ios7---Lable自适应高度封装        +(UILabel *)getInfoLabel:(UILabel *)label withText:(NSString *)ktext withFont:(CGFloat )kfont withtosize:(CGRect)krect withBackGroundColor:(UIColor *)kbackgroundColor        {            //内容显示  高度自适应            CGSize sizeToFit =[ktext sizeWithFont:[UIFont systemFontOfSize:kfont]constrainedToSize:CGSizeMake(krect.size.width,10000)lineBreakMode:NSLineBreakByWordWrapping];                        CGRect labelframe = CGRectMake(krect.origin.x,krect.origin.y,sizeToFit.width, sizeToFit.height);            label.frame=labelframe;            label.numberOfLines=0;            label.lineBreakMode=NSLineBreakByTruncatingTail;            label.font=[UIFont systemFontOfSize:kfont];            label.text = ktext;            label.backgroundColor=kbackgroundColor;            label.textAlignment = NSTextAlignmentLeft;            label.textColor = [UIColor blackColor];            return label;        }                ios8---Lable自适应高度封装                +(UILabel *)getInfoLabel:(UILabel *)label withText:(NSString *)ktext withFont:(UIFont *)kfont withtosize:(CGRect)krect withBackGroundColor:(UIColor *)kbackgroundColor        {            label.numberOfLines =0;            UIFont * tfont =kfont;            label.font = tfont;            label.lineBreakMode =NSLineBreakByTruncatingTail ;            label.text =ktext;            //高度估计文本大概要显示几行，宽度根据需求自己定义。 MAXFLOAT 可以算出具体要多高            CGSize size =CGSizeMake(krect.size.width,10000);            NSDictionary * tdic = [NSDictionary dictionaryWithObjectsAndKeys:tfont,NSFontAttributeName,nil];            //ios7方法，获取文本需要的size，限制宽度            CGSize  actualsize =[ktext boundingRectWithSize:size options:NSStringDrawingUsesLineFragmentOrigin  attributes:tdic context:nil].size;            label.frame=CGRectMake(krect.origin.x,krect.origin.y,actualsize.width, actualsize.height);            label.backgroundColor=kbackgroundColor;            return label;        }