@interface UILabel (ChangeLineSpaceAndWordSpace)
//1.设置：行间距
+ (void)changeLineSpaceForLabel:(UILabel *)label WithSpace:(float)space;

//2.设置：字间距
+ (void)changeWordSpaceForLabel:(UILabel *)label WithSpace:(float)space;

//3.设置：行间距 与 字间距
+ (void)changeSpaceForLabel:(UILabel *)label withLineSpace:(float)lineSpace WordSpace:(float)wordSpace;
@end

//传入需要设置的 Label 与需要设置的行间距数值
+ (void)changeLineSpaceForLabel:(UILabel *)label WithSpace:(float)space {
 NSString *labelText = label.text;
 NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:labelText];
 NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
 [paragraphStyle setLineSpacing:space];
 [attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [labelText length])];
 label.attributedText = attributedString;
 [label sizeToFit];
}

//传入需要设置的 Label 与需要设置的字间距数值
+ (void)changeWordSpaceForLabel:(UILabel *)label WithSpace:(float)space {
 NSString *labelText = label.text;
 NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:labelText attributes:@{NSKernAttributeName:@(space)}];
 NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
 [attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [labelText length])];
 label.attributedText = attributedString;
 [label sizeToFit];
}

//传入需要设置的 Label 与需要设置的行间距数值与字间距数值
+ (void)changeSpaceForLabel:(UILabel *)label withLineSpace:(float)lineSpace WordSpace:(float)wordSpace {
 NSString *labelText = label.text;
 NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:labelText attributes:@{NSKernAttributeName:@(wordSpace)}];
 NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
 [paragraphStyle setLineSpacing:lineSpace];
 [attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [labelText length])];
 label.attributedText = attributedString;
 [label sizeToFit];
}

//设置label内容，将lable内容变为有间距的内容
 testLabel.text = @"测试文字测试文字测试文字测试文字测试文字测试文字测试文字测试文字测试文字测试文字测试文字测试文字测试文字测试文字测试文字";
 [UILabel changeLineSpaceForLabel:testLabel WithSpace:20];//设置testLabel中内容的行间距为20
 [UILabel changeWordSpaceForLabel:self.testLabel WithSpace:20];//设置testLabel中内容的字间距为20
// 
 [UILabel changeLineSpaceForLabel:self.testLabel WithSpace:20];//设置testLabel中内容的行间距为20，字间距为20

- (CGRect)sizeThatFits:(CGSize)size; 

CGSize size = [label sizeThatFits:CGSizeMake(label.frame.size.width, CGFLOAT_MAX)];

- (CGRect)boundingRectWithSize:(CGSize)size
            options:(NSStringDrawingOptions)options
            context:(nullable NSStringDrawingContext *)context;

NSStringDrawingOptions options = NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading;
CGRect rect = [attributeString boundingRectWithSize:CGSizeMake(label.frame.size.width, CGFLOAT_MAX) options:options context:nil];

//通过boundingWithRect 计算出未处理的rect值
 NSStringDrawingOptions options = NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading;
 CGRect rect = [attributeString boundingRectWithSize:CGSizeMake(label.frame.size.width, CGFLOAT_MAX) options:options context:nil];

//判断内容是否只有一行 : (目前高度 - 字体高度) <= 行间距
 if ((rect.size.height - _font.lineHeight) <= paragraphStyle.lineSpacing){
//如果只有一行，进行判断内容中是否全部为汉字
  if ([self containChinese:string]) {
//修正后高度为： 目前高度 - 一个行间距
   rect = CGRectMake(rect.origin.x, rect.origin.y, rect.size.width, rect.size.height-paragraphStyle.lineSpacing);
  }
 }

//判断内容中是否全部为汉字
- (BOOL)containChinese:(NSString *)str {
  for(int i=0; i< [str length];i++){ int a = [str characterAtIndex:i];
   if( a > 0x4e00 && a < 0x9fff){ 
     return YES; 
   }
  }
  return NO;
}