IOS页数控制

1.创建两个全局变量,并遵循UIScrollerview的代理

@property(nonatomic,strong)UIScrollView* scrollerview;

@property(nonatomic,strong)UIPageControl* pagenumber;

2.在需要的地方初始，设置初始值,设置UIScrollerView的pagingEnabled属性为YES，contentSize，delegate，Frame。UIPageeControl添加相应方法为：addTarget  

3.在UIScrollerView的代理方法如下代码

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

NSLog(@"222");

CGFloatpageWidth =_scrollerview.frame.size.width;

//在滚动超过页面宽度的50%的时候，切换到新的页面

int   page =floor((_scrollerview.contentOffset.x+ pageWidth/2)/pageWidth) ;

self.pagenumber.currentPage= page;

}

4、UIPageeControl的相应方法

- (void)pageaction:(UIPageControl*)sender{

CGRectframe;

frame.origin.x=_scrollerview.frame.size.width*_pagenumber.currentPage;

frame.origin.y=0;

frame.size=_scrollerview.frame.size;

[_scrollerviewscrollRectToVisible:frameanimated:YES];

}