PageControl

1、实例化

_pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(30, HEIGHT-30, WIDTH-30, 30)];

2、设置圆点个数

_pageControl.numberOfPages = 9;

3、设置默认选中

_pageControl.currentPage = 0;

4、设置选中前的圆点颜色

_pageControl.pageIndicatorTintColor = [UIColor cyanColor];

5、设置选中后的圆点颜色

_pageControl.currentPageIndicatorTintColor = [UIColor redColor];

6、添加操作

[_pageControl addTarget:self action:@selector(pageControlClick:) forControlEvents:UIControlEventValueChanged];