iOS 如何获取scrollView状态是否正在滚动

一个最优解=方案，完美解决了手势滑动的开始结束和代码滑动的问题

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

    [NSObjectcancelPreviousPerformRequestsWithTarget:self];

    //NSLog(@"滑动停止（animation）");

    _isScrolling =NO ;

    NSLog(@"滑动停止 = page%@",@(self.currentPage) );

}

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

    [NSObjectcancelPreviousPerformRequestsWithTarget:self];

    [selfperformSelector:@selector(scrollViewDidEndScrollingAnimation:)withObject:nilafterDelay:0.3];

    //NSLog(@"滑动中");

    _isScrolling =YES ;

}