【Swift】SpotLight搜索

SpotLight主要功能是在iOS9系统界面下拉会出现搜索功能界面，在这里可以搜索关键信息，来展示应用内的内容，并且点击信息打开应用跳转具体页面等操作。这个功能还是很有用的，面对这越来越多的应用霸占你手机，给你的应用加上这么一个搜搜功能，还是有点与众不同，主要是提升逼格。

import CoreSpotlight
import MobileCoreServices

func indexItem(title: String, desc: String, identifier: String) {
        let attributeSet = CSSearchableItemAttributeSet(itemContentType: kUTTypeText as String)
        attributeSet.title = title
        attributeSet.contentDescription = desc
        attributeSet.keywords = ["abc","cd","efg"]
        let item = CSSearchableItem(uniqueIdentifier: "\(identifier)", domainIdentifier: "Lingye.OopsVoice", attributeSet: attributeSet)
        CSSearchableIndex.default().indexSearchableItems([item]) { error in
            if let error = error {
                print("Indexing error: \(error.localizedDescription)")
            } else {
                print("Search item successfully indexed!")
            }
        }
    }

    func deindexItem(identifier: String) {
        CSSearchableIndex.default().deleteSearchableItems(withIdentifiers: ["\(identifier)"]) { error in
            if let error = error {
                print("Deindexing error: \(error.localizedDescription)")
            } else {
                print("Search item successfully removed!")
            }
        }
    }

func application(_ application: UIApplication, continue userActivity: NSUserActivity, restorationHandler: @escaping ([UIUserActivityRestoring]?) -> Void) -> Bool {
        if userActivity.activityType == CSSearchableItemActionType {
            if let uniqueIdentifier = userActivity.userInfo?[CSSearchableItemActivityIdentifier] as? String {
                deindexItem(identifier: uniqueIdentifier)
            }
        }

        return true
    }