How do i increment during a Do-While loop?

I have the following code:

do {


    if ([[TBXML elementName:element] isEqualToString:@"wcqQuestionText"]) {
        UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(50, 100, 200, 100)];
        label.text = [TBXML textForElement:element];
        [scrollView addSubview:label];
        [label release];
        [formulierText removeFromSuperview];

    开发者_如何学C}

    // if the element has child elements, process them
    if (element->firstChild) 
        [self traverseElement:element->firstChild];

    // Obtain next sibling element
} while ((element = element->nextSibling));

Each time a label has been written, i want the next label to be positioned under the label that has just been created. How do i do this?

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Create float variable to track y position of label's frame and increase it each time label is added (you'll also need to adjust scroll's contentSize if all labels do not fit its frame):

static CGFloat y = 100.0f;

do {

    if ([[TBXML elementName:element] isEqualToString:@"wcqQuestionText"]) {
        UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(50, y, 200, 100)];
        label.text = [TBXML textForElement:element];
        [scrollView addSubview:label];
        [label release];
        [formulierText removeFromSuperview];
        y += 100.0f;
    }

    // if the element has child elements, process them
    if (element->firstChild) 
        [self traverseElement:element->firstChild];

    // Obtain next sibling element
} while ((element = element->nextSibling));

P.S. Have you considered using standard UITableView instead of self-tailored UIScrollView?