格式化 NSPredicate：匹配“ANY”匹配两个条件
**我对如何格式化 NSPredicate 有点不知所措，其中某种关系的“任何”匹配多个条件。
举例来说，假设我正在对“雇主”实体执行提取请求，并且我希望获取至少拥有一名 18 岁以下雇员的所有雇主。因此，我可以使用 "ANYEmployees.age < 18" - 足够简单。但假设我想要匹配任何 18 岁以下且姓氏为“Howser”的员工。也就是说，雇主仅匹配“任何 18 岁以下的雇员”和“任何名为‘Howser’的雇员”是不够的，他们必须至少有一名雇员符合这两个条件。
该谓词的格式如何？
**I'm a bit at a loss about how to format an NSPredicate where "any" of a certain relationship matches more than one condition.
So for example, say I'm doing a fetch request for an "Employer" entity and I want to get all employers that have at least one employee under age 18. So, I can use "ANY employees.age < 18" - simple enough. But say I want to match any that have an employee under 18 who also has the last name "Howser." That is, it's not enough for the employer to match both "any employee under 18" and "any employee named 'Howser'" - they have to have at least one employee that matches both conditions.
How would this predicate be formatted?
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这是需要
SUBQUERY的极少数情况之一：This is one of the rare circumstances where you need
SUBQUERY: