UIScrollVIew 滚动视图内容总结

- (void)viewDidLoad

{

    [super viewDidLoad];

    // Do any additional setup after loading the view.

    

    // 滚动视图

    UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(20, 20, 280, 440)];

    scrollView.backgroundColor = [UIColor redColor];

    

    // 设定滚动内容的范围（CGSize）

    scrollView.contentSize = CGSizeMake(2800, 0);  // 横纵 坐标

    // 关掉边缘的弹动搞效果

//    srollView.bounces = NO;

    // 偏移量(CGPoint)

//    srollView.contentOffset = CGPointMake(-100, -100);

    // 内容距离上 左 下 右边缘的距离

    scrollView.contentInset = UIEdgeInsetsMake(0, 0, 0, 0);

    // 滑动到顶部

    scrollView.scrollsToTop = YES;

    // 整屏翻动

    scrollView.pagingEnabled = YES;

    // srollView能不能滚动

    scrollView .scrollEnabled = YES; // NO：不能滚动

    // 是否显示横向的滚动条

    scrollView.showsHorizontalScrollIndicator = YES;

    

    

    

    // 2.将viewController设置为ScrollView的 代理人

    scrollView.delegate = self;

    

    

    // scrollView的缩放

    // 缩放：1. 设置scrollView的缩放范围

    scrollView.minimumZoomScale = 0.5; // 最小范围

    scrollView.maximumZoomScale = 2;   // 最大范围

    

    // 设置缩放时是否弹动

    scrollView.bouncesZoom = YES;

    

    [self.view addSubview:scrollView];

    [scrollView release];

    

    

    UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(20, 20, 240, 400)];

    imageView.image = [UIImage imageNamed:@"1.JPG"];

    [scrollView addSubview:imageView];

    [imageView release];

    

    UIImageView *imageView0 = [[UIImageView alloc] initWithFrame:CGRectMake(300, 20, 240, 400)];

    imageView0.image = [UIImage imageNamed:@"2.JPG"];

    [scrollView addSubview:imageView0];

    [imageView0 release];

    

    UIImageView *imageView1 = [[UIImageView alloc] initWithFrame:CGRectMake(580, 20, 240, 400)];

    imageView1.image = [UIImage imageNamed:@"3.JPG"];

    [scrollView addSubview:imageView1];

    [imageView1 release];

    

    UIImageView *imageView2 = [[UIImageView alloc] initWithFrame:CGRectMake(580, 20, 240, 400)];

    imageView2.image = [UIImage imageNamed:@"4.JPG"];

    [scrollView addSubview:imageView2];

    [imageView2 release];

    

    UIImageView *imageView3 = [[UIImageView alloc] initWithFrame:CGRectMake(860, 20, 240, 400)];

    imageView3.image = [UIImage imageNamed:@"5.JPG"];

    [scrollView addSubview:imageView3];

    [imageView3 release];

    

    UIImageView *imageView4 = [[UIImageView alloc] initWithFrame:CGRectMake(1140, 20, 240, 400)];

    imageView4.image = [UIImage imageNamed:@"6.JPG"];

    [scrollView addSubview:imageView4];

    [imageView4 release];

    

//    UIImageView *imageView5 = [[UIImageView alloc] initWithFrame:CGRectMake(1420, 20, 240, 400)];

//    

//    [scrollView addSubview:imageView5];

//    [imageView5 release];

 

    


    

    UIPageControl *pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(20, 420, 280, 62)];

//    pageControl.backgroundColor =[UIColor clearColor];

    

    // 显示多少个点点

    pageControl.numberOfPages = 5;

    pageControl.currentPageIndicatorTintColor = [UIColor blackColor];

    

    // 给pageControl加一个响应方法

    [pageControl addTarget:self action:@selector(pageControlAction:)forControlEvents:UIControlEventValueChanged];

    

    [self.view addSubview:pageControl];

    [pageControl release];

    

    

    // 方便在其他方法中调用pageControl

    self.page = pageControl;

}


- (void)pageControlAction:(UIPageControl *)pageControl

{

    NSLog(@"%d", pageControl.currentPage);

}

//  缩放：2. 设置一个视图 随着scrollView放大缩小

- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView

{

    return [scrollView.subviews firstObject]; // 把第一个子视图随着scrollView缩放

}

// 3. 实现相对应的代理方法（协议方法）

- (void)scrollViewDidSroll:(UIScrollView *)scrollView

{

//    // 只要srollView滚动 就会一直触发这个方法

//    NSLog(@"%s", __FUNCTION__);

//    // srollView 的偏移量变化

//    NSLog(@"偏移量变化: %@", NSStringFromCGPoint(scrollView.contentOffset));

//    

//    // 判断scrollView当前的页数

//    // 偏移量.x / srollView宽度

//    int pageNumber = scrollView.contentOffset.x / scrollView.frame.size.width;

//    NSLog(@"页数: %d", pageNumber);

    

    // 当前scrollView滚动到当前页数

    self.page.currentPage = scrollView.contentOffset.x / scrollView.frame.size.width;

    

}

// 开始拖拽的时候

- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView

{

    NSLog(@"开始拖拽:%s", __FUNCTION__);

}

// 结束拖拽的时候

- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate

{

    NSLog(@"结束拖拽:%s", __FUNCTION__);

}

// 开始减速的时候

- (void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView

{

    NSLog(@"开始减速:%s", __FUNCTION__);

}

// 结束减速的时候

- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView

{

    NSLog(@"结束减速:%s", __FUNCTION__);

}