UIPageControl 与 UIScrollView

#import "MainViewController.h"#define WIDTH self.view.frame.size.width#define HEIGHT self.view.frame.size.height@interface MainViewController ()<UIScrollViewDelegate>@property(nonatomic, retain)UIScrollView *scrollView;@end@implementation MainViewController- (void)dealloc{    [_scrollView release];    [super dealloc];}- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view. // 创建可以播放图片的ScrollView       self.scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, WIDTH, HEIGHT - 40)];    self.scrollView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"222.jpg"]];    [self.view addSubview:self.scrollView];    [_scrollView release];    self.scrollView.pagingEnabled = YES;    self.scrollView.contentSize = CGSizeMake(WIDTH * 10, HEIGHT - 40);    for (NSInteger i = 1; i < 11; i++) {        NSString *picName = [NSString stringWithFormat:@"%ld.jpg",i];        UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:picName]];        imageView.frame = CGRectMake(WIDTH * (i - 1), 0, WIDTH, HEIGHT - 40);        [self.scrollView addSubview:imageView];        [imageView release];    }    self.scrollView.delegate = self;    // scrollView 的缩放,坑爹的地方:缩放之后就不能再进行滚动了/    // 设置缩放的比例    //最大缩放比例    self.scrollView.maximumZoomScale = 2;    // 最小缩放比例    self.scrollView.minimumZoomScale = 0.5;    //对它缩放的原始比例    self.scrollView.zoomScale = 1;// 创建UIPageControl        UIPageControl *pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(0, HEIGHT - 40, WIDTH, 40)];    [self.view addSubview:pageControl];    pageControl.backgroundColor = [UIColor blackColor];    [pageControl release];    // 其他设置:    // 图片个数和点的个数相同.    pageControl.numberOfPages = 10;    // 其余圆点的颜色    pageControl.pageIndicatorTintColor = [UIColor redColor];    // 被选中点的颜色    pageControl.currentPageIndicatorTintColor = [UIColor cyanColor];// 继承于UIControl,所以有点击方法.    [pageControl addTarget:self action:@selector(pageAction:) forControlEvents:UIControlEventValueChanged];    pageControl.tag = 1000;}// UIPageControl 的点击方法实现#pragma mark 让点击UIPageControl左右侧的时候,图片变换- (void)pageAction:(UIPageControl *)page{    // 点从第0个开始算.    NSLog(@"%ld",page.currentPage);   // 下面这个方式书写没有动画效果 //self.scrollView.contentOffset = CGPointMake(page.currentPage * WIDTH, 0);    // 有动画效果/    [self.scrollView setContentOffset:CGPointMake(page.currentPage * WIDTH, 0) animated:YES];}#pragma mark 变换图片的时候,让点也跟着变- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{    UIPageControl *page = (UIPageControl *)[self.view viewWithTag:1000];    page.currentPage = self.scrollView.contentOffset.x/WIDTH;}#pragma mark 专门用于缩放的协议方法的实现. 坏处是无法恢复到原来图片大小.不建议使用.- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView{    return [scrollView.subviews firstObject];}

效果如下图, 只能在重新运行模拟器….