CloudKit NSPredicate的意外表达

问题描述

我正在使用CloudKit并希望根据字符串字段搜索记录。

I'm using CloudKit and wish to perform a search for records based on their string fields.

Apple文档说这是对记录字段进行标记化搜索的方法：

Apple docs say this is the way to do a tokenized search of a record's fields:

清单5 ：匹配包含标记化字符串的字段

Listing 5: Matching a field containing a tokenized string

NSPredicate predicate = nil;
predicate = [NSPredicate predicateWithFormat:@"self contains 'bob smith'"];

当我为谓词输入这个确切的字符串时，我得到了例外。

When I enter this exact string for the predicate, I get the an exception.

代码：

predicate = [NSPredicate predicateWithFormat:@"self contains 'bob smith'"];
query = [[CKQuery alloc] initWithRecordType:kCKRecord_Level predicate:predicate];

例外：

*** Terminating app due to uncaught exception 'CKException', reason: 'Unexpected expression: SELF CONTAINS "bob smith"'

---

任何想法可能出错？有没有人使用该谓词字符串和CloudKit取得任何成功？

---

Any ideas what could be wrong? Has anyone had any success with that predicate string and CloudKit?

推荐答案

看起来自包含不再起作用了。您仍然使用此谓词进行标记化搜索：

It looks like the 'self contains' does not work anymore. You still do a tokenized search using this predicate:

NSPredicate(format: "allTokens TOKENMATCHES[cdl] %@", "bob smith")

这篇关于CloudKit NSPredicate的意外表达的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！