Muhammad Umair Muhammad Umair - 6 months ago 29
iOS Question

UITableview header not shown again if scrolled up

I have UITableview Controller, who has search bar in header. When i scrolled up the table view and it bounce. But the search bar hides. when i scroll down then the search bar shown. can any one tell me how can i show the search bar again?

I have tried the following code but it doesn't work smoothly:

- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
CGFloat sectionHeaderHeight = 40;//Change as per your table header hight
if (scrollView.contentOffset.y<=sectionHeaderHeight&&scrollView.contentOffset.y>=0) {
//scrollView.contentInset = UIEdgeInsetsMake(-scrollView.contentOffset.y, 0, 0, 0);
} else if (scrollView.contentOffset.y>=sectionHeaderHeight) {
CGPoint newOffset = CGPointMake(0, -[self.tableView contentInset].top);
[self.tableView setContentOffset:newOffset animated:YES];
}
}


Here is screen shot for view before scrolling:
enter image description here

And this is wrong view, After scrolling:

enter image description here

Answer

How about disabling animation to off and put custom animation like this:

also make your sure to have same sectionHeader height using MAcro. i have still doubt in your one of comment saying 35 or 25.

- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
            CGFloat sectionHeaderHeight = 40;//Change as per your table header hight
            if (scrollView.contentOffset.y<=sectionHeaderHeight&&scrollView.contentOffset.y>=0) {

    [UIView animateWithDuration: 1.0
                      animations: ^{
                          scrollView.contentInset = UIEdgeInsetsMake(-scrollView.contentOffset.y, 0, 0, 0);
                      }completion: ^(BOOL finished){
                      }
        ];
            } else if (scrollView.contentOffset.y>=sectionHeaderHeight) {
                CGPoint newOffset = CGPointMake(0, -[self.tableView  contentInset].top);


[UIView animateWithDuration: 1.0
                  animations: ^{
                      [self.tableView setContentOffset:newOffset animated:NO];
                  }completion: ^(BOOL finished){
                  }
    ];
            }
}
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