iphone - UISegmented View 改变 View

Question

我已经设置了两个barbutton 项，一个在右边，一个在左边。右边的一个成功地在两个 View 之间切换，右边的第二个是一个分段控件，它应该像明智的那样在两个 View 之间切换。这是我的代码，我想知道如何使用分段控件实现更改 View 。

- (void)setupNavigationBar {
    UINavigationBar *navBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0,  self.view.frame.size.width, 44.0f)];
    UINavigationItem *navItem = [[UINavigationItem alloc] initWithTitle:@"ContainerView"];
    navItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFastForward target:self action:@selector(switchViewControllers)];
    navBar.items = [NSArray arrayWithObject:navItem];
    segmented = [[UISegmentedControl alloc] initWithItems:
                                  [NSArray arrayWithObjects:
                                   [UIImage imageNamed:@"seg1.png"],
                                   [UIImage imageNamed:@"seg1.png"],
                                   nil]];
    segmented.frame = CGRectMake(0, 0, 50, 30);

    segmented.segmentedControlStyle = UISegmentedControlStyleBar;

    UIBarButtonItem * segmentedBarItem = [[UIBarButtonItem alloc]  initWithCustomView:segmented];
    navItem.leftBarButtonItem = segmentedBarItem;

    [self.view addSubview:navBar];
}

- (void)viewDidLoad {
    [super viewDidLoad];

    // This is just for the purpose of calling the switch method.
    [self setupNavigationBar];

    CGRect rect = CGRectMake(0, 44, 320, 436);

    currentViewController = [[FirstViewController alloc] init];
    currentViewController.view.frame = rect;

    nextViewController = [[SecondViewController alloc] init];
    nextViewController.view.frame = rect;

    [self addChildViewController:currentViewController];
    [self addChildViewController:nextViewController];

    [self.view addSubview:currentViewController.view];
}

- (void)switchViewControllers {
    [self transitionFromViewController:currentViewController toViewController:nextViewController duration:3.0 options:UIViewAnimationTransitionFlipFromRight | UIViewAnimationOptionCurveEaseInOut animations:nil completion:^(BOOL finished) {
        UIViewController *tempViewController = currentViewController;
        currentViewController = nextViewController;
        nextViewController = tempViewController;
        tempViewController = nil;
    }];
}

我将如何实现分段控件来更改 View ？

Answer 1

在UINavigationBar上添加UISegmentedControl

编辑:

NSArray *itemArray = [NSArray arrayWithObjects:
                      [UIImage imageNamed:@"1.png"],
                      [UIImage imageNamed:@"2.png"],
                      nil];

UISegmentedControl* menuSegmentedButton = [[UISegmentedControl alloc] initWithItems:itemArray];
menuSegmentedButton.momentary = YES;
menuSegmentedButton.selected = NO;
menuSegmentedButton.segmentedControlStyle = UISegmentedControlStyleBar;
   [menuSegmentedButton addTarget:self action:@selector(doMenu)
              forControlEvents:UIControlEventValueChanged];
[menuSegmentedButton sizeToFit];
UIBarButtonItem* barButton = [[UIBarButtonItem alloc]
                              initWithCustomView:menuSegmentedButton];
self.navigationItem.leftBarButtonItem = barButton;

为点击的分段按钮添加此方法

-(void)doMenu
{
    /// code for segment button tapped
}