iOS 计算label的高度

+ (CGFloat)labelHeight:(UILabel *)label lines:(NSInteger)lines

{

    NSRange range = NSMakeRange(0, label.attributedText.length);

    NSDictionary *dic = [label.attributedText attributesAtIndex:0 effectiveRange:&range];

    CGSize size = CGSizeMake(label.bounds.size.width, 10000);

    CGFloat height = [label.text boundingRectWithSize:size options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading attributes:dic context:nil].size.height;

    return height + 10.0f * lines;

}

iOS 计算label的高度

原文：http://www.cnblogs.com/fantasy3588/p/4627262.html