scrollView

1,设置scrollView注意一个conteneSize

2,//设置整页滑动

self.myScrollView.pagingEnabled = YES;

//关闭scrollView的弹跳 

self.myScrollView.bounces = No;

//关闭水平的滑动条

self.myScrollView.showsHorizontalScrollindicator  =NO;

3,布置pageControl

-(void)configPageControl {

//初始化pageController

self.pc = [UIPageControl alloc]init];

//有几个点

self.pc.numberOfPages = 4;

//当前选中的是第几个点  默认不设置是0

self.pc.currentPage = 0;

//每个点的颜色是什么

self.pc.pageIndicatorTintColor = [UIColor whiteColor];

//当前选中的 点的颜色是什么

self.pc.currentPageIndicatorTintColor = [UIColor greenColor];

//关闭用户交互

self.pc.userInteractionEnabled = NO;

//scrollView的代理方法   已经滑动时调用

-(void)scrollViewDidScroll:(UIScrollView *)scrollView {

// round 返回的是参数中浮点数  四舍五入 后的值

//当前在第几页上

int currentPageNum = round(scrollView.contentOffset.x / scrollView.frame.size.width);

self.pc.currentPage = currentPageNum;

}