TableView去头、尾视图粘性

• 昨天下午被朋友问了问题，她需要去除TableView的尾视图粘性，结果不会了，网上有去除头视图粘性的方法，去除个尾视图粘性可以根据那个写出来，好吧，写出代码来记录下我们的这菜鸟一刻

- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
    
    // 去除头视图粘性的方法
    CGFloat sectionHeaderHeight = 40;
    
    if (scrollView.contentOffset.y<=sectionHeaderHeight&&scrollView.contentOffset.y>=0) {
        scrollView.contentInset = UIEdgeInsetsMake(-scrollView.contentOffset.y, 0, 0, 0);
    }
    else if (scrollView.contentOffset.y>=sectionHeaderHeight) {
        scrollView.contentInset = UIEdgeInsetsMake(-sectionHeaderHeight, 0, 0, 0);
    }
}

- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
    
    // 去除尾视图粘性的方法
    CGFloat sectionFooterHeight = 40;
    
    CGFloat size_height = scrollView.contentSize.height;
    
    CGFloat contentOffset_y = scrollView.contentOffset.y;
    
    CGFloat result = size_height - contentOffset_y - [UIScreen mainScreen].bounds.size.height;
    
    if (result > sectionFooterHeight) {
        scrollView.contentInset = UIEdgeInsetsMake(64, 0, -sectionFooterHeight, 0);
    }else{
        if (result>0) {
            scrollView.contentInset = UIEdgeInsetsMake(64, 0, -result, 0);
        }else{
            scrollView.contentInset = UIEdgeInsetsMake(64, 0, 0, 0);
        }
    }
}

• 两个方法不能同时写一块，以为两个方法都是通过操作偏移量来实现的，写在一起的话，前一个方法会被后一个方法覆盖