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]; }