这是我试图在其上显示工具栏的导航控制器的根视图控制器的 init 方法：
-(id) initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil{
self = [super initWithNibName:nil bundle:nil];
if(self){
//GUI implementation
self.navigationController.toolbarHidden = NO;
UIBarButtonItem *flexiableItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace
target:self
action:nil];
UIBarButtonItem *item1 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemRefresh
target:self
action:nil];
self.toolbarItems = [NSArray arrayWithObjects:flexiableItem, item1, nil];
UIBarButtonItem* addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd
target:self
action:@selector(addEmployee)];
self.navigationItem.rightBarButtonItem = addButton;
self.navigationItem.leftBarButtonItem = self.editButtonItem;
}
return self;
}
这是我application:DidFinishLaunching在应用程序委托中的委托方法：
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
BOHomeViewController* hvc = [[BOHomeViewController alloc] initWithStyle:UITableViewStylePlain];
UINavigationController* navbar = [[UINavigationController alloc] initWithRootViewController:hvc];
[self.window setRootViewController:navbar];
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
return YES;
}
工具栏根本不显示。有人可以指出我做错了什么吗？非常感激。