ios - 如何在tableview中同时插入多行？

Question

我想在一个 TableView 中的最后一行的前面同时插入很多行，但是它在最后一行前面加了一行，最后又加了两行。如何弄清楚？请帮助我，提前谢谢你。 !

- (void)morePicture:(id)sender{
    NSMutableArray *indexPaths = [[NSMutableArray alloc] init];
    for (int i=0; i<3; i++) {
        NSString *s = [[NSString alloc] initWithFormat:@"%d",i];
        [photos addObject:s];
        NSIndexPath *indexpath = [NSIndexPath indexPathForRow:i inSection:0];
        [indexPaths addObject:indexpath];
   }

   [table beginUpdates];
   [table insertRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationNone];
   [table endUpdates];

   [table reloadData];
}

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Answer 1

- (void)morePicture:(id)sender {
    // See how many rows there are already:
    NSUInteger rowCount = [table numberOfRowsInSection:0]
    NSMutableArray *indexPaths = [[NSMutableArray alloc] init];
    for (int i=0; i<3; i++) {
        NSString *s = [[NSString alloc] initWithFormat:@"%d",i];
        [photos addObject:s];
        // The new index path is the original number of rows plus i - 1 to leave the last row where it is. 
        NSIndexPath *indexpath = [NSIndexPath indexPathForRow:i+rowCount - 1 inSection:0];
        [indexPaths addObject:indexpath];
    }

    [table beginUpdates];
    [table insertRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationNone];
    [table endUpdates];

    [table reloadData];
}