使用网上源码KYAnimatedPageControl
self.pageControl = [[KYAnimatedPageControl alloc]initWithFrame:CGRectMake(CGRectGetWidth(self.view.bounds)/2-50, CGRectGetHeight(self.view.bounds) - 100, 100, 50)];
self.pageControl.pageCount = 4;//数量
self.pageControl.unSelectedColor = [UIColor colorWithWhite:0.9 alpha:1];//未滑动的颜色
self.pageControl.selectedColor = [UIColor redColor];//滑动的颜色
self.pageControl.bindScrollView = _scrollView; //需要绑定
self.pageControl.shouldShowProgressLine = YES;//填充，小球之前的线条变色
self.pageControl.indicatorStyle = IndicatorStyleGooeyCircle;//样式
self.pageControl.indicatorSize = 15; //圆圈大小
self.pageControl.swipeEnable = YES;//这有啥用
[self.pageControl display];//设置完所有参数调用
[self.view addSubview:self.pageControl];
self.pageControl.didSelectIndexBlock = ^(NSInteger index){
NSLog(@"Did Selected index : %ld",(long)index);
};
UIScrollViewDelegate：
#pragma mark - <UIScrollViewDelegate>
-(void)scrollViewDidScroll:(UIScrollView *)scrollView{
//Indicator动画
[self.pageControl.indicator animateIndicatorWithScrollView:scrollView andIndicator:self.pageControl];
if (scrollView.dragging || scrollView.isDecelerating || scrollView.tracking) {
//背景线条动画
[self.pageControl.pageControlLine animateSelectedLineWithScrollView:scrollView];
}
}
-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
self.pageControl.indicator.lastContentOffset = scrollView.contentOffset.x;
}
-(void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView{
[self.pageControl.indicator restoreAnimation:@(1.0/self.pageControl.pageCount)];
}
- (void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView{
self.pageControl.indicator.lastContentOffset = scrollView.contentOffset.x;
}
demo下载地址：http://pan.baidu.com/s/1pJn66pX
效果图：