesising anything with a property call in the .h file.
#synthesize myArrayOne;
#synthesize myArrayTwo;
#synthesize myTextView;
#synthesize myNavBar;
- (void)viewDidLoad
{
//declaring and instantiating datapaths and also
// reading into arrays from plist.
NSString *datapath1 = [[NSBundle mainBundle] pathForResource:#"myListOne" ofType:#"plist"];
NSString *datapath2 = [[NSBundle mainBundle] pathForResource:#"myListTwo" ofType:#"plist"];
myArrayOne = [[NSArray alloc] initWithContentsOfFile:datapath1];
myArrayTwo = [[NSArray alloc] initWithContentsOfFile:datapath2];
self.navigationItem.title = #"Hi";
[super viewDidLoad];
}
#pragma mark - TableView Delegate stuff
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
//myNavBar.title = [myArrayOne objectAtIndex:indexPath.row];
[tableView deselectRowAtIndexPath:indexPath animated:YES];
}
#pragma mark - TableView Datasource stuff
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
//returns amount of items inside myArrayOne as amount of rows
return [myArrayOne count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *myCell = nil;
myCell = [tableView dequeueReusableCellWithIdentifier:#"myReuseCell"];
if (myCell == nil)
{
myCell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:#"myReuseCell"];
}
myCell.textLabel.text = [myArrayOne objectAtIndex:indexPath.row];
return myCell;
}
#end
the actual code to change the title is just one way i have tried...
Any other way? And do I need to link the navigationbar in the IB with anything?

Answer 1

If you have a navigation bar without a navigation controller, you have to give it a stack (in your case, a stack of one) navigation items.
In viewDidLoad of your view controller, add your view controller's navigation item to the stack:
self.myNavBar.items = #[self.navigationItem];
Now you can set the title like so:
self.navigationItem.title = #"Hello";
and it will appear in your navigation bar.

Answer 2

The solution above by jrturton works fine UNLESS you also have a UIBarButtonItem (e.g. a "Done" button) in the UINavigationBar. In that case, the proposed solution causes the UIBarButtonItem to disappear.
Here's how to do it in a way that lets you change the UINavigationBar title but also preserve the UIBarButtonItem:
Add IBOutlet UINavigationItem *myNavigationItem; to your code.
In IB, in the outline view (not the storyboard view), right click the containing UIViewController and drag to the UINavigationItem that was automatically created by IB inside the UINavigationBar and connect to myNavigationItem.
Back in your code, add self.myNavigationItem.title = #"Hello";

Answer 3

I think you need to have a navigationController instead why don't you check this link:
create navigation bar for tableView programmatically in objective-C
and if you already have a navigation controller in your app delegate, then you should remove the IBoutlet you've created then use:
self.navigationItem.title = #"Hi";
for this will be referring the navigationController in your app delegate.