Question

我有以下代码：

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];

    }

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

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

每次写入标签时，我都希望下一个标签位于刚刚创建的标签下。我该怎么做？

Answer 1

创建浮点变量以跟踪标签框架的y位置，并在每次添加标签时增加它（如果所有标签都不适合其框架，您还需要调整滚动的contentSize）：

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。您是否考虑过使用标准的UITableView而不是自定义的UIScrollView？

如何在Do-While循环期间递增？

1 个答案: