ios - 从 tableview 的每个单元格中执行值的添加

Question

我正在开发一个购物应用程序，我可以在购物车中添加商品。现在我必须显示小计金额，我需要在表中执行每个项目的价格相加。

如何从每个单元格中选取值并相加？

下面是tableview的代码:

#pragma mark - Table view data source

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return  [CartList count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    NSDictionary *cellData = [[[CartList objectAtIndex:indexPath.row] valueForKey:@"AddtoCartProductImageModel"] firstObject];
    NSString *image=[cellData valueForKey:@"productimg"];
    NSString *urlString = [NSString stringWithFormat:@"http://dealnxt.com/areas/user/productimage/%@", image];
    NSURL *Url = [NSURL URLWithString:urlString];
    NSData *data = [NSData dataWithContentsOfURL:Url];

    NSString *CellData = [[CartList objectAtIndex:indexPath.row] valueForKey:@"shortdescription"];

    static NSString *simpleTableIdentifier = @"Cell";
    CartTableViewCell *cell = (CartTableViewCell *)[tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier forIndexPath: indexPath];
    cell.proimg.image=[UIImage imageWithData:data];
    cell.prlbl.lineBreakMode = NSLineBreakByWordWrapping;
    cell.prlbl.numberOfLines = 0;
    cell.prlbl.text=CellData;
    cell.prprice.text=[NSString stringWithFormat: @"₹%@",[[CartList objectAtIndex:indexPath.row] valueForKey:@"price"]];
    cell.quantity.text=[NSString stringWithFormat:@"%@",[[CartList objectAtIndex:indexPath.row] valueForKey:@"quantity"]];


  NSString *string =[NSString stringWithFormat: @"%@",[[CartList objectAtIndex:indexPath.row] valueForKey:@"price"]];
  int value = [string intValue];

  for (int i=0; i<=[CartList count]; i++) {

    int Total=0;
    Total=+value;
    NSLog(@"total:%d",Total);
}

    return cell;
}

prprice 是我需要添加的。

Answer 1

    //  write this code somewhere where you fill the CartList variable value.

float tot;
for (int i = 0; i < [CartList count]; i++)
{

tot = tot +  [[[CartList objectAtIndex:i] valueForKey:@"price"] floatValue];
    // Do stuff...
}
NSLog("Total Cost : ₹ %.2f",tot);