Question

I need to create a table with custom cell’s, which have different size (Height).
Can i change the size of a row just from one or two cell??
Any idea how??

Thanks

Answer 1

create a mutable array that contains the heights of all of your rows, if you’ve got multiple sections, you can put multiple arrays inside a mutable array. let’s say you’ve got 2 sections and 2 rows for each, then give your table view controller a property:

@property (nonatomic, retain) NSMutableArray *heightData;

in the .m file:

- (NSMutableArray *)heightData
{
    if(nil == heightData)
    {
        heightData = [[NSMutableArray array] retain];

        //various heights for your different rows in different sections:
        NSMutableArray *sectionArray1 = [NSMutableArray arrayWithObjects:[NSNumber numberWithFloat:44],[NSNumber numberWithFloat:44]];
        NSMutableArray *sectionArray2 = [NSMutableArray arrayWithObjects:[NSNumber numberWithFloat:44],[NSNumber numberWithFloat:44]];

        [heightData addObject:sectionArray1];
        [heightData addObject:sectionArray2];
    }

    return heightData;
}

then, in your table view controller .m file, there’s a protocol method that we must make use of, you can implement it like this:

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSMutableArray *rowArray = [self.heightData objectAtIndex:indexPath.section];
    NSNumber *height = [rowArray objectAtIndex:indexPath.row];
    return [height floatValue];
}

the final step: when you want to change a height for a row, let’s say it’s the row in section 1, row 0, then you can do this:

NSMutableArray *rowArray = [self.heightData objectAtIndex:1];
[rowArray replaceObjectAtIndex:0 withObject:[NSNumber numberWithFloat:55]];\\a new data
[self.tableView beginUpdates];
[self.tableView endUpdates];

then the table view’s going to resize the row with a smooth animation, you can explicitly resize and re-layout the views inside the row, but I don’t recommend that, the table view’ll automatically do this for you if you’ve got a custom-xib cell and the autoresizing settings are set properly