Uitableview-scroll to the top

In my table view I have to scroll to the top. But I cannot guarantee that the first object is going to be section 0, row 0. May be that my table view will start from section number 5.

So I get an exception, when I call:

[mainTableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:0] atScrollPosition:UITableViewScrollPositionTop animated:NO];

Is there another way to scroll to the top of table view?

转载于:https://stackoverflow.com/questions/724892/uitableview-scroll-to-the-top

30个回答

Swift 4 via extension, handles empty table view:

extension UITableView {
    func scrollToTop(animated: Bool) {
        self.setContentOffset(CGPoint.zero, animated: animated);
    }
}

Swift 3

tableView.setContentOffset(CGPoint.zero, animated: true)

if tableView.setContentOffset don't work.

Use:

tableView.beginUpdates()
tableView.setContentOffset(CGPoint.zero, animated: true)
tableView.endUpdates()
func scrollToTop() {
        NSIndexPath *topItem = [NSIndexPath indexPathForItem:0 inSection:0];
        [tableView scrollToRowAtIndexPath:topItem atScrollPosition:UITableViewScrollPositionTop animated:YES];
}

call this function wherever you want UITableView scroll to top

This was the only code snippet that worked for me

Swift 4:

    tableView.scrollRectToVisible(CGRect(x: 0, y: 0, width: 1, height: 1), animated: true)
    tableView.scrollToRow(at: IndexPath(row: 0, section: 0), at: .top, animated: true)
    tableView.setContentOffset(CGPoint(x: 0, y: -70), animated: true)

P.S. 70 is the height of my header and table view cell

On iOS 11, use adjustedContentInset to correctly scroll to top for both cases when the in-call status bar is visible or not.

if (@available(iOS 11.0, *)) {
    [tableView setContentOffset:CGPointMake(0, -tableView.adjustedContentInset.top) animated:YES];
} else {
    [tableView setContentOffset:CGPointMake(0, -tableView.contentInset.top) animated:YES];
}

Swift:

if #available(iOS 11.0, *) {
    tableView.setContentOffset(CGPoint(x: 0, y: -tableView.adjustedContentInset.top), animated: true)
} else {
    tableView.setContentOffset(CGPoint(x: 0, y: -tableView.contentInset.top), animated: true)
}

Here Is The Code To ScrollTableView To Top Programatically

Swift:

self.TableView.setContentOffset(CGPointMake(0, 1), animated:true)

For tables that have a contentInset, setting the content offset to CGPointZero will not work. It'll scroll to the content top vs. scrolling to the table top.

Taking content inset into account produces this instead:

[tableView setContentOffset:CGPointMake(0, -tableView.contentInset.top) animated:NO];
csdnceshi60
℡Wang Yan Thank you, I kept setting it to CGPointZero and could not understand why this was happening.
2 年多之前 回复

I had to add the multiply by -1 * to the sum of the status bar and the navigation bar, because it was going that height off the screen,

self.tableView.setContentOffset(CGPointMake(0 , -1 * 
  (self.navigationController!.navigationBar.height +  
  UIApplication.sharedApplication().statusBarFrame.height) ), animated:true)

using contentOffset is not the right way. this would be better as it is table view's natural way

tableView.scrollToRow(at: NSIndexPath.init(row: 0, section: 0) as IndexPath, at: .top, animated: true)

Possible Actions:

1

func scrollToFirstRow() {
    let indexPath = NSIndexPath(forRow: 0, inSection: 0)
    self.tableView.scrollToRowAtIndexPath(indexPath, atScrollPosition: .Top, animated: true)
}

2

func scrollToLastRow() {
    let indexPath = NSIndexPath(forRow: objects.count - 1, inSection: 0)
    self.tableView.scrollToRowAtIndexPath(indexPath, atScrollPosition: .Bottom, animated: true)
}

3

func scrollToSelectedRow() {
    let selectedRows = self.tableView.indexPathsForSelectedRows
    if let selectedRow = selectedRows?[0] as? NSIndexPath {
        self.tableView.scrollToRowAtIndexPath(selectedRow, atScrollPosition: .Middle, animated: true)
    }
}

4

func scrollToHeader() {
    self.tableView.scrollRectToVisible(CGRect(x: 0, y: 0, width: 1, height: 1), animated: true)
}

5

func scrollToTop(){
    self.tableView.setContentOffset(CGPointMake(0,  UIApplication.sharedApplication().statusBarFrame.height ), animated: true)
}

Disable Scroll To Top:

func disableScrollsToTopPropertyOnAllSubviewsOf(view: UIView) {
    for subview in view.subviews {
        if let scrollView = subview as? UIScrollView {
            (scrollView as UIScrollView).scrollsToTop = false
        }
        self.disableScrollsToTopPropertyOnAllSubviewsOf(subview as UIView)
    }
}

Modify and use it as per requirement.

Swift 4

  func scrollToFirstRow() {
    let indexPath = IndexPath(row: 0, section: 0)
    self.tableView.scrollToRow(at: indexPath, at: .top, animated: true)
  }
csdnceshi58
Didn"t forge Excellent summary. When you have section headers you'll have to use option4 scrollToHeader.
3 年多之前 回复
csdnceshi65
larry*wei Thats the solution, perfect - scrollToFirstRow
接近 4 年之前 回复
weixin_41568174
from.. Good solutions, scrollToFirstRow() works for me
4 年多之前 回复
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