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我有一个使用 mysql 数据库中的名称填充的表视图,我想通过离用户位置最近的距离来过滤表。我检索的数据具有我想用作距离的坐标值。

Route * routeObject; //data from mysql

CGFloat latitude = [routeObject.startLat doubleValue];
CGFloat longitude = [routeObject.startLong doubleValue];

CLLocationCoordinate2D startCoord = CLLocationCoordinate2DMake(latitude, longitude);

我得到这样的用户位置:

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
    if (newLocation)
    {
        if ((oldLocation.coordinate.latitude != newLocation.coordinate.latitude) &&
           (oldLocation.coordinate.longitude != newLocation.coordinate.longitude))

            self.userCoord = [NSString stringWithFormat:@"%f,%f",newLocation.coordinate.latitude, newLocation.coordinate.longitude];
    NSLog(@"%@", self.userCoord);
    }
}

现在我在过滤表格时遇到了麻烦,我不知道/不明白如何按到用户位置的距离来组织单元格有什么想法吗?

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];

    Route * routeObject;
    routeObject = [routesArray objectAtIndex:indexPath.row];
    cell.textLabel.text = routeObject.name;
    cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;

    return cell;
}
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