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我在iOS9Sampler中看到以下代码在iOS 9中使用Search API
。它使用NSUserActivity
和CSSearchableIndex
。所以,我要问的问题:Search API中的CSSearchableIndex和NSUserActivity有什么区别?多久打一次电话?
- 时应该使用
NSUserActivity
,当要使用CSSearchableIndex
?在Spotlight中搜索时,我看到它的效果相同。 - 下面的代码调用每个视图控制器的
viewDidLoad
。这是对的吗?还是应该只打一次?我怎样才能打电话一次?
NSUserActivity
let activityType = String(format: "%@.%@", uniqueIdentifier, domainIdentifier)
activity = NSUserActivity(activityType: activityType)
activity.title = "iOS-9-Sampler_NSUserActivity"
activity.keywords = Set<String>(arrayLiteral: "dog", "cat", "pig", "sheep")
activity.eligibleForSearch = true
activity.becomeCurrent()
核心焦点
let attributeSet = CSSearchableItemAttributeSet(itemContentType: kUTTypeImage as String)
attributeSet.title = "iOS-9-Sampler_CoreSpotlight"
attributeSet.contentDescription = "iOS-9-Sampler is a code example collection for new features of iOS 9."
attributeSet.keywords = ["dog", "cat", "bird", "fish"]
let image = UIImage(named: "m7")!
let data = UIImagePNGRepresentation(image)
attributeSet.thumbnailData = data
let searchableItem = CSSearchableItem(
uniqueIdentifier: uniqueIdentifier,
domainIdentifier: domainIdentifier,
attributeSet: attributeSet)
CSSearchableIndex.defaultSearchableIndex().indexSearchableItems([searchableItem]) { (error) -> Void in
if error != nil {
print("failed with error:\(error)\n")
}
else {
print("Indexed!\n")
}
}