单击另一个单元格时，将UITableViewCell折叠为原始大小 [英] Collapse UITableViewCell to original size when another cell is clicked

问题描述

此问题与以下问题有关:

This question is connected to the following question: Can you animate a height change on a UITableViewCell when selected?

我通过使用以下代码来动画化该问题中说明的UITableViewCell的高度变化:

I am animating the height change of the UITableViewCell explained in that question by using the following code:

    - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {


    ProductCell *cell = (ProductCell *) [tableView cellForRowAtIndexPath:indexPath];

    // Deselect cell
    [tableView deselectRowAtIndexPath:indexPath animated:NO];

    // Toggle 'selected' state
    BOOL isSelected = ![self cellIsSelected:indexPath];


    // Store cell 'selected' state keyed on indexPath
    NSNumber *selectedIndex = [NSNumber numberWithBool:isSelected];
    [self.selectedIndexes setObject:selectedIndex forKey:indexPath];


    if (isSelected) {

        cell.addButton.hidden = NO;

    }else {


        cell.addButton.hidden = YES;

   }

    // This is where magic happens...
    [self.theMenuListTableView beginUpdates];

    [self.theMenuListTableView endUpdates];

}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
    // If our cell is selected, return double height
    if([self cellIsSelected:indexPath]) {
        return kCellHeight * 2.0;
    }

    // Cell isn't selected so return single height
    return kCellHeight;
}

- (BOOL)cellIsSelected:(NSIndexPath *)indexPath {

    NSNumber *selectedIndex = [self.selectedIndexes objectForKey:indexPath];
    return selectedIndex == nil ? FALSE : [selectedIndex boolValue];
}

这可以正常工作，但是我想要的是，当单击一个单元格并且对高度进行动画处理后，再单击另一个单元格时，我希望第一个单元格收缩/收缩到其原始大小，并且其他展开(动画高度变化).我怎样才能做到这一点?

This is working fine, but want I want is, that when one cell is clicked and the height has been animated, and I then click on another cell, I want the first cell to contract/collapse to it's original size and the other to expand (animate the height change). How can I do this?

推荐答案

也许有帮助:

- (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 = [NSString stringWithFormat:@"%d",indexPath.row];
    cell.selectionStyle = UITableViewCellEditingStyleNone;
    return cell;
}

- (int) tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return 3;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    [tableView reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationMiddle];

    if (indexPath.row > 0) {
        NSIndexPath *path = [NSIndexPath indexPathForRow:indexPath.row - 1 inSection:indexPath.section];
        [tableView reloadRowsAtIndexPaths:@[path] withRowAnimation:UITableViewRowAnimationNone];
    }
}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
    // If our cell is selected, return double height
    if([self cellIsSelected:indexPath]) {
        return 40 * 2.0;
    }

    // Cell isn't selected so return single height
    return 40;
}

- (BOOL)cellIsSelected:(NSIndexPath *)indexPath {
    return (tblView.indexPathForSelectedRow.row == indexPath.row);
}

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