一、tableView刷新數(shù)據(jù)后的偏移量問(wèn)題

在初始化tableView時(shí)對(duì)預(yù)算高度設(shè)置如下即可解決：

    self.tableView.estimatedRowHeight = 0;
    self.tableView.estimatedSectionHeaderHeight = 0;
    self.tableView.estimatedSectionFooterHeight = 0;

二、獲取tableView的當(dāng)前區(qū)的索引以及設(shè)置滑動(dòng)偏移量

獲取滑動(dòng)到當(dāng)前區(qū)的索引

    //拿到當(dāng)前滑動(dòng)到哪個(gè)區(qū)
    NSArray *arrVisible = self.tableView.indexPathsForVisibleRows;
    NSArray *indexPaths = [arrVisible sortedArrayUsingComparator:^NSComparisonResult(id  _Nonnull obj1, id  _Nonnull obj2) {
        NSIndexPath *path1 = (NSIndexPath *)obj1;
        NSIndexPath *path2 = (NSIndexPath *)obj2;
        return [path1 compare:path2];
    }];
    
    NSIndexPath *indexPath = (NSIndexPath *)[indexPaths lastObject];
    NSInteger section = indexPath.section;

設(shè)置tableView的滑動(dòng)偏移量

    //點(diǎn)擊切換tableView的偏移量----進(jìn)行展示
    NSInteger index = [self.navButtonArray indexOfObject:button];
    if (index == 0) {
        [self.tableView setContentOffset:CGPointMake(0, 0) animated:YES];
    }else{
        NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:index];
        [self.tableView scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionTop animated:YES];
    }