ios - UIScrollview 不滚动 iOS

Question

我在一个水平滚动的 View 中创建多个 ScrollView 。以下代码工作正常:

-(void)updateSection {
    builder = [NSMutableArray array];
    float xPosition = 0;
    float xposbut = 100;

    scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 100, self.frame.size.width, self.frame.size.height - 69)];

    scrollView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
    scrollView.delegate = self;
    [self addSubview:scrollView];

    for (int i = 1; i < itemArticleArray.count; i++) {
        ItemView *item = [ItemView loadNibs];
        item.frame = CGRectMake(xposbut, 10, item.frame.size.width, item.frame.size.height);

        xPosition += scrollView.frame.size.width + 2;
        xposbut += 500;
        UIView *seperatorView = [[UIView alloc] initWithFrame:CGRectMake(xposbut - 50, 4, 2, scrollView.frame.size.height - 8)];
        [scrollView addSubview:seperatorView];
        xPosition += scrollView.frame.size.width + 4;

        [scrollView addSubview: item];
        [builder addObject:item];
    }

    [scrollView setContentSize:CGSizeMake(xposbut, scrollView.frame.size.height)];
    [self addSubview:scrollView];
}

但是，当我将第 8 行代码更改为以下内容时:

scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 400, self.frame.size.width, self.frame.size.height - 69)];

它使布局看起来不错，但 ScrollView 根本不滚动。有什么想法吗？

Answer 1

您将 contentSize.height 设置为 scrollView.frame.size.height，因此 scrollView 无法滚动。您必须将 contentSize 设置为 scrollView 的总高度，包括不可见区域。框架只是屏幕上的区域。