如何删除特定的NSUserActivity搜索索引? [英] How to delete a specific NSUserActivity search index?

问题描述

我使用 NSUserActivity 为要搜索的用户活动编制索引.我找到了一种删除特定 NSUserActivity 的解决方案，将具有 relatedUniqueIdentifier 的 CSSearchableItemAttributeSet 分配给 NSUserActivity 的方法:

I use NSUserActivity to index a user activity for searching. I found a solution to delete a specific NSUserActivity, assign a CSSearchableItemAttributeSet with relatedUniqueIdentifier to NSUserActivity:

let attributeSet = CSSearchableItemAttributeSet(itemContentType: kUTTypeContact as String)
attributeSet.relatedUniqueIdentifier = objectId

let activity = NSUserActivity(activityType: Employee.domainIdentifier)
activity.title = name
activity.userInfo = userActivityUserInfo
activity.keywords = [email, department]
activity.contentAttributeSet = attributeSet

并使用

[[CSSearchableIndex defaultSearchableIndex] 
deleteSearchableItemsWithIdentifiers: objectId completionHandler:^(NSError *deletionError) {  
        if (deletionError) {  
            NSLog(@"Could not delete items from the search index with error %@", deletionError);  
        }  
    }]; 

我不知道这是否是正确的解决方案.您是否有更好的解决方案来删除特定的 NSUserActivity 搜索索引?

I don't know if it is a right solution or not. Do you have a better solution to delete a specific NSUserActivity search index?

推荐答案

从iOS 12开始，有两种方法可以删除 NSUserActivity

As of iOS 12, there are 2 methods to delete NSUserActivity

class func deleteAllSavedUserActivities(completionHandler: () -> Void)

class func deleteSavedUserActivities(withPersistentIdentifiers: [NSUserActivityPersistentIdentifier], completionHandler: () -> Void)

文档注释删除所有由Core Spotlight存储或捐赠为Siri快捷方式的用户活动."

The docs note "Deletes all user activities stored by Core Spotlight or donated as Siri shortcuts."

https://developer.apple.com/documentation/foundation/nsuseractivity

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