| 标题 | 设置IOS的UILabel动态高度方法 |
| 范文 | 开始的时候按钮事件中，可能写的是这样一段代码： if (isExpand) { [lblBrief setNumberOfLines:2]; lblBrief.text = [StringUtil subString:strBrief AndSubLength:90]; [btnBrief setImage:[UIImage imageNamed:@"detailBriefDown"] forState:UIControlStateNormal]; [btnBrief setImage:[UIImage imageNamed:@"detailBriefDown"] forState:UIControlStateHighlighted]; }else{ [lblBrief setNumberOfLines:0]; lblBrief.text = strBrief; [btnBrief setImage:[UIImage imageNamed:@"detailBriefUp"] forState:UIControlStateNormal]; [btnBrief setImage:[UIImage imageNamed:@"detailBriefUp"] forState:UIControlStateHighlighted]; } 可以通过setNumberOfLines:0,来让概述的所以内容显示出来，但如果，不计算所要显示全部内容的总高度，label的宽高是不会自动增大的。 else{ [lblBrief setNumberOfLines:0]; lblBrief.text = strBrief; CGSize constraint = CGSizeMake(self.view.frame.size.width - (15 * 2), 20000.0f); CGSize size = [strBrief sizeWithFont:[UIFont systemFontOfSize:10]constrainedToSize:constraint lineBreakMode:UILineBreakModeWordWrap]; [brief setFrame:CGRectMake(15,160,size.width,size.height)]; [btnBrief setImage:[UIImage imageNamed:@"detailBriefUp"]forState:UIControlStateNormal]; [btnBrief setImage:[UIImage imageNamed:@"detailBriefUp"]forState:UIControlStateHighlighted]; } |
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