UITableView防止重用

防止重用方法一:
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    替换为:
    UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath]; //根据indexPath准确地取出一行，而不是从cell重用队列中取出
     防止重用方法二:
     static NSString* cellIdentifier = @"cell";
     替换为:
     NSString *cellIdentifier = [NSString stringWithFormat:@"Cell%ld%ld", (long)[indexPath section], (long)[indexPath row]];