首先想到的方法是在description方法中重新遍历修改, 这里推荐字符串处理Unicode编码的方式.

首先还是在字典分类中覆盖原先的description方法, 这里的unicodeString方法是下一步需要实现的NSString分类对象方法

- (NSString *)descriptionWithLocale:(id)locale {
    return self.description.unicodeString;
}

在NSString分类中实现字符串处理Unicode编码

- (NSString *)unicodeString {
//    return @"kkkllpp";
    
    NSString *tempStr1 = [self stringByReplacingOccurrencesOfString:@"\\u" withString:@"\\U"];
    
    
    
    NSString *tempStr2 = [tempStr1 stringByReplacingOccurrencesOfString:@"\"" withString:@"\\\""];
    
    NSString *tempStr3 = [[@"\"" stringByAppendingString:tempStr2] stringByAppendingString:@"\""];

    
    NSData *tempData = [tempStr3 dataUsingEncoding:NSUTF8StringEncoding];
    
    NSPropertyListFormat format = NSPropertyListOpenStepFormat;
    
    
    /* Create a property list from an NSData. The options can be any of NSPropertyListMutabilityOptions. If the format parameter is non-NULL, it will be filled out with the format that the property list was stored in. If an error occurs the return value will be nil and the error parameter (if non-NULL) set to an autoreleased NSError describing the problem.
     */
    return [NSPropertyListSerialization propertyListWithData:tempData options:NSPropertyListImmutable format:&format error:nil];
    
//    return [returnStr stringByReplacingOccurrencesOfString:@"\\r\\n" withString:@"\n"];
}

最后用到的属性列表序列化函数, 没有大神指点很难想到

参考: https://www.jianshu.com/p/040293327e18