Adding BarButtonItem To NavigationBar

I Added a NavigationBar Through IB and I Tried to Add a BarButtonItem Programatically.....But it Doesn't Work.

- (void)viewDidLoad { 

    UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithTitle:@"Edit"style:UIBarB开发者_开发知识库uttonItemStyleBordered target:self action:@selector(EditTable:)];
    [self.navigationItem setLeftBarButtonItem:self.addButton];
    [super viewDidLoad];
}

Try to do this :

self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Back" style:UIBarButtonItemStylePlain target:self action:@selector(backButtonTapped:)];

In your case try this:

UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithTitle:@"Edit"style:UIBarButtonItemStyleBordered target:self action:@selector(EditTable:)];
[self.navigationItem setLeftBarButtonItem:addButton];

I guess this might work.

What you are doing is right, but so far, you've only added the addButton to a UINavigationItem as the leftBarButtonItem. To add it to a navigationBar, you need to then push the navigationItem onto it, similar to how you add a new UIViewController to a UINavigationController. Assuming you name your UINavigationBar navBar:

UINavigationItem *navigationItem = [[UINavigationItem alloc] init];

self.addButton = [[UIBarButtonItem alloc] initWithTitle:@"Edit"style:UIBarButtonItemStyleBordered target:self action:@selector(EditTable:)];
[navigationItem setLeftBarButtonItem:self.addButton];

[self.navBar pushNavigationItem:navigationItem animated:NO];
[navigationItem release];

Hope that helps!

UIBarButtonItem *addButton = [[UIBarButtonItem alloc] init]; 
self.navigationItem.leftBarButtonItem =  [[UIBarButtonItem alloc] initWithTitle:@"Edit"style:UIBarButtonItemStyleBordered target:self action:@selector(EditTable:)];
self.navigationItem.leftBarButtonItem = addButton;
self.navigationItem.leftBarButtonItem.enabled = YES;

For some views the leftBarButtonItem doesnt work and you need to use the backBarButtonItem. Try this:

- (void)viewDidLoad { 
    [self.navigationItem setBackBarButtonItem:[[[UIBarButtonItem alloc] initWithTitle:@"Edit" style:UIBarButtonItemStyleBordered target:self action:@selector(EditTable:)] autorelease];
    // Or, if that doesnt work for some reason use:
    // [self.navigationItem setLeftBarButtonItem:[[[UIBarButtonItem alloc] initWithTitle:@"Edit" style:UIBarButtonItemStyleBordered target:self action:@selector(EditTable:)] autorelease];
    [super viewDidLoad];
}

Also, your creating a variable within the scope of viewDidLoad called addButton, but then you are trying to set the property self.addButton as the leftBarButtonItem.

Either remove the self. from the self.addButton in:

[self.navigationItem setLeftBarButtonItem:self.addButton]; 

or initialize the property instead of creating a new item with the same name:

self.addButton = [[UIBarButtonItem alloc] initWithTitle:@"Edit"style:UIBarButtonItemStyleBordered target:self action:@selector(EditTable:)];
// instead of:
// UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithTitle:@"Edit"style:UIBarButtonItemStyleBordered target:self action:@selector(EditTable:)];