UI06_UIPageControl

#define WIDTH self.view.frame.size.width#define HEIGHT self.view.frame.size.height@interface RootViewController ()<UIScrollViewDelegate>@property(nonatomic,retain)UIScrollView *scorllView;@property(nonatomic,retain)UIPageControl *page;@end@implementation RootViewController- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view.    self.view.backgroundColor  = [UIColor orangeColor];    //七张图的相册    //尺寸是屏幕高的一半，宽是屏幕宽    self.scorllView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, WIDTH, HEIGHT/2+100)];    self.scorllView.backgroundColor = [UIColor yellowColor];    [self.view addSubview:self.scorllView];    [_scorllView release];    self.scorllView.contentSize = CGSizeMake(7*WIDTH, 0);    self.scorllView.pagingEnabled = YES;    self.scorllView.delegate = self;    for (NSInteger i = 1; i< 8; i++) {        NSString *imageName = [NSString stringWithFormat:@"h%ld.jpeg",i];        UIImage *image = [UIImage imageNamed:imageName];        UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake((i-1)*WIDTH, 0, WIDTH, HEIGHT/2)];        imageView.image = image;        [self.scorllView addSubview:imageView];        [imageView release];}    self.page = [[UIPageControl alloc] initWithFrame:CGRectMake(100, HEIGHT/2+100, 150, 50)];    self.page.backgroundColor = [UIColor blueColor];    [self.view addSubview:self.page];    [_page release];    self.page.numberOfPages = 7;    self.page.pageIndicatorTintColor = [UIColor redColor];    self.page.currentPageIndicatorTintColor = [UIColor greenColor];    [self.page addTarget:self action:@selector(click:) forControlEvents:UIControlEventValueChanged];    //设置最大的缩放比例    self.scorllView.maximumZoomScale = 2;    //最小的缩放比例    self.scorllView.minimumZoomScale = 0.5;}//控制缩放的方法-(UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView{    UIView *view = scrollView.subviews[(NSInteger)scrollView.contentOffset.x/(NSInteger)WIDTH];    //只要进行缩放，系统就会修改scrollView的contentSize的值，所以当缩小之后，没有办法在进行拖拽    NSLog(@"%g",scrollView.contentSize.width);    return view;}-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{    self.page.currentPage = scrollView.contentOffset.x/WIDTH;}-(void)click:(UIPageControl *)page{    NSLog(@"%ld",self.page.currentPage);    self.scorllView.contentOffset = CGPointMake(WIDTH*page.currentPage, 0);}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}- (void)dealloc{    [_scorllView release];    [_page release];    [super dealloc];}@end