iOS学习之UINavigationController详解与使用(二)页面切换和segmentedController

1、RootView 跳到SecondView

首先我们需要新一个View。新建SecondView，按住Command键然后按N,弹出新建页面，我们新建SecondView

2、为Button 添加点击事件，实现跳转

在RootViewController.xib中和RootViewController.h文件建立连接

在RootViewController.m中实现代码，alloc一个SecondViewController，用pushViewController到navigationController中去，并为

 

SecondViewController这是title为    secondView.title =@"Second View"; 默认情况下，titie为下个页面返回按钮的名字。

- (IBAction)gotoSecondView:(id)sender {
    SecondViewController *secondView = [[SecondViewController alloc] init];
    [self.navigationController pushViewController:secondView animated:YES];
    secondView.title = @"Second View";
}

- (IBAction)gotoSecondView:(id)sender {
    SecondViewController *secondView = [[SecondViewController alloc] init];
    [self.navigationController pushViewController:secondView animated:YES];
    secondView.title = @"Second View";
}

这是点击GotoSecondView 按钮，出现

这就是SecondView了。

3、添加segmentedController

在nav bar这样的效果是如何实现的呢?

这就是segmentedController。

3.1在RootViewController.m的viewDidLoad添加如下代码:

 

NSArray *array = [NSArray arrayWithObjects:@"鸡翅",@"排骨", nil];
   UISegmentedControl *segmentedController = [[UISegmentedControl alloc] initWithItems:array];
   segmentedController.segmentedControlStyle = UISegmentedControlSegmentCenter;

   [segmentedController addTarget:self action:@selector(segmentAction:) forControlEvents:UIControlEventValueChanged];
   self.navigationItem.titleView = segmentedController;

 NSArray *array = [NSArray arrayWithObjects:@"鸡翅",@"排骨", nil];
    UISegmentedControl *segmentedController = [[UISegmentedControl alloc] initWithItems:array];
    segmentedController.segmentedControlStyle = UISegmentedControlSegmentCenter;

    [segmentedController addTarget:self action:@selector(segmentAction:) forControlEvents:UIControlEventValueChanged];
    self.navigationItem.titleView = segmentedController;

3.2[segmentedController addTarget:selfaction:的实现

 

-(void)segmentAction:(id)sender
{
    switch ([sender selectedSegmentIndex]) {
        case 0:
        {
            UIAlertView *alter = [[UIAlertView alloc] initWithTitle:@"提示" message:@"你点击了鸡翅" delegate:self  cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
            [alter show];

        }
        break;
    case 1:
        {
            UIAlertView *alter = [[UIAlertView alloc] initWithTitle:@"提示" message:@"你点击了排骨" delegate:self  cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
            [alter show];
        }
        break;

        default:
            break;
    }
}

-(void)segmentAction:(id)sender
{
    switch ([sender selectedSegmentIndex]) {
        case 0:
        {
            UIAlertView *alter = [[UIAlertView alloc] initWithTitle:@"提示" message:@"你点击了鸡翅" delegate:self  cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
            [alter show];

        }
        break;
    case 1:
        {
            UIAlertView *alter = [[UIAlertView alloc] initWithTitle:@"提示" message:@"你点击了排骨" delegate:self  cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
            [alter show];
        }
        break;
        
        default:
            break;
    }
}

这样就能响应鸡翅和排骨按钮了

4、自定义backBarButtonItem

 

左上角的返回上级View的barButtonitem的名字是上级目录的Title，如果title或者适合做button的名字，怎么办呢？我们可以自己定义

代码如下：

 

UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:@"根视图" style:UIBarButtonItemStyleDone target:nil action:nil];
   self.navigationItem.backBarBu

 UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:@"根视图" style:UIBarButtonItemStyleDone target:nil action:nil];
    self.navigationItem.backBarBu

效果：

6、自定义title

UINavigationController的title可以用别view替代，比如用UIButton UILable等，下面我用UIButton.

在SecondViewController.m中添加下面如下。

 

- (void)viewDidLoad
{
    [super viewDidLoad];
    UIButton *button = [UIButton buttonWithType: UIButtonTypeRoundedRect];
    [button setTitle: @"自定义title" forState: UIControlStateNormal];
    [button sizeToFit];
    self.navigationItem.titleView = button;}

- (void)viewDidLoad
{
    [super viewDidLoad];
    UIButton *button = [UIButton buttonWithType: UIButtonTypeRoundedRect];
    [button setTitle: @"自定义title" forState: UIControlStateNormal];
    [button sizeToFit];
    self.navigationItem.titleView = button;}

运行程序，goto secondView，运行效果

下篇文件讲下Navigation 的Toobar如何显示和如何自己定义。

http://blog.csdn.net/totogo2010/article/details/7682433