UITableView indexPathForSelectedRow example in Objective C (iOS).

UITableView indexPathForSelectedRow

Returns an index path identifying the row and section of the selected row.

- (NSIndexPath *)indexPathForSelectedRow

Return Value
An index path identifying the row and section indexes of the selected row or nil if the index path is invalid.

Discussion of [UITableView indexPathForSelectedRow]
If there are multiple selections, this method returns the first index-path object in the array of row selections; this object has the lowest index values for section and row.

UITableView indexPathForSelectedRow example.

UITableView's -indexPathForSelectedRow method will allow you to determine which row is selected:

NSIndexPath *selectionPath = [vwDrugTable indexPathForSelectedRow];
if (index) {
    NSLog(@"Selected row:%u in section:%u", [selectionPath row], [selectionPath section]);
} else {
    NSLog(@"No selection");
}
To be notified when the selection changes, implement tableView:didSelectRowAtIndexPath: in your table view delegate:

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSLog(@"Selection Changed");
}

Example of [UITableView indexPathForSelectedRow].

NSIndexPath *path = [table indexPathForSelectedRow];
if (path){
   row = [path row];
   ...
}
else{
 // No cell selected
}

UITableView indexPathForSelectedRow example.

So if you had some code like this, indexPathForSelectedRow would be nil,

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    if(![_self.tableView indexPathForSelectedRow])
    {
        NSLog(@"nothing selected, so selecting 1st one");
            // sets the detail pane here.
    }
}
but if the code was like this (note the viewWillAppear: at the end), then indexPathForSelectedRow would not be nil.

- (void)viewWillAppear:(BOOL)animated {
    if(![_self.tableView indexPathForSelectedRow])
    {
        NSLog(@"nothing selected, so selecting 1st one");
                // sets the detail pane here.
    }
    [super viewWillAppear:animated];
}

End of UITableView indexPathForSelectedRow example article.