UIScrollView基本用法和代理方法
- ( void )viewDidLoad { [super viewDidLoad]; scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 320, 460)]; scrollView.backgroundColor = [UIColor redColor]; // 是否支持滑动最顶端 // scrollView.scrollsToTop = NO; scrollView.delegate = self; // 设置内容大小 scrollView.contentSize = CGSizeMake(320, 460*10); // 是否反弹 // scrollView.bounces = NO; // 是否分页 // scrollView.pagingEnabled = YES; // 是否滚动 // scrollView.scrollEnabled = NO; // scrollView.showsHorizontalScrollIndicator = NO; // 设置indicator风格 // scrollView.indicatorStyle = UIScrollViewIndicatorStyleWhite; // 设置内容的边缘和Indicators边缘 // scrollView.contentInset = UIEdgeInsetsMake(0, 50, 50, 0); // scrollView.scrollIndicatorInsets = UIEdgeInsetsMake(0, 50, 0, 0); // 提示用户,Indicators flash [scrollView flashScrollIndicators]; // 是否同时运动,lock scrollView.directionalLockEnabled = YES; [self.view addSubview:scrollView]; UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 200, 320, 40)]; label.backgroundColor = [UIColor yellowColor]; label.text = @ "学习scrolleview" ; [scrollView addSubview:label]; [label release]; } #pragma mark - /* // 返回一个放大或者缩小的视图 - (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView { } // 开始放大或者缩小 - (void)scrollViewWillBeginZooming:(UIScrollView *)scrollView withView: (UIView *)view { } // 缩放结束时 - (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(float)scale { } // 视图已经放大或缩小 - (void)scrollViewDidZoom:(UIScrollView *)scrollView { NSLog(@"scrollViewDidScrollToTop"); } */ // 是否支持滑动至顶部 - ( BOOL )scrollViewShouldScrollToTop:(UIScrollView *)scrollView { return YES; } // 滑动到顶部时调用该方法 - ( void )scrollViewDidScrollToTop:(UIScrollView *)scrollView { NSLog(@ "scrollViewDidScrollToTop" ); } // scrollView 已经滑动 - ( void )scrollViewDidScroll:(UIScrollView *)scrollView { NSLog(@ "scrollViewDidScroll" ); } // scrollView 开始拖动 - ( void )scrollViewWillBeginDragging:(UIScrollView *)scrollView { NSLog(@ "scrollViewWillBeginDragging" ); } // scrollView 结束拖动 - ( void )scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:( BOOL )decelerate { NSLog(@ "scrollViewDidEndDragging" ); } // scrollView 开始减速（以下两个方法注意与以上两个方法加以区别） - ( void )scrollViewWillBeginDecelerating:(UIScrollView *)scrollView { NSLog(@ "scrollViewWillBeginDecelerating" ); } // scrollview 减速停止 - ( void )scrollViewDidEndDecelerating:(UIScrollView *)scrollView { NSLog(@ "scrollViewDidEndDecelerating" ); } @interface RootViewController : UIViewController<UIScrollViewDelegate> { UIScrollView *_scrollView; NSMutableArray *slideImages; UIPageControl *_page; } @end #import "RootViewController.h" @interface RootViewController () @end @implementation RootViewController - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { // Custom initialization } return self; } - ( void )viewDidLoad { [super viewDidLoad]; _scrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 20, 320, 240)]; _scrollView.bounces = NO; _scrollView.pagingEnabled = YES; _scrollView.delegate = self; _scrollView.contentOffset = CGPointMake(320, 0); _scrollView.contentSize = CGSizeMake(1920,240); _scrollView.showsVerticalScrollIndicator =NO; _scrollView.showsHorizontalScrollIndicator = NO; _scrollView.userInteractionEnabled = YES; [self.view addSubview:_scrollView]; [_scrollView release]; slideImages = [[NSMutableArray alloc]initWithObjects:@ "1.jpeg" ,@ "2.jpg" ,@ "3.jpeg" ,@ "4.jpeg" , nil]; UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:[slideImages objectAtIndex:([slideImages count]-1)]]]; imageView.frame = CGRectMake(0, 0, 320, 240); [_scrollView addSubview:imageView]; [imageView release]; for ( int i = 0;i<[slideImages count];i++) { //loop this bit UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:[slideImages objectAtIndex:i]]]; imageView.frame = CGRectMake(320*i+320, 0, 320, 240); imageView.userInteractionEnabled = YES; [_scrollView addSubview:imageView]; [imageView release]; } imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:[slideImages objectAtIndex:0]]]; imageView.frame = CGRectMake(320*5, 0, 320, 240); [_scrollView addSubview:imageView]; [imageView release]; _page = [[UIPageControl alloc]initWithFrame:CGRectMake(240, 230, 70, 30)]; _page.numberOfPages = 4; _page.currentPage = 0; // _page.backgroundColor = [UIColor grayColor]; [_page addTarget:self action:@selector(pageAction) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:_page]; [_page release]; // Do any additional setup after loading the view. } - ( void )scrollViewDidEndDecelerating:(UIScrollView *)scrollView { int currentPage = (_scrollView.contentOffset.x - _scrollView.frame.size.width / ([slideImages count]+2)) / _scrollView.frame.size.width + 1; NSLog(@ "%d" ,currentPage); if (currentPage==0) { [_scrollView scrollRectToVisible:CGRectMake(320*4, 0, 320, 240) animated:NO]; } else if (currentPage==([slideImages count]+1)) { //如果是最后+1,也就是要开始循环的第一个 [_scrollView scrollRectToVisible:CGRectMake(320, 0, 320, 240) animated:NO]; } } - ( void )scrollViewDidScroll:(UIScrollView *)sender { int page = _scrollView.contentOffset.x/320-1; _page.currentPage = page; } -( void )pageAction { int page = _page.currentPage; [_scrollView setContentOffset:CGPointMake(320 * (page+1), 0)]; } - ( void )didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } - ( void )dealloc { [slideImages release]; [super dealloc]; } @end