本篇文章小编给大家分享一下scrollview tableView嵌套解决方案代码示例,文章代码介绍的很详细,小编觉得挺不错的,现在分享给大家供大家参考,有需要的小伙伴们可以来看看。
效果预览:
NestScrollView.gif
核心代码就是在父视图、子试图的滚动判断
//父视图滚动的回调,用于横向滚动判断
//父视图滚动的回调,用于横向滚动判断 - (void)scrollViewDidScroll:(UIScrollView *)scrollView{ CGFloat placeholderOffset = 0; if (self.topView.selectedIndex == 0) { if (self.firstTableView.contentOffset.y > CGRectGetHeight(self.topView.frame) - kItemheight) { placeholderOffset = CGRectGetHeight(self.topView.frame) - kItemheight; }else { placeholderOffset = self.firstTableView.contentOffset.y; } [self.secondTableView setContentOffset:CGPointMake(0, placeholderOffset) animated:NO]; }else { if (self.secondTableView.contentOffset.y > CGRectGetHeight(self.topView.frame) - kItemheight) { placeholderOffset = CGRectGetHeight(self.topView.frame) - kItemheight; }else { placeholderOffset = self.secondTableView.contentOffset.y; } [self.firstTableView setContentOffset:CGPointMake(0, placeholderOffset) animated:NO]; } }
//子视图滚动的回调,用于竖直方向上滚动判断
//子视图滚动的回调,用于竖直方向上滚动判断 - (void)updateTopViewFrame:(UIScrollView *)scrollView{ CGFloat placeHolderHeight = CGRectGetHeight(self.topView.frame) - self.topView.itemHeight; CGFloat offsetY = scrollView.contentOffset.y; CGFloat y = 0.0; if (offsetY >= 0 && (offsetY <= placeHolderHeight)) { y = -offsetY; } else if (offsetY > placeHolderHeight) { y = -placeHolderHeight; } else if (offsetY < 0) { y = -offsetY; } [self.topView mas_updateConstraints:^(MASConstraintMaker *make) { make.top.offset(y + kNavBarHeight); }]; }