利用UIScrollView的滚动效果来实现，先上图:

实现过程是：在viewController里先增加UIScrollView和UIPageControl:

-(void) loadView {

    [super loadView];

    UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 320,480)];

    UIPageControl* pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(0, 438, 320, 42)];

    self.scrollView = scrollView;

    self.pageControl = pageControl;

    self.pageControl.opaque = 1;

    [self.pageControl addTarget:self action:@selector(changePage:) forControlEvents:UIControlEventValueChanged];

    [self.view addSubview:self.scrollView];

    [self.view addSubview:self.pageControl];

}

然后来初始化UIScrollView:

- (void)viewDidLoad

{

    [super viewDidLoad];

    self.contentList = [NSArray arrayWithObjects:@"1",@"2",@"3",@"4",@"5", nil];

    NSMutableArray* controllers = [[NSMutableArray alloc] init];

    for (unsigned i = 0 ; i < kNumberOfPages; i++) {

        [controllers addObject:[NSNull null]];

    }

    self.viewControllers = controllers;

    self.scrollView.pagingEnabled = YES;

    //contentSize是内容的宽度

    self.scrollView.contentSize = CGSizeMake(self.scrollView.frame.size.width*kNumberOfPages,

                                             self.scrollView.frame.size.height);

    self.scrollView.showsHorizontalScrollIndicator = NO;

    self.scrollView.showsVerticalScrollIndicator = NO;

    self.scrollView.scrollsToTop = NO;

    self.scrollView.delegate = self;

    self.pageControl.numberOfPages = kNumberOfPages;

    self.pageControl.currentPage = 0;

    [self loadScrollViewWithPage:0];

    [self loadScrollViewWithPage:1];

    // Do any additional setup after loading the view.

}

//UserImageViewController里仅仅有一个UIImageView

-(void) loadScrollViewWithPage:(int)page{

    if (page < 0) {

        return;

    }else if(page >= kNumberOfPages) {

        //do some thing,like jump to other screen

        CalendarViewExample* calendarView = [[CalendarViewExample alloc] init];

        [self presentViewController:calendarView animated:YES completion:^{}];

        return;

    }

    UserImageViewController* controller = [self.viewControllers objectAtIndex:page];

    if ((NSNull*)controller == [NSNull null]) {

        controller = [[UserImageViewController alloc] init];

        [self.viewControllers replaceObjectAtIndex:page withObject:controller];

    }

    if (controller.view.superview == nil) {

        CGRect frame = self.scrollView.frame;

        frame.origin.x = frame.size.width * page;

        frame.origin.y = 0;

        controller.view.frame = frame;

        [self.scrollView addSubview:controller.view];

        NSString* name =[self.contentList objectAtIndex:page];

        NSString *path = [[NSBundle mainBundle] pathForResource:name ofType:@"jpg"];

        controller.numberImage.image = [UIImage imageWithContentsOfFile:path];

    }

}

假设用手指来滚动的时候:

-(void) scrollViewDidScroll:(UIScrollView *)scrollView{

    if (pageControlUsed) {

        return;

    }

    CGFloat pageWidth = scrollView.frame.size.width;

    //page表示当前滚动哪一页的标识

    int page = floor((scrollView.contentOffset.x - pageWidth / 2) / pageWidth)+1;

    self.pageControl.currentPage = page;

    [self loadScrollViewWithPage:page-1];

    [self loadScrollViewWithPage:page];

    [self loadScrollViewWithPage:page+1];

}

-(void) scrollViewWillBeginDecelerating:(UIScrollView *)scrollView {

    pageControlUsed = NO;

}

-(void) scrollViewDidEndDecelerating:(UIScrollView *)scrollView {

    pageControlUsed = NO;

}

然后假设切换到下一页：

-(void) changePage:(id)sender{

    int page = self.pageControl.currentPage;

    NSLog(@"chanepage page=%d",page);

    [self loadScrollViewWithPage:page-1];

    [self loadScrollViewWithPage:page];

    CGRect frame = self.scrollView.frame;

    frame.origin.x = frame.size.width*page;

    frame.origin.y = 0;

    [self.scrollView scrollRectToVisible:frame animated:YES];

    pageControlUsed = YES;

}

代码能够在http://download.csdn.net/detail/baidu_nod/7547659下载