CODEWITHSUNDEEP
iphone
Mike
Mike

Reputation:

UITableView clear data

How to clear whole tableview data and reload with new one?

Upvotes: 10

Views: 30692

Answers (8)

Milad Faridnia
Milad Faridnia

Reputation: 9477

Swift: Not sure it's the best way or not, But I'm using this code to clear and roload Data: 

fileprivate func clearTable() {
    self.tableviewData.removeAll(keepingCapacity: false)
    self.tableView.reloadData()
}

Upvotes: 0

user2260054
user2260054

Reputation: 522

By the way, clearsContextBeforeDrawing is a property, and 

[cell.contentView clearsContextBeforeDrawing];

does nothing except of returning its value.

Upvotes: 1

thebentwoods
thebentwoods

Reputation: 1

You can look at the value of the reused cell and if its not the same - then recreate it.

(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
MyLog(@"Start Table: cellForRowAtIndexPath: %d", indexPath.row);

NSString *MyIdentifier = [NSString stringWithFormat:@"MyIdentifier %i", indexPath.row];
UILabel *lblNew;
lblNew = [UILabel new];
UILabel *lblCell;
lblCell = [UILabel new];

MyTableCell *cell = (MyTableCell *)[tableView dequeueReusableCellWithIdentifier:MyIdentifier];

if (cell == nil) 
{
    cell = [[[MyTableCell alloc] initWithFrame:CGRectZero reuseIdentifier:MyIdentifier] autorelease];
    [cell.contentView addSubview:[lblNameArray objectAtIndex:indexPath.row]];       
} 
else 
{
    lblNew = [lblNameArray objectAtIndex:indexPath.row];
    for (id label in [cell.contentView subviews])   
    {
        if ([label isKindOfClass:[UILabel class]]) 
        {
            lblCell = label;
        }
    }
    if (![lblNew.text isEqualToString:lblCell.text])
    {
        cell = [[[MyTableCell alloc] initWithFrame:CGRectZero reuseIdentifier:MyIdentifier] autorelease];
        [cell.contentView addSubview:[lblNameArray objectAtIndex:indexPath.row]];
    }
}
return cell;

Upvotes: 0

andreas-supersmart
andreas-supersmart

Reputation: 4294

I had double entries on selection after scrolling. Now the Display is as clean as expected! Used the workaround

static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
cell = nil;

and also (btw: clearsContextBeforeDrawing as standalone it did not work

[cell.contentView clearsContextBeforeDrawing];

in Simulator i have the impression of more accurate reaction on cell selection. Thank you!

Upvotes: -1

Jerald
Jerald

Reputation: 345

ok.. but.. we need the solution for this.. if we add the cells in runtime, i have received the output with the same cells in first and last cells of the uitableview..

you can clear the cell before add any subviews

Example:

[mytableview.contentView clearsContextBeforeDrawing];

Upvotes: 0

Jacob KB
Jacob KB

Reputation: 31

This was my wrok around which worked. set cell = nil;

static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
cell = nil;

Upvotes: 3

joet3ch
joet3ch

Reputation: 2512

Clear your data before calling reloadData, and now the user will see the table get cleared and re-populated with fresh data.

myArray = nil;
[myTableView reloadData];

Upvotes: 25

Daniel
Daniel

Reputation: 22395

use [tableView reloadData] method on ui table view

Upvotes: 3

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