本文介绍了NSPredicate 相当于 SQL 的 LIKE的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在寻找一种使用 NSPredicate
设置 LIKE
条件来获取对象的方法.除此之外,OR
也很有用.我正在尝试做一些事情,如果用户搜索James",我可以编写一个 NSPredicate
来执行以下操作:
I'm looking for a way to use NSPredicate
to set a LIKE
condition to fetch objects. In addition to that, an OR
would be useful as well. I'm trying to do something where if a user searches "James" I can write an NSPredicate
that will do the equivalent of:
select * from users where firstname LIKE '%James%' OR lastname LIKE '%James%';
推荐答案
NSString *_mySearchKey = @"James";
NSPredicate *_myPredicate = [NSPredicate predicateWithFormat:@"(firstname CONTAINS[cd] %@) OR (lastname CONTAINS[cd] %@)", _mySearchKey, _mySearchKey];
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