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：