IPhone之navigationItem

注：

使用其navigationItem时，首先要确保UINavigationController 视图已经加载到ViewController中。

其代码为：

 

[[UINavigationController alloc] initWithRootViewController:viewController];

 

 

1、添加按钮

 

UIBarButtonItem *loginBut =[[UIBarButtonItem alloc] initWithTitle:@"Login" style:UIBarButtonItemStylePlain target:self action:@selector(login)];        self.navigationItem.rightBarButtonItem = loginBut;        [loginBut release];         UIBarButtonItem *createBut =[[UIBarButtonItem alloc] initWithTitle:@"NEW" style:UIBarButtonItemStylePlain target:self action:@selector(creatUser)];        self.navigationItem.leftBarButtonItem = createBut;        [createBut release];

 

 

2、添加segmentedControl

 

UISegmentedControl *m_segmentedControl = [[UISegmentedControl alloc] initWithItems:                                             [NSArray arrayWithObjects:                                             [UIImage imageNamed:@"up.png"],                                             [UIImage imageNamed:@"down.png"],                                             nil]];     [m_segmentedControl addTarget:self action:@selector(segmentAction:) forControlEvents:UIControlEventValueChanged];     m_segmentedControl.frame = CGRectMake(0, 0, 90, 30);     m_segmentedControl.segmentedControlStyle = UISegmentedControlStyleBar;     m_segmentedControl.momentary = YES;         UIBarButtonItem *segmentBarItem = [[UIBarButtonItem alloc] initWithCustomView:m_segmentedControl];     [m_segmentedControl release];         self.navigationItem.rightBarButtonItem = segmentBarItem;     [segmentBarItem release];

 

 

3、设置标题

 

self.navigationItem.title = @"详细内容";

 

 

4、设置返回按钮

 

self.navigationItem.backBarButtonItem = [[[UIBarButtonItem alloc] initWithTitle:@"主菜单" style:UIBarButtonItemStylePlain target:nil action:nil] autorelease];