如何删除特定的NSUserActivity搜索索引？

Question

我使用NSUserActivity来索引用户活动以进行搜索。我找到了一个删除特定NSUserActivity的解决方案，将一个带有relatedUniqueIdentifier的CSSearchableItemAttributeSet分配给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

并将其删除

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

我不知道这是不是一个正确的解决方案。您是否有更好的解决方案来删除特定的NSUserActivity搜索索引？

Answer 1

从iOS 12开始，有两种方法可以删除NSUserActivity

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

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

文档指出：“删除Core Spotlight存储的或作为Siri快捷方式捐赠的所有用户活动。”

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