iphone - 向滚动视图添加标签

Question

我正在尝试将标签添加到滚动视图，然后设置滚动视图的 contentSize 以匹配所需的标签大小。问题是我似乎必须使 contentSize 大于标签的大小：

theScrollview = [[UIScrollView alloc] initWithFrame:CGRectMake(0,0,320,480)];
bodyLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 320.0, 50.0)];
bodyLabel.textColor = [UIColor whiteColor];
bodyLabel.backgroundColor = [UIColor clearColor];
bodyLabel.textAlignment = UITextAlignmentLeft;
bodyLabel.text = event.description; <- basically some long ass text here
bodyLabel.font=[UIFont systemFontOfSize:16.0];

bodyLabel.numberOfLines = 0;
bodyLabel.lineBreakMode = UILineBreakModeWordWrap;

在这里我想我得到了必要的标签大小来包含文本

CGSize size = [event.description sizeWithFont:bodyLabel.font constrainedToSize:CGSizeMake(bodyLabel.frame.size.width, 9500) lineBreakMode:bodyLabel.lineBreakMode];

frame = bodyLabel.frame; // to get the width
frame.size.height = size.height;    
bodyLabel.frame = frame;

这里我将 contentSize 设置为标签的 Size，但是不够大，我需要将其设置为 bodyLabel.frame.size.height + 80 才能被滚动覆盖。

theScrollview.contentSize = CGSizeMake(bodyLabel.frame.size.width, bodyLabel.frame.size.height);
[theScrollview addSubview:bodyLabel];

感谢您提前提出任何想法！

Answer 1

[theScrollview addSubView: bodyLabel];