Display multiple custom cells in a UITableView?

问题

I am using Xcode 4.2 on SnowLeopard, and my project is using storyboards. I am trying to implement a UITableView with 2 different custom cell types, sessionCelland infoCell. I can get the 2 types to appear within the same list, but now I have a new problem?! The sessionCell is displayed once, and then X number of infoCells are displayed after it - just as I wanted - except that the first infoCell is always overwritten by the sessionCell!

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

//inside cellForRowAtIndexPath
    if(indexPath.row == 0) {
cell = [tableView dequeueReusableCellWithIdentifier:@"sessionCell"];
} else {
cell = [tableView dequeueReusableCellWithIdentifier:@"infoCell"];
}
...
return cell;

I've tried to say return array count + 1, or even hardcoded return 7 (it fits my example) but both are incorrect!

myObject *person = [self.people objectAtIndex:indexPath.row];

Or does my problem lie in the above line? I've even tried indexPath.row+1...

Any help would be greatly appreciated!!

回答1:

If I understand your question correctly, the first infoCell (second UITableView row) should display the first person object's data, right?

Then it seems you want:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *sessionCellID = @"sessionID";
    static NSString *infoCellID = @"infoID";

    if( indexPath.row == 0 ) {
        SessionCellClass *cell = nil;
        cell = (SessionCellClass *)[tableView dequeueReusableCellWithIdentifier:sessionCellID];
        if( !cell ) {
            //  do something to create a new instance of cell
            //  either alloc/initWithStyle or load via UINib
        }
        //  populate the cell with session model
        return cell;
    }
    else {
        InfoCellClass *cell = nil;
        cell = (InfoCellClass *)[tableView dequeueReusableCellWithIdentifier:infoCellID];
        if( !cell ) {
            //  do something to create a new instance of info cell
            //  either alloc/initWithStyle or load via UINib
            // ...

            //  get the model object:
            myObject *person = [[self people] objectAtIndex:indexPath.row - 1];

            //  populate the cell with that model object
            //  ...
            return cell;
        }
    }

and you need to return [[self people] count] + 1 for the row count:

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [[self people] count] + 1;
}

so that the n'th row shows the (n-1)th data.

回答2:

if you look at the if else section it shows that the first row is an "sessionCell" and all other rows are "infoCells" what i think you want to do is make the first row an sessionCell, the second row an infoCell and all of the other rows peopleCells

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [self.people count] + 2; // Added two for sessionCell & infoCell
}

//inside cellForRowAtIndexPath
if(indexPath.row == 0) {
    cell = [tableView dequeueReusableCellWithIdentifier:@"sessionCell"];
} else if (indexPath.row == 1 {
    cell = [tableView dequeueReusableCellWithIdentifier:@"infoCell"];
} else {
    cell = [tableView dequeueReusableCellWithIdentifier:@"personCell"];
    Person *person = [self.people objectAtIndex:index.path.row - 2];
}

...
return cell;

Better yet, I would try to make two different sell sections, one for info and one for people

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 2;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return section == 0 ? 2 : self.people.count
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell = nil;
    if (indexPath.section == 0) {
        if(indexPath.row == 0) {
            cell = [tableView dequeueReusableCellWithIdentifier:@"sessionCell"];
            // configure session cell
        } else if (indexPath.row == 1 {
            cell = [tableView dequeueReusableCellWithIdentifier:@"infoCell"];
            // configure info cell
        }
    } else {
         cell = [tableView dequeueReusableCellWithIdentifier:@"infoCell"];
         Person *person = [self.people objectAtIndexPath:indexPath.row];
         // configure person cell
    }

    return cell;
}

来源：https://stackoverflow.com/questions/9551093/display-multiple-custom-cells-in-a-uitableview