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    //创建UIPageControl
    UIPageControl * page = [[UIPageControl alloc] initWithFrame:CGRectMake(0, self.view.bounds.size.height-50, self.view.bounds.size.width, 50)];
    
    //设置背景颜色
    page.backgroundColor = [UIColor clearColor];
    
    //设置小圆圈的个数
    page.numberOfPages = 15;
    
    //设置 小圆圈的颜色
    page.pageIndicatorTintColor = [UIColor orangeColor];
    
    //设置当前页的小圆圈颜色
    page.currentPageIndicatorTintColor = [UIColor redColor];
    
    //获取/更改当前页
    page.currentPage = 1;
    
    //增加点击事件
    [page addTarget:self action:@selector(pageClick:) forControlEvents:UIControlEventValueChanged];