的定义是“在OneSignal中订阅”

Question

在OneSignal iOS SDK中，有属性subscribed。影响userSubscriptionSetting的值的第三个因素subscribed到底是什么？

// Subscription Classes
@interface OSSubscriptionState : NSObject

@property (readonly, nonatomic) BOOL subscribed; // (yes only if userId, pushToken, and setSubscription exists / are true)
@property (readonly, nonatomic) BOOL userSubscriptionSetting; // returns setSubscription state.
@property (readonly, nonatomic) NSString* userId;    // AKA OneSignal PlayerId
@property (readonly, nonatomic) NSString* pushToken; // AKA Apple Device Token
- (NSDictionary*)toDictionary;

@end