iOS UIScrollView滚动视图/无限循环滚动/自动滚动的实例代码

#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(inti =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;

  }elseif(self.pageC.currentPage < self.pageC.numberOfPages -1) {

    self.pageC.currentPage++;

  }

  [self.scrollView setContentOffset:CGPointMake((self.pageC.currentPage +1) * WIDTH,0) animated:NO];

 }