How to deal with two TableView

问题

I have two instances of UITableView in one app, and the problem is that I don't know how to define what each table needs to display. Here's the code:

.h :

{
NSArray *array1;
NSArray *array2;
IBOutlet UITableView *table1;
IBOutlet UITableView *table2;
}

.m :

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [array1 count];
}

- (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.textLabel.text = [array1 objectAtIndex:indexPath.row];
    return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{

    UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
}

This code is working for just one table. I don't know how to set up the other table with array2. Have you got any ideas, people?

回答1:

All you need to do is check which UITableView you are setting up in the delegate/datasource methods. Try:

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView; {
  if(tableView == table1){
    return 1; // The number of sections in table1;
  }
else if(tableView == table2){
    return 1; // The number of sections in table2;
  }
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section; {
  if(tableView == table1){
    return [array1 count];
  }
  else if(tableView == table2){
    return [array2 count];
  }
}

- (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];
  }
  if(tableView == table1){
    cell.textLabel.text = [array1 objectAtIndex:indexPath.row];;
  }
  else if(tableView == table2){
    cell.textLabel.text = [array2 objectAtIndex:indexPath.row];;
  }
  return cell;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath; {
  UITableViewCell * cell = [tableView cellForRowAtIndexPath:indexPath];
}

Hope that Helps!

回答2:

On UITableViewDataSource methods you have to compare your ivars with the delegates.

like this:

    - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    if([tableView isEqual:table1])
    {
          return [array1 count];
    }
    else if([tableView isEqual:table2])
    {
          return [array2 count];
    }
    else
    {
          return 0;
    }
}

Do this for every method in the callback.

But I would recommend having only one tableView and load different contents in it based on some flag. You would have to call [tableView reloadData] in order for this to function and set a flag. Then you would change the above code like this if([flag isEqualToString:@"table1"]) { //code for table1 }

Unless you have two tables on the same View. Then the first method is what you should do.

回答3:

The normal way to do this is to create separate datasource/delegate objects for each table view. They don't have to be separate classes. They can be two instances of the same class.

来源：https://stackoverflow.com/questions/9318098/how-to-deal-with-two-tableview