Question

1. I’m loading two tableViews separately one after the other in a same view (ScrollView).But after loading them when I try to scroll the first tableView then its cell(1st and last) contents are changed to second tableViews cell(1st and last) content.Couldn’t understand where I m going wrong?

This is the code Im working on:

- (void)viewDidLoad
{
      self.tableView1=[[UITableView alloc] initWithFrame:CGRectMake(10,10,310,250) style:UITableViewStylePlain];
        self.tableView1.delegate=self;
        self.tableView1.dataSource=self;
        self.tableView1.rowHeight=80;
        self.tableView1.scrollEnabled = YES;
        currenttableView=@"1";
        [testscroll addSubview:self.tableView1];
 [self performSelector:@selector(callWebserviceMethod) withObject:nil afterDelay:0];
}
-(void)callWebserviceMethod
{
  self.tableView2=[[UITableView alloc] initWithFrame:CGRectMake(10,self.tableView1.frame.origin.y+self.tableView1.frame.size.height+6,310,230) style:UITableViewStylePlain];
        self.tableView2.delegate=self;
        self.tableView2.dataSource=self;
        self.tableView2.rowHeight=80;
         currenttableView=@"2";
        self.tableView2.scrollEnabled = YES;
        [testscroll addSubview:self.tableView2];
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{


    static NSString *CellIdentifier=@"Cell";

    UITableViewCell* cell=[tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    if(cell == nil)
    {
        cell = [[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault    reuseIdentifier:CellIdentifier]autorelease];

    }
    cell.accessoryType= UITableViewCellAccessoryDetailDisclosureButton;
    cell.selectionStyle = UITableViewCellSelectionStyleNone;


    if(currenttableView==@"1")
    {


        cell.textLabel.text = [[filtered objectAtIndex:indexPath.row] objectForKey:@"CompanyName"] ;   //filtered is NSMutableArray
        cell.textLabel.tag=3;
        cell.textLabel.font=[UIFont boldSystemFontOfSize:12];


        UIButton *showDirections = [UIButton buttonWithType:UIButtonTypeRoundedRect];
        showDirections.frame = CGRectMake(10.0f, 52.0f, 85.0f, 20.0f);
        [showDirections setTitle:@"Direction" forState:UIControlStateNormal];
        [showDirections setTag:indexPath.row];
        [showDirections.titleLabel setFont:[UIFont fontWithName:@"Helvetica-Bold" size:12]];
        showDirections.backgroundColor=[UIColor lightTextColor];
        [ showDirections setBackgroundImage:[UIImage imageNamed:@"background-button.png"] forState:UIControlStateNormal];
        showDirections.titleLabel.textColor=[UIColor whiteColor];

        [cell addSubview:showDirections];
        [showDirections addTarget:self action:@selector(showDirectionsfordC:)forControlEvents:UIControlEventTouchUpInside];



        return cell;

    }


     if(currenttableView==@"2")
    {


        cell.textLabel.text = [[places objectAtIndex:indexPath.row] objectForKey:@"name"] ;    //places is NSMutableArray
        cell.textLabel.lineBreakMode=UILineBreakModeWordWrap;
        cell.textLabel.numberOfLines=0;
        cell.textLabel.font=[UIFont boldSystemFontOfSize:12];
        cell.textLabel.tag=3;




        UIButton *showDirections = [UIButton buttonWithType:UIButtonTypeRoundedRect];
        showDirections.frame = CGRectMake(10.0f, 52.0f, 85.0f, 20.0f);
        [showDirections setTitle:@"Direction" forState:UIControlStateNormal];
        [showDirections setTag:indexPath.row];
        [showDirections.titleLabel setFont:[UIFont fontWithName:@"Helvetica-Bold" size:12]];
        showDirections.backgroundColor=[UIColor lightTextColor];
        [ showDirections setBackgroundImage:[UIImage imageNamed:@"background-button.png"] forState:UIControlStateNormal];
        showDirections.titleLabel.textColor=[UIColor whiteColor];

        [cell addSubview:showDirections];
        [showDirections addTarget:self action:@selector(showDirections:)forControlEvents:UIControlEventTouchUpInside];

        NSString *vicinity1 = [[places objectAtIndex:indexPath.row]objectForKey:@"vicinity"];
        UILabel *vicinity = [[UILabel alloc]initWithFrame:CGRectMake(10, 45, 320, 10)];
        vicinity .font=[UIFont fontWithName:@"TimesNewRomanPS-BoldMT" size:12];
        [vicinity  setTextAlignment:UITextAlignmentLeft];
        vicinity.text=[NSString stringWithFormat:@"%@",vicinity1];

        vicinity.tag=4;
        [cell addSubview:vicinity ];
        vicinity.hidden=YES;
        [vicinity release];

        return cell;



    }

    }

Where I m going wrong?

2.. When tableView2 is empty then ScrollView loads with only tableView1.Then at that time when I try to scroll tableView1 then I m getting error :Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSArrayI objectAtIndex:]: index 0 beyond bounds for empty array'
at this line of tableView2

cell.textLabel.text = [[places objectAtIndex:indexPath.row] objectForKey:@"name"] ;//error

How can I get it going?

Answer 1

as par your First point you need to your CellIdentifier replace with

  NSString *CellIdentifier =[NSString stringWithFormat:@"%d",indexPath.row];

and

cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];

and second point Error says you have set cell.textLabel.text from placesArray that have no any Data or key like name at any index your Array is Nil that’s why your app Getting Crash while scrolling