根据Label的内容,计算label的尺寸或者高度

CGFloat nameX = CGRectGetMaxX(_iconFrame) + space;
CGFloat nameY = iconY;
NSDictionary *nameAtt = @{NSFontAttributeName : XMGNameFont};
// 知道文字，知道文字大小，求这段文字的尺寸
CGSize nameSize = [_name sizeWithAttributes:nameAtt];
_nameFrame = CGRectMake(nameX, nameY, nameSize.width, nameSize.height);


CGFloat textX = iconX;
CGFloat textY = CGRectGetMaxY(_iconFrame) + space;
CGFloat textW = width - 2 * space;
CGSize maxTextSize = CGSizeMake(textW, MAXFLOAT);
NSDictionary *textAtt = @{NSFontAttributeName : XMGTextFont};
// 知道文字，知道文字的宽度，求文字的高度
CGFloat textH = [_text boundingRectWithSize:maxTextSize options:NSStringDrawingUsesLineFragmentOrigin attributes:textAtt context:nil].size.height;
_textFrame = CGRectMake(textX, textY, textW, textH);