UITableView를 특정 위치로 스크롤하는 방법

UITableView를 특정 위치로 스크롤하는 방법

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표의 셀을 특정 위치로 스크롤하려면 어떻게해야합니까? 높이에 따라 3 줄이 표시된 테이블이 있습니다. 내가 원하는 것은 테이블의 높이에 따라 첫 번째 행을 클릭하면 첫 번째 행이 스크롤되고 새 위치 (가운데)를 가져오고 다른 행에 대해서도 동일합니다. contenOffset을 시도했지만 작동하지 않았습니다 ..

편집 :

간단히 말해서 데이터 선택기와 같은 것은 선택기에서 행을 선택하면 행이 중앙으로 스크롤됩니다.

감사..

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다음과 같이 - (void)scrollToRowAtIndexPath:(NSIndexPath *)indexPath atScrollPosition:(UITableViewScrollPosition)scrollPosition animated:(BOOL)animated사용하면 작동합니다 .

NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];
[yourTableView scrollToRowAtIndexPath:indexPath 
                     atScrollPosition:UITableViewScrollPositionTop 
                             animated:YES];

atScrollPosition 다음 값 중 하나를 사용할 수 있습니다.

typedef enum {
UITableViewScrollPositionNone,
UITableViewScrollPositionTop,
UITableViewScrollPositionMiddle,
UITableViewScrollPositionBottom
} UITableViewScrollPosition;

도움이 되었기를 바랍니다.

건배

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[tableview scrollRectToVisible:CGRectMake(0, 0, 1, 1) animated:NO];

이것은 당신의 tableview를 첫 번째 행으로 가져갈 것입니다.

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마침내 나는 발견했다 ... 테이블이 3 행만 표시하면 잘 작동합니다 ... 행이 더 많이 변경되면 그에 따라 ...

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{    
    return 1;
}


// Customize the number of rows in the table view.
- (NSInteger)tableView:(UITableView *)tableView 
 numberOfRowsInSection:(NSInteger)section
{  
    return 30;
}

- (UITableViewCell *)tableView:(UITableView *)tableView 
         cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    if (cell == nil)
    {         
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault    
                                       reuseIdentifier:CellIdentifier] autorelease];
    }

    // Configure the cell.
    cell.textLabel.text =[NSString stringWithFormat:@"Hello roe no. %d",[indexPath row]];

    return cell;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell * theCell = (UITableViewCell *)[tableView     
                                              cellForRowAtIndexPath:indexPath];

    CGPoint tableViewCenter = [tableView contentOffset];
    tableViewCenter.y += myTable.frame.size.height/2;

    [tableView setContentOffset:CGPointMake(0,theCell.center.y-65) animated:YES];
    [tableView reloadData]; 
 }

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Use [tableView scrollToRowAtIndexPath:indexPath atScrollPosition:scrollPosition animated:YES]; Scrolls the receiver until a row identified by index path is at a particular location on the screen.

And

scrollToNearestSelectedRowAtScrollPosition:animated:

Scrolls the table view so that the selected row nearest to a specified position in the table view is at that position.

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Swift 4.2 version:

let indexPath:IndexPath = IndexPath(row: 0, section: 0)
self.tableView.scrollToRow(at: indexPath, at: .none, animated: true)

Enum: These are the available tableView scroll positions - here for reference. You don't need to include this section in your code.

public enum UITableViewScrollPosition : Int {

case None
case Top
case Middle
case Bottom
}

DidSelectRow:

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {

    let theCell:UITableViewCell? = tableView.cellForRowAtIndexPath(indexPath)

    if let theCell = theCell {
        var tableViewCenter:CGPoint = tableView.contentOffset
        tableViewCenter.y += tableView.frame.size.height/2

        tableView.contentOffset = CGPointMake(0, theCell.center.y-65)
        tableView.reloadData()
    }

}

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It is worth noting that if you use the setContentOffset approach, it may cause your table view/collection view to jump a little. I would honestly try to go about this another way. A recommendation is to use the scroll view delegate methods you are given for free.

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Simply single line of code:

self.tblViewMessages.scrollToRow(at: IndexPath.init(row: arrayChat.count-1, section: 0), at: .bottom, animated: isAnimeted)

참고URL : https://stackoverflow.com/questions/5856427/how-to-scroll-uitableview-to-specific-position