Question

我在同一个视图中一个接一个地加载两个tableViews（ScrollView）。但是当我尝试滚动第一个tableView然后将它的单元格（第一个和最后一个）内容更改为第二个tableViews单元格时加载它们（第一个和最后一个）content.Could不明白我哪里出错了？

这是我正在处理的代码：

- (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;



    }

    }

我哪里出错？

2 ..当tableView2为空时，ScrollView仅加载tableView1.Then当我尝试滚动tableView1然后我收到错误：Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSArrayI objectAtIndex:]: index 0 beyond bounds for empty array' 在这一行tableView2

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

我怎样才能实现目标？

Answer 1

作为您的第一点，您需要CellIdentifier替换为

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

和

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

和第二点错误说你已经从placesArray中设置cell.textLabel.text，在任何索引中没有任何数据或密钥，如name，你的数组为Nil，这就是你的应用在滚动时遇到崩溃的原因

滚动tableview会更改单元格内容

1 个答案: