ios - 使用 NSUserActivity 使应用事件和状态可搜索

Question

以下是我试图实现的代码，使应用程序事件和状态可搜索但无法在 iOS 搜索中显示

NSUserActivity *userActivity = [[NSUserActivity alloc]initWithActivityType:@"com.mycompany.activity-type"];

userActivity.title = @"Hello world from in app search";
userActivity.keywords = [NSSet setWithArray:@[@"Hello",@"Welcome", @"search"]];
userActivity.userInfo = @{@"id":@"com.example.state"};

userActivity.eligibleForSearch = YES;    
[userActivity becomeCurrent];

Link让我的问题更清楚。

Answer 1

来自 Apple 论坛:

One thing that has bitten a few people (myself included) is that the activity must not be deallocated. If your code is only working with NSUserActivities (i.e. not using CoreSpotlight in addition) then make sure your activities aren't being deallocated immediately.
In my case, I had code that was allocating the NSUA, setting some properties on it, calling becomeCurrent, but then the object would go out of scope and deallocated. If you're doing this, try tossing the activity into a strong property to see if you can then see the results when you search.

https://forums.developer.apple.com/message/13640#13640