自动适配文字高度

//UILabel文字自适应 

- (UILabel *)titleL{
if(_titleL ==nil){

       _titleL = [[UILabel alloc] init];

      /**设置文字*/
        [_titleL setText:self.myMessModel.content];
        [_titleL setTextAlignment:NSTextAlignmentLeft];

    //文字颜色
        [_titleL setTextColor:[self.Skin getCellTitleColor]];
          _titleL.numberOfLines = 0; //多行
   //设置格式
        NSStringDrawingOptions options =  NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading;
        [_titleL setFont:[self.Skin getDefaultTextFont]];

  //SCREEN_SIZE.width 屏幕的宽度   WJ_HOME_LEFT_RIGHT_GAP间隙  MAXFLOAT 最大高度
        CGRect contentRect = [_titleL.text boundingRectWithSize:CGSizeMake(SCREEN_SIZE.width - 2*WJ_HOME_LEFT_RIGHT_GAP, MAXFLOAT) options:options attributes:@{NSFontAttributeName:         [self.Skin getDefaultTextFont]} context:nil];
        [_titleL setFrame:CGRectMake(WJ_HOME_LEFT_RIGHT_GAP, CGRectGetMaxY(self.timeL.frame), contentRect.size.width, contentRect.size.height)];

}
return _titleL;
}

//获取字符串的宽度
-(float) widthForString:(NSString *)value fontSize:(float)fontSize andHeight:(float)height

{ //此处的换行类型（lineBreakMode）可根据自己的实际情况进行设置

    CGRect sizeToFit = [value boundingRectWithSize:CGSizeMake(CGFLOAT_MAX, height) options:NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingUsesFontLeading attributes:@{NSFontAttributeName:[UIFont systemFontOfSize:fontSize]} context:nil];
    return sizeToFit.size.width;
}
//获得字符串的高度
-(float) heightForString:(NSString *)value fontSize:(float)fontSize andWidth:(float)width
{
    CGRect sizeToFit = [value boundingRectWithSize:CGSizeMake(CGFLOAT_MAX, width) options:NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingUsesFontLeading attributes:@{NSFontAttributeName:[UIFont systemFontOfSize:fontSize]} context:nil];
    return sizeToFit.size.height;
}