Sunday, June 9, 2013

UINavigationItem rightBarButtonItem example in Objective C (iOS).

UINavigationItem rightBarButtonItem

A custom bar button item displayed on the right of the navigation bar when the receiver is the top navigation item.

@property(nonatomic, retain) UIBarButtonItem *rightBarButtonItem

Discussion of [UINavigationItem rightBarButtonItem]
In iOS 5.0 and later, the contents of this property always refer to the first bar button item in the rightBarButtonItems array. Assigning a new value to this property replaces the first item in the rightBarButtonItems array with the new value. Setting this property to nil removes the first item in the array. If the bar button item is already in the array, it is moved from its current location to the front of the array.

Prior to iOS 5.0, this property contained the single bar item to display on the right side of the navigation bar.

Available in iOS 2.0 and later.

UINavigationItem rightBarButtonItem example.
UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] initWithTitle:@"Done"
    style:UIBarButtonItemStyleDone target:nil action:nil];
UINavigationItem *item = [[UINavigationItem alloc] initWithTitle:@"Title"];
item.rightBarButtonItem = rightButton;
item.hidesBackButton = YES;
[bar pushNavigationItem:item animated:NO];
[rightButton release];
[item release];
But normally you would have a navigation controller, enabling you to write:

UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] initWithTitle:@"Done"
    style:UIBarButtonItemStyleDone target:nil action:nil];
self.navigationItem.rightBarButtonItem = rightButton;
[rightButton release];

Example of [UINavigationItem rightBarButtonItem].
UIView *parentView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, myWidth, myHeight)];
// make UIView customView1... (UILabel, UIButton, etc.) with desired frame and settings
[parentView addSubview:customView1];
[customView1 release];
// make UIView customView2... (UILabel, UIButton, etc.) with desired frame and settings
[parentView addSubview:customView2];
[customView2 release];
UIBarButtonItem *customBarButtomItem = [[UIBarButtonItem alloc] initWithCustomView:parentView];
[parentView release];
self.navigationItem.rightBarButtonItem = customBarButtomItem;
[customBarButtomItem release];

UINavigationItem rightBarButtonItem example.
UIView *containerView = [[UIView alloc] initWithFrame:CGRectMake(89,40,100,30)];
containerView.layer.borderColor = [[UIColor redColor] CGColor];
containerView.layer.borderWidth = 1.0;
UIImage *image = [UIImage imageNamed:@"nav-icon.png"];
UIButton *navigationButton = [UIButton buttonWithType:UIButtonTypeCustom];
[navigationButton setFrame:CGRectMake(67,0,25,25)];
[navigationButton setImage:image forState:UIControlStateNormal];
[containerView addSubview:navigationButton];

UIBarButtonItem *navigationBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:containerView];

self.navigationItem.rightBarButtonItem = navigationBarButtonItem;

End of UINavigationItem rightBarButtonItem example article.