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iOS 8提供了一个令人兴奋的新API来创建交互式通知(interactive notifications),它能让你在你的应用之外为用户提供额外的功能。我发现网上还没有关于如何实现它的比较好的示例教程,所以我将在这篇文章里来实现一个简单的交互式通知示例,分享给大家。
为了创建交互式通知,需要iOS 8提供的3个新类:UIUserNotificationSettings, UIUserNotificationCategory, UIUserNotificationAction 以及它们的变体。
和以前简单地注册通知类型(sounds、banners、alerts)相比,现在你可以注册自定义的通知类别(categories)和动作(actions)。类别描述了应用自定义的通知类型,并且包含用户能够执行的响应动作。比如,你收到一个通知说某人在社交网上了关注了你,作为回应你可能会想要关注他或者忽略。
这里是一个非常简单的使用Objective-C编写的示例,演示如何注册一个包含两个动作的通知。
NSString * const NotificationCategoryIdent = @"ACTIONABLE"; NSString * const NotificationActionOneIdent = @"ACTION_ONE"; NSString * const NotificationActionTwoIdent = @"ACTION_TWO"; - (void)registerForNotification { UIMutableUserNotificationAction *action1; action1 = [[UIMutableUserNotificationAction alloc] init]; [action1 setActivationMode:UIUserNotificationActivationModeBackground]; [action1 setTitle:@"Action 1"]; [action1 setIdentifier:NotificationActionOneIdent]; [action1 setDestructive:NO]; [action1 setAuthenticationRequired:NO]; UIMutableUserNotificationAction *action2; action2 = [[UIMutableUserNotificationAction alloc] init]; [action2 setActivationMode:UIUserNotificationActivationModeBackground]; [action2 setTitle:@"Action 2"]; [action2 setIdentifier:NotificationActionTwoIdent]; [action2 setDestructive:NO]; [action2 setAuthenticationRequired:NO]; UIMutableUserNotificationCategory *actionCategory; actionCategory = [[UIMutableUserNotificationCategory alloc] init]; [actionCategory setIdentifier:NotificationCategoryIdent]; [actionCategory setActions:@[action1, action2] forContext:UIUserNotificationActionContextDefault]; NSSet *categories = [NSSet setWithObject:actionCategory]; UIUserNotificationType types = (UIUserNotificationTypeAlert| UIUserNotificationTypeSound| UIUserNotificationTypeBadge); UIUserNotificationSettings *settings; settings = [UIUserNotificationSettings settingsForTypes:types categories:categories]; [[UIApplication sharedApplication] registerUserNotificationSettings:settings]; }
要发送这个通知类型,只需简单的将category添加到声明里。
"aps" : { "alert" : "Pull down to interact.", "category" : "ACTIONABLE" }
现在为了响应用户选择的操作,你需要在UIApplicationDelegate协议添加两个新方法:
application:handleActionWithIdentifier:forLocalNotification:completionHandler:
application:handleActionWithIdentifier:forRemoteNotification:completionHandler:
用户从你的推送通知中选择一个动作后,该方法将会在后台被调用。
- (void)application:(UIApplication *)application handleActionWithIdentifier:(NSString *)identifier forRemoteNotification:(NSDictionary *)userInfo completionHandler:(void (^)())completionHandler { if ([identifier isEqualToString:NotificationActionOneIdent]) { NSLog(@"You chose action 1."); } else if ([identifier isEqualToString:NotificationActionTwoIdent]) { NSLog(@"You chose action 2."); } if (completionHandler) { completionHandler(); } }
如文档所述,通过标示符来判定是哪个动作被选中,最后调用completionHandler,即可大功告成。这里仅仅简单的演示了一下iOS 8 新通知API表面上的功能,今后我将更深入的研究一下,有机会再和大家分享。
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原文地址:http://www.cnblogs.com/fengmin/p/5438121.html