iOS UIScrollView滚动视图/无限循环滚动/自动滚动的实例代码

<UIScrollViewDelegate>
#define WIDTH [[UIScreen mainScreen] bounds].size.width
#define HEIGHT [[UIScreen mainScreen] bounds].size.height
@property (nonatomic, strong)NSTimer *timer; //定时器
@property (nonatomic, retain)NSMutableArray *arr; //放图片的数组
@property (nonatomic, retain)UIView *headerView; //tableView的表头
@property (nonatomic, retain)UIImageView *image; //图片
@property (nonatomic, retain)UIScrollView *scrollView; 
@property (nonatomic, retain)UIPageControl *pageC; //页码
//设置头视图
- (void)headImage{
  //图片数组
  self.arr = [NSMutableArray arrayWithObjects:@"8.jpg",@"1.jpg", @"2.jpg", @"3.jpg", @"4.jpg", @"5.jpg", @"6.jpg", @"7.jpg", @"8.jpg", @"1.jpg", nil];
  self.scrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, WIDTH, 200 * HEIGHT/667)];
  self.scrollView.backgroundColor = [UIColor clearColor];
  //设置滚动量
  self.scrollView.contentSize = CGSizeMake(WIDTH * self.arr.count, 0);
  //设置偏移量
  self.scrollView.contentOffset = CGPointMake(WIDTH, 0);
  //设置按页滚动
  self.scrollView.pagingEnabled = YES;
  //设置是否显示水平滑动条
  self.scrollView.showsHorizontalScrollIndicator = NO;
  //设置是否边界反弹
  self.scrollView.bounces = NO;
  //把scrollView添加到tableView的表头的视图上
  [self.headerView addSubview:self.scrollView];
  [_scrollView release];
  //循环图片添加到UIImageView上
  for (int i = 0 ; i < self.arr.count; i  ) {
    NSString *name = [self.arr objectAtIndex:i];
    UIImage *img = [UIImage imageNamed:name];
    self.image = [[UIImageView alloc]init];
    self.image.frame = CGRectMake(i * WIDTH, 0, WIDTH, 200 * HEIGHT/667);
    self.image.image = img;
    [self.scrollView addSubview:self.image];
    [_image release];
  }
  self.scrollView.delegate = self;
  //设置页面
  self.pageC = [[UIPageControl alloc]initWithFrame:CGRectMake(100 * WIDTH/375, 120 * HEIGHT/667, 200* WIDTH/375, 60*HEIGHT/667)];
  self.pageC.backgroundColor = [UIColor clearColor];
  //把页码添加到头视图上
  [self.headerView addSubview:self.pageC];
  //设置页码数
  self.pageC.numberOfPages = self.arr.count;
  //设置选中页码的颜色
  self.pageC.currentPageIndicatorTintColor = [UIColor brownColor];
  //设置未选中的页码颜色
  self.pageC.pageIndicatorTintColor = [UIColor grayColor];
  //设置当前选中页
  self.pageC.currentPage = 0;
  //核心方法
  [self.pageC addTarget:self action:@selector(pageAction:) forControlEvents:UIControlEventValueChanged];
  [_pageC release];
  //自定义一个定时器方法
  [self addTimer];
}
 //定时器执行方法
- (void)change:(NSTimer *)time{
  if (self.pageC.currentPage == self.pageC.numberOfPages - 1) {
    self.pageC.currentPage = 0;
  } else if (self.pageC.currentPage < self.pageC.numberOfPages - 1) {
    self.pageC.currentPage  ;
  }
  [self.scrollView setContentOffset:CGPointMake((self.pageC.currentPage   1) * WIDTH, 0) animated:NO];
 }