滚动视图：在根视图中添加UIScrollViewDelegate协议，声明一些对象属性
@interface BoViewController : UIViewController<UIScrollViewDelegate>//滚动视图对象@property (retain, nonatomic) UIScrollView *scrollView;//视图中小圆点，对应视图的页码@property (retain, nonatomic) UIPageControl *pageControl;//动态数组对象，存储图片@property (retain, nonatomic) NSMutableArray *images;@end
在程序中导入图片，，在.m文件中的代码实现：
– (void)viewDidLoad{[super viewDidLoad];//初始化scrollViewself.scrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, 320, 345)];//初始化pageControlself.pageControl = [[UIPageControl alloc]initWithFrame:CGRectMake(0, 344, 320, 36)];//初始化数组，存储滚动视图的图片self.images = [NSMutableArray arrayWithObjects:[UIImage imageNamed:@"text1.png"],[UIImage imageNamed:@"text2.png"],[UIImage imageNamed:@"text3.png"],[UIImage imageNamed:@"text4.png"], nil];//把scrollView与pageControl添加到当前视图中[self.view addSubview:self.scrollView];[self.view addSubview:self.pageControl];//设置视图的背景颜色self.view.backgroundColor = [UIColor blackColor];//调用 setuoPage方法[self setupPage:nil];}//改变滚动视图的方法实现- (void)setupPage:(id)sender{//设置委托self.scrollView.delegate = self;//设置背景颜色self.scrollView.backgroundColor = [UIColor blackColor];//设置取消触摸self.scrollView.canCancelContentTouches = NO;//设置滚动条类型self.scrollView.indicatorStyle = UIScrollViewIndicatorStyleWhite;//是否自动裁切超出部分self.scrollView.clipsToBounds = YES;//设置是否可以缩放self.scrollView.scrollEnabled = YES;//设置是否可以进行画面切换self.scrollView.pagingEnabled = YES;//设置在拖拽的时候是否锁定其在水平或者垂直的方向self.scrollView.directionalLockEnabled = NO;//隐藏滚动条设置（水平、跟垂直方向）self.scrollView.alwaysBounceHorizontal = NO;self.scrollView.alwaysBounceVertical = NO;self.scrollView.showsHorizontalScrollIndicator = NO;self.scrollView.showsVerticalScrollIndicator = NO;//用来记录页数NSUInteger pages = 0;//用来记录scrollView的x坐标int originX = 0;for(UIImage *image in self.images){//创建一个视图UIImageView *pImageView = [[[UIImageView alloc]initWithFrame:CGRectZero]autorelease];//设置视图的背景色pImageView.backgroundColor = [UIColor colorWithRed:0.6 green:0.6 blue:0.6 alpha:1.0];//设置imageView的背景图[pImageView setImage:image];//给imageView设置区域CGRect rect = self.scrollView.frame;rect.origin.x = originX;rect.origin.y = 0;rect.size.width = self.scrollView.frame.size.width;rect.size.height = self.scrollView.frame.size.height;pImageView.frame = rect;//设置图片内容的显示模式(自适应模式)pImageView.contentMode = UIViewContentModeScaleAspectFill;//把视图添加到当前的滚动视图中[self.scrollView addSubview:pImageView];//下一张视图的x坐标:offset为:self.scrollView.frame.size.width.originX += self.scrollView.frame.size.width;//记录scrollView内imageView的个数pages++;}//设置页码控制器的响应方法[self.pageControl addTarget:self action:@selector(changePage:) forControlEvents:UIControlEventValueChanged];//设置总页数self.pageControl.numberOfPages = pages;//默认当前页为第一页self.pageControl.currentPage = 0;//为页码控制器设置标签self.pageControl.tag = 110;//设置滚动视图的位置[self.scrollView setContentSize:CGSizeMake(originX, self.scrollView.bounds.size.height)];}//改变页码的方法实现- (void)changePage:(id)sender{NSLog(@"指示器的当前索引值为:%i",self.pageControl.currentPage);//获取当前视图的页码CGRect rect = self.scrollView.frame;//设置视图的横坐标，一幅图为320*460，横坐标一次增加或减少320像素rect.origin.x = self.pageControl.currentPage * self.scrollView.frame.size.width;//设置视图纵坐标为0rect.origin.y = 0;//scrollView可视区域[self.scrollView scrollRectToVisible:rect animated:YES];}#pragma mark—–UIScrollViewDelegate———//实现协议UIScrollViewDelegate的方法，必须实现的- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{//获取当前视图的宽度CGFloat pageWith = scrollView.frame.size.width;//根据scrolView的左右滑动,对pageCotrol的当前指示器进行切换(设置currentPage)int page = floor((scrollView.contentOffset.x – pageWith/2)/pageWith)+1;//切换改变页码，小圆点self.pageControl.currentPage = page;}- (void)didReceiveMemoryWarning{[super didReceiveMemoryWarning];// Dispose of any resources that can be recreated.}//释放创建的对象- (void)dealloc{[_pageControl release];[_scrollView release];[super dealloc];}
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你的选择是做或不做，但不做就永远不会有机会
