UI UIScrollView和UIPageControl的结合使用

<span style="font-size:18px;">- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.

UIScrollView *scrollView=[[UIScrollView alloc]initWithFrame:self.view.bounds];
scrollView.contentSize=CGSizeMake(320*5, 480);
//把图片名放到数组
NSArray *nameArr=[NSArray arrayWithObjects:@"1.jpg",@"2.jpg",@"3.jpg",@"4.jpg",@"5.jpg", nil];
for (int i=0; i<nameArr.count; i++) {
UIImage *img=[UIImage imageNamed:[nameArr objectAtIndex:i]];
UIImageView *imgView=[[UIImageView alloc]initWithFrame:CGRectMake(i*320, 0, 320, 480)];
imgView.image=img;
[scrollView addSubview:imgView];
[imgView release];
}
scrollView.pagingEnabled=YES;
scrollView.delegate=self;
[self.view addSubview:scrollView];
[scrollView release];
self.scrollView=scrollView;

UIPageControl *pageControl=[[UIPageControl alloc]initWithFrame:CGRectMake(50, 400, 200, 50)];
pageControl.numberOfPages=5;
pageControl.currentPageIndicatorTintColor=[UIColor redColor];
//添加事件
[pageControl addTarget:self action:@selector(pageChanged:) forControlEvents:UIControlEventValueChanged];
[self.view addSubview:pageControl];
[pageControl release];
self.pageControl=pageControl;
}

- (void)pageChanged:(UIPageControl*)pageControl
{
long currentPage=pageControl.currentPage;
CGPoint offset=CGPointMake(currentPage*320, 0);
//设置scrollView的偏移量
self.scrollView.contentOffset=offset;

}

- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
self.pageControl.currentPage=self.scrollView.contentOffset.x/320;
//    //获取偏移量
//    CGPoint offset=scrollView.contentOffset;
//    //计算页数
//    int pageCount=offset.x/320;
//    self.pageControl.currentPage=pageCount;

}

-(void)dealloc
{
[_scrollView release];
[_pageControl release];
[super dealloc];
}
</span>