ios 创建标题栏UINavigationBar

//创建一个导航栏

UINavigationBar *navigationBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)]; 

//创建一个导航栏集合UINavigationItem *navigationItem = [[UINavigationItem alloc] initWithTitle:nil];    

//创建一个左边按钮 

UIBarButtonItem *leftButton = [[UIBarButtonItem alloc] initWithTitle:@"左边"   style:UIBarButtonItemStyleBordered      target:self    action:@selector(clickLeftButton)];  

//创建一个右边按钮 

UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] initWithTitle:@"右边"     style:UIBarButtonItemStyleDone   target:self                                                                     action:@selector(clickRightButton)];   

//设置导航栏内容

[navigationItem setTitle:@"创建标题栏"]; 

//把导航栏集合添加入导航栏中，设置动画关闭

[navigationBar pushNavigationItem:navigationItem animated:NO];    

//把左右两个按钮添加入导航栏集合中 

[navigationItem setLeftBarButtonItem:leftButton];   

[navigationItem setRightBarButtonItem:rightButton];  

//把导航栏添加到视图中  

[self.view addSubview:navigationBar];   

//释放对象  

[navigationItem release]; 

[leftButton release];      

[rightButton release];