IOS UIPageController

- (void)viewDidLoad

{

    [super viewDidLoad];

// Do any additional setup after loading the view, typically from a nib.

    //定义UIScrollView

    //self.scrollView = [[UIScrollView alloc] init];

    //self.scrollView.frame = CGRectMake(10, 0, 200, 500);

    self.scrollView.contentSize = CGSizeMake(1000,288);  //scrollview的滚动范围

    self.scrollView.showsVerticalScrollIndicator = NO;

    self.scrollView.showsHorizontalScrollIndicator = NO;

    //myScrollView.clipsToBounds = YES;

    self.scrollView.delegate = self;

    self.scrollView.scrollEnabled = YES;

    self.scrollView.pagingEnabled = YES; //使用翻页属性

    self.scrollView.bounces = NO;

    for(int i=0;i<4;i++)

    {

        UIImageView *imageV =[[UIImageView alloc]initWithImage:[UIImage imageNamed:@"wel2.png"]];

        [imageV setFrame:CGRectMake(200*i, 0, 192, 288)];

        [self.scrollView addSubview:imageV];

    }

    //定义PageControll

    self.pageControl.numberOfPages = 4;//指定页面个数

    self.pageControl.currentPage = 0;//指定pagecontroll的值，默认选中的小白点（第一个）

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

}

//scrollview的委托方法，当滚动时执行

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

    int page = self.scrollView.contentOffset.x / 192;//通过滚动的偏移量来判断目前页面所对应的小白点

    self.pageControl.currentPage = page;//pagecontroll响应值的变化

}

- (IBAction)changePage:(id)sender {

    int page = self.pageControl.currentPage;//获取当前pagecontroll的值

    self.label1.text = [[NSString alloc]initWithFormat:@"%d",page];

    [self.scrollView setContentOffset:CGPointMake(200 * page, 0)];//根据pagecontroll的值来改变scrollview的滚动位置，以此切换到指定的页面

   }