ios - 标签高度错误

Question

我正在尝试根据文本的长度获取标签的高度。但如果单词不能放在一行中 - 部分单词将转移到下一行。并且该方法仅返回一行的高度。谁能帮我吗？

- (CGFloat)heightFromText:(NSString *)text{
if (!text) {
    return 0.0;
}
UIFont *font = [UIFont systemFontOfSize:16.0];
UIColor *color = [UIColor colorWithColorCode:@"438fbe"];
NSMutableParagraphStyle *paragraphStyle = [NSMutableParagraphStyle alloc];
paragraphStyle.lineBreakMode = NSLineBreakByCharWrapping;
NSDictionary *attributes = @{NSForegroundColorAttributeName : color, NSFontAttributeName : font, NSParagraphStyleAttributeName : paragraphStyle};
NSAttributedString *attributed = [[NSAttributedString alloc] initWithString:text attributes:attributes];
CGRect needed = [attributed boundingRectWithSize:CGSizeMake(self.width, CGFLOAT_MAX) options:(NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingUsesFontLeading) context:nil];
CGFloat textHeight = ceilf(needed.size.height);
return textHeight;

Answer 1

试试 UILabel，像这样:

UILabel *lbl = [[UILabel alloc] initWithFrame:CGRectMake(x,y,w,h)];
lbl.font=font; 
lbl.numberOfLines=0; // will do as many lines as you need
lbl.textAlignment=NSTextAlignmentLeft;
lbl.attributedText=attString;

CGSize size = [lbl.text sizeWithFont:lbl.font
                       constrainedToSize:CGSizeMake(lbl.frame.size.width, MAXFLOAT)
                           lineBreakMode:NSLineBreakByWordWrapping];
return size.height;