调整大小后从 UILabel 获取 numberOfLines

发布于 2024-10-30 02:26:19 字数 851 浏览 2 评论 0原文

我这样做是为了制作我的 UIlabel，将 numberOfLines 设置为 0，以便它没有行限制：

    UILabel *nmLbl = [[UILabel alloc] initWithFrame:CGRectZero];
    [nmLbl setFont:[UIFont boldSystemFontOfSize:16.0f]];
    [nmLbl setNumberOfLines:0];
    [self addSubview:nmLbl];
    [nmLbl release];

稍后，当我知道哪个字符串进入标签时，我像这样调整它的大小：

    nameSize = [[self name] sizeWithFont:[UIFont boldSystemFontOfSize:16.0f] constrainedToSize:maxNameSize lineBreakMode:UILineBreakModeWordWrap];
    [self.nameLabel setFrame:CGRectMake(0.0f, 0.0f, nameSize.width, nameSize.height)];
    [self.nameLabel sizeToFit];

现在，对于我的特定用途，我需要知道这最终需要多少行。

如果我访问 UILabel 的 numberOfLines 属性，它将始终返回 0。

有没有办法让我直接访问 UILabel 最终没有多少行必须再次通过 label.size.height / fontHeight 来计算它吗？

先感谢您。

原文

I do this to make my UIlabel, setting the numberOfLines to 0 so that it has no line-limit:

    UILabel *nmLbl = [[UILabel alloc] initWithFrame:CGRectZero];
    [nmLbl setFont:[UIFont boldSystemFontOfSize:16.0f]];
    [nmLbl setNumberOfLines:0];
    [self addSubview:nmLbl];
    [nmLbl release];

Later on, when I know which string goes into the label, I size it like this:

    nameSize = [[self name] sizeWithFont:[UIFont boldSystemFontOfSize:16.0f] constrainedToSize:maxNameSize lineBreakMode:UILineBreakModeWordWrap];
    [self.nameLabel setFrame:CGRectMake(0.0f, 0.0f, nameSize.width, nameSize.height)];
    [self.nameLabel sizeToFit];

Now, for my particular use, I need to know how many lines this ends up taking.

If I access the numberOfLines property of the UILabel it will always return 0.

Is there a way for me to directly access how many lines the UILabel ended up being without
having to calculate it, again, by going label.size.height / fontHeight?

Thank you in advance.

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