Question

我的Cloudkit记录包含＆＃39; Keywords＆＃39;字段＆＃39; text＆＃39;

我可以使用此模式仅获取所有记录的关键字字段

let predicate = NSPredicate(value: true)
let query = CKQuery(recordType: "Library", predicate: predicate)
var operation = CKQueryOperation(query: query)  
operation.desiredKeys = ["KeyWords"]
operation.recordFetchedBlock = { [weak self] (record:CKRecord!) in
  ...
}
operation.queryCompletionBlock = { [weak self] (cursor:CKQueryCursor!, error:NSError!) in
  ...
}
self.publicDatabase!.addOperation(operation)

我想将返回的记录限制为KeyWords字段与搜索字符串匹配的记录，我认为这意味着提供合适的谓词。

documentation表示CONTAINS仅适用于列表，除非您使用搜索所有文本字段的self关键字

但是，用以下语句替换谓词声明：

let predicate = NSPredicate(format: "SELF CONTAINS[c] %@", searchString)

结果

*** Terminating app due to uncaught exception 'CKException', reason: 'Predicate comparison options are not supported for expression: SELF CONTAINS[c]

并使用

let predicate = NSPredicate(format: "SELF CONTAINS %@", searchString)

结果

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

我确信这是直截了当的，但文档还不完整

Answer 1

您可以将此谓词用于令牌搜索：

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

如何在Cloudkit记录上执行文本搜索？

1 个答案: