UIScrollView :UIView <NSCoding>

1.创建一个UIScrollView对象

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

2.backgroundColor

背景颜色

3.contentSize

设置滚动范围

eg:scrollView.contentSize =CGSizeMake(1000, 1000);

4.contentOffset

偏移量 (初始显示)(scrollView 相对于滚动范围的坐标)

eg:scrollView.contentOffset =CGPointMake(500 , 50);

5.contentInset

可滚动的范围距离上左下右的距离

eg:scrollView.contentInset =UIEdgeInsetsMake(100, 50, 0, 0);

6.bounces

到达边缘之后没有弹动效果

eg:scrollView.bounces =NO;

7.scrollsToTop

允许用户点击状态栏返回顶部

eg:scrollView.scrollsToTop =YES;

8.scrollEnabled

是否允许用户滚动

eg:scrollView.scrollEnabled =NO;

9.pagingEnabled

按页滚动

eg:scrollView.pagingEnabled =YES;

10.showsHorizontalScrollIndicator

隐藏横向滚动条    滚动条实际上是加在scrollView上的两个imageView

eg:scrollView.showsHorizontalScrollIndicator =NO;

11.showsVerticalScrollIndicator

隐藏纵向滚动条

eg:scrollView.showsVerticalScrollIndicator =NO;

UIScrollViewDelegate

12.maximumZoomScale

设置scrollView缩放的范围

eg:scrollView.maximumZoomScale =2.0;

13.minimumZoomScale

设置scrollView缩放的范围

eg:scrollView.minimumZoomScale =0.5;

14.- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView; 

eg:

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

{

    //返回一个view 跟着scrillView缩放

    //会把scrollView的contentSize设置为imageView的大小

    //同时只能有一个view跟着scrollView缩放

    return [scrollView.subviewsfirstObject];

}

15.- (void)scrollViewDidScroll:(UIScrollView *)scrollView; 

eg:

- (void)scrollViewDidScroll:(UIScrollView *)scrollView

{

//    NSLog(@"%@",NSStringFromCGPoint(scrollView.contentOffset));

//    NSLog(@"偏移量改变了");

    //在偏移量改变的时候,计算当前的页数

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

   //通过偏移量改变pageControl的值

    self.pageControl.currentPage = pageNumber;

}

16.- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView

{

    NSLog(@"将要开始拖拽");

}

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

{

    NSLog(@"已经结束拖拽");

}

18.- (void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView

{

    NSLog(@"将要开始减速");

}

19.- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView

{

    NSLog(@"已经减速停止");

}

UI 常用方法总结之--- UIScrollView (不断更新中)