UITableView load more when scrolling to bottom like Facebook application

Question

I am developing an application that uses SQLite. I want to show a list of users (UITableView) using a paginating mechanism. Could any one please tell me how to load more dat

Answer 1

Just wanna share this approach:

- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
    NSLog(@"%@", [[YourTableView indexPathsForVisibleRows] lastObject]);
    [self estimatedTotalData];
}

- (void)estimatedTotalData
{
    long currentRow = ((NSIndexPath *)[[YourTableView indexPathsForVisibleRows] lastObject]).row;

    long estimateDataCount = 25;

    while (currentRow > estimateDataCount)
    {
        estimateDataCount+=25;
    }

    dataLimit = estimateDataCount;

    if (dataLimit == currentRow+1)
    {
        dataLimit+=25;
    }

    NSLog(@"dataLimit :%ld", dataLimit);

    [self requestForData];

    // this answers the question..
    //
    if(YourDataSource.count-1 == currentRow)
    {
        NSLog(@"LAST ROW"); //loadMore data
    }
}

NSLog(...); output would be something like:

 {length = 2, path = 0 - 92}
dataLimit :100
 {length = 2, path = 0 - 83}
dataLimit :100
 {length = 2, path = 0 - 79}
dataLimit :100
 {length = 2, path = 0 - 71}
dataLimit :75
 {length = 2, path = 0 - 59}
dataLimit :75
 {length = 2, path = 0 - 56}
dataLimit :75
 {length = 2, path = 0 - 39}
dataLimit :50
 {length = 2, path = 0 - 36}
dataLimit :50
 {length = 2, path = 0 - 1}
dataLimit :25
 {length = 2, path = 0 - 1}
dataLimit :25

This is good for displaying data stored locally. Initially I declare the dataLimit to 25, that means uitableview will have 0-24 (initially).

If the user scrolled to the bottom and the last cell is visible dataLimit will be added with 25...

Note: This is more like a UITableView data paging, :)