设置通知侦听器

本主题介绍如何为云眼特性标帜(Feature Flag)AB实验 Swift SDK 设置和删除通知侦听器。

通知侦听器触发您在 SDK 中触发某些操作时定义的回调函数。

最常见的用例是将所有特性标帜(Feature Flag)决策的流发送到分析提供商或内部数据仓库，以将其与您拥有的有关用户的其他数据联接。

通知侦听器类型

有关通知侦听器类型和用例的更多信息，请参阅通知侦听器。

有关代码示例，请参阅以下部分。

添加和删除所有通知侦听器

下面的示例代码演示如何添加侦听器、删除侦听器、删除特定类型的所有侦听器（例如所有决策侦听器）以及删除所有侦听器。

Swift

// Add a notification listener 
let notificationId = eyeofcloud.notificationCenter.addDecisionNotificationListener(decisionListener: { (type, userId, attributes, decisionInfo) in         
    // Send data to analytics provider here 
})    

// Remove a specific listener 
eyeofcloud.notificationCenter.removeNotificationListener(notificationId: notificationId!)  

// Remove all Notification Listeners 
eyeofcloud.notificationCenter.clearAllNotificationListeners()    

// Remove all Notification Listeners of a certain type 
eyeofcloud.notificationCenter.clearNotificationListeners(type: .decision)

Object—C

// Add a notification listener 
NSNumber *notificationId = [self.eyeofcloud.notificationCenter addDecisionNotificationListenerWithDecisionListener:^(NSString *type, NSString *userId, NSDictionary<NSString *,id> *attributes, NSDictionary<NSString *,id> *decisionInfo) {     
    // Send data to analytics provider here 
}];  

// Remove a specific listener 
[eyeofcloud.notificationCenter removeNotificationListenerWithNotificationId:notificationId];  

// Remove all Notification Listeners 
[eyeofcloud.notificationCenter clearAllNotificationListeners];  

// Remove all Notification Listeners of a certain type 
[eyeofcloud.notificationCenter clearNotificationListenersWithType:NotificationTypeDecision];

设置每种类型的通知侦听器

下面的示例代码演示如何设置每种类型的通知侦听器。

Swift

// SET UP DECISION NOTIFICATION LISTENER          
let onDecision : DecisionListener = {[weak self](decisionType, userId, attributes, decisionInfo) in     
    // Add a DECISION Notification Listener for type FLAG     
    if decisionType == "flag" {        
        // Access information about feature, for example, key and enabled status        
        print(decisionInfo["flagKey"])        
        print(decisionInfo["enabled"])        
        print(decisionInfo["decisionEventDispatched"])      
    } 
}
self.eyeofcloudClient?.notificationCenter?.addDecisionNotificationListener(decisionListener: onDecision)          

// SET UP LOG EVENT NOTIFICATION LISTENER          
let onLogEvent : LogEventListener = {[weak self] (url, logEvent) in     
    // process the logEvent object here (send to analytics provider, audit/inspect data) 
} 
self.eyeofcloudClient?.notificationCenter?.addLogEventNotificationListener(logEventListener: onLogEvent)          

// SET UP DATAFILE CHANGE NOTIFICATION LISTENER          
let onDatafileUpdate : DatafileChangeListener = {[weak self] (datafile) in 
} 
self.eyeofcloudClient?.notificationCenter?.addDatafileChangeNotificationListener(datafileListener: onDatafileUpdate)          
    
// SET UP TRACK LISTENER          
let onTrack : TrackListener = { [weak self](eventKey, userId, attributes, eventTags, event) in     
    // process the event here (send to analytics provider, audit/inspect data) 
} 
self.eyeofcloudClient?.notificationCenter?.addTrackNotificationListener(trackListener: onTrack)

Object-C

// SET UP ACTIVATE NOTIFICATION LISTENER      
(void)[self.eyeofcloudClient.notificationCenter addActivateNotificationListenerWithActivateListener:^(NSDictionary<NSString *,id> * _Nonnull experiment, NSString * _Nonnull userId, NSDictionary<NSString *,id> * _Nullable attributes, NSDictionary<NSString *,id> * _Nonnull variation, NSDictionary<NSString *,id> * _Nonnull event) { }];  

// SET UP DECISION NOTIFICATION LISTENER      

(void)[self.eyeofcloudClient.notificationCenter addDecisionNotificationListenerWithDecisionListener: ^(NSString * _Nonnull decisionType, NSString * _Nonnull userId, NSDictionary<NSString *,id> * _Nullable attributes, NSDictionary<NSString *,id> * _Nonnull decisionInfo) {     
    // Add a DECISION Notification Listener for type FEATURE     
    if ([decisionType isEqualToString:@"feature"]) {         
        // Access information about feature, for example, key and enabled status         
        NSLog(decisionInfo[@"featureKey"]);         
        NSLog(decisionInfo[@"featureEnabled"]);         
        NSLog(decisionInfo[@"source"]);     
    } 
}];  

// SET UP LOG EVENT NOTIFICATION LISTENER      

(void)[self.eyeofcloudClient.notificationCenter addLogEventNotificationListenerWithLogEventListener:^(NSString * _Nonnull url, NSDictionary<NSString *,id> * _Nonnull logEvent) {     
    // process the logEvent object here (send to analytics provider, audit/inspect data) 
}];  

// SET UP DATAFILE CHANGE NOTIFICATION LISTENER      

(void)[self.eyeofcloudClient.notificationCenter addDatafileChangeNotificationListenerWithDatafileListener:^(NSData * _Nonnull datafile) { 

}];       

// SET UP TRACK LISTENER      

(void)[self.eyeofcloudClient.notificationCenter addTrackNotificationListenerWithTrackListener:^(NSString * _Nonnull eventKey, NSString * _Nonnull userId, NSDictionary<NSString *,id> * _Nullable attributes, NSDictionary<NSString *,id> * _Nullable eventTags, NSDictionary<NSString *,id> * _Nonnull event) {     
    // process the event here (send to analytics provider, audit/inspect data) 
}];