设置行间距，自适应文字大小

 

/**
 *  设置富文本(大小)
 *
 *  @param neirong   字符串
 *  @param lineSpace 行间距
 *
 *  @return NSMutableAttributedString
 */
+(NSMutableAttributedString *)attributedString:(NSString *)neirong space:(NSInteger)lineSpace font:(NSInteger)font;

/**
 *  计算富文本大小
 *
 *  @param width     宽度
 *  @param neirong   字符串
 *  @param lineSpace 行距
 *
 *  @return CGRect
 */

+ (CGRect)boundingRectWithSize:(NSInteger)width attributedString:(NSString *)neirong space:(NSInteger)lineSpace font:(NSInteger)font;

 

+(NSMutableAttributedString *)attributedString:(NSString *)neirong space:(NSInteger)lineSpace font:(NSInteger)font{
    NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:neirong];
    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
    [paragraphStyle setLineSpacing:lineSpace];//调整行间距
    [attributedString setAttributes:@{NSParagraphStyleAttributeName:paragraphStyle,NSFontAttributeName:[UIFont systemFontOfSize:font],} range:NSMakeRange(0, [neirong length])];
    return attributedString;
}

+(CGRect)boundingRectWithSize:(NSInteger)width attributedString:(NSString *)neirong space:(NSInteger)lineSpace font:(NSInteger)font{
    CGRect rect = [[Common attributedString:neirong space:lineSpace font:font] boundingRectWithSize:CGSizeMake(width, 2000) options:NSStringDrawingUsesLineFragmentOrigin context:nil];
    return rect;
}

效果图：