UI 常用方法总结之--- UIScrollView (不断更新中)

UIScrollView :
UIView <NSCoding>

1.创建一个UIScrollView对象
UIScrollView *scrollView = [[UIScrollView
alloc]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.subviews
firstObject];

}

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");

}