UIScrollView笔记

UIScrollView相关参数笔记

@interface ViewController ()<UIScrollViewDelegate>
@property(nonatomic,strong)UIScrollView *scrollView;
@end
@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    CGSize size = self.view.bounds.size;
    _scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, size.width, size.height)];
    _scrollView.backgroundColor = [UIColor redColor];
    _scrollView.delegate = self;
    // 是否支持滑动最顶端
    _scrollView.scrollsToTop = NO;
    // 设置内容大小
    _scrollView.contentSize = CGSizeMake(size.width*3, size.height-64);
    // 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);//全部是0的时候固定位置防止偏移
    _scrollView.scrollIndicatorInsets = UIEdgeInsetsMake(0, 0, 0, 0);
    // 提示用户,Indicators flash
    [_scrollView flashScrollIndicators];
    //隐藏竖滑条
    _scrollView.showsVerticalScrollIndicator = FALSE;
    //隐藏横滑条
    _scrollView.showsHorizontalScrollIndicator = FALSE;
    // 是否同时运动,lock
    _scrollView.directionalLockEnabled = YES;
    [self.view addSubview:_scrollView];
    
    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 100, size.width, 40)];
    label.backgroundColor = [UIColor yellowColor];
    label.text = @"第1页";
    [_scrollView addSubview:label];
    
    UILabel *label1 = [[UILabel alloc] initWithFrame:CGRectMake( size.width, 100, size.width, 40)];
    label1.backgroundColor = [UIColor blueColor];
    label1.text = @"第2页";
    [_scrollView addSubview:label1];
    
    UILabel *label2 = [[UILabel alloc] initWithFrame:CGRectMake( size.width*2, 100, size.width, 40)];
    label2.backgroundColor = [UIColor whiteColor];
    label2.text = @"第3页";
    [_scrollView addSubview:label2];
}

滑动相关代理方法

// 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(@"滑动到顶部时调用该方法");
}

// scrollView 已经滑动
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    NSLog(@"已经滑动");
}

// scrollView 开始拖动
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{
    NSLog(@"开始拖动");
}

// scrollView 结束拖动
- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate
{
    NSLog(@"结束拖动");
}

// 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(@"开始减速");
}

// scrollview 减速停止
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
    NSLog(@"减速停止");
}

放大缩小视图相关代理方法

  //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
 {
 
 }