Objective-C中的iOS 10富媒体推送通知(媒体附件)
在iOS开发中,推送通知是一种重要的功能,能够向用户发送重要的信息和提醒。而iOS 10引入了富媒体推送通知的概念,允许开发者在通知中添加图片、音频和视频等媒体附件,提供更丰富的用户体验。本文将介绍如何在Objective-C中实现iOS 10富媒体推送通知,并附上相关的案例代码。创建富媒体推送通知在iOS 10之前,我们可以使用`UILocalNotification`和`UIRemoteNotification`来创建推送通知。而在iOS 10及以上版本,我们需要使用`UNUserNotificationCenter`来创建和管理通知。首先,我们需要在应用程序的`AppDelegate`类中进行一些配置。objective-c#import以上代码中,我们首先导入`UserNotifications`框架,并在`didFinishLaunchingWithOptions`方法中获取`UNUserNotificationCenter`的实例。然后,我们设置`center.delegate`为`self`,以便处理通知的回调。接下来,我们调用`requestAuthorizationWithOptions`方法请求用户授权,其中我们选择了`UNAuthorizationOptionAlert`和`UNAuthorizationOptionSound`选项,表示用户可以接收到通知的弹窗和声音。最后,我们使用`registerForRemoteNotifications`方法向APNs注册设备的推送通知。接下来,我们需要在`AppDelegate`类中实现`UNUserNotificationCenterDelegate`协议的方法,以便处理通知的回调。在这些回调方法中,我们可以获取到通知的内容、媒体附件等信息,并根据需要进行处理。- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter]; center.delegate = self; [center requestAuthorizationWithOptions:(UNAuthorizationOptionAlert + UNAuthorizationOptionSound) completionHandler:^(BOOL granted, NSError * _Nullable error) { if (!error) { NSLog(@"request authorization succeeded!"); } }]; [application registerForRemoteNotifications]; return YES;}- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken { // 将设备的token发送给服务器}
objective-c- (void)userNotificationCenter:(UNUserNotificationCenter *)center willPresentNotification:(UNNotification *)notification withCompletionHandler:(void (^)(UNNotificationPresentationOptions options))completionHandler { // 当应用程序处于前台时,收到通知时会调用该方法 // 在这里可以设置通知的展示方式,例如弹窗、声音等 completionHandler(UNNotificationPresentationOptionAlert);}- (void)userNotificationCenter:(UNUserNotificationCenter *)center didReceiveNotificationResponse:(UNNotificationResponse *)response withCompletionHandler:(void (^)(void))completionHandler { // 当用户点击通知时会调用该方法 // 在这里可以处理用户的点击操作,例如打开特定的界面 completionHandler();}以上代码中,我们分别实现了`willPresentNotification`和`didReceiveNotificationResponse`方法。在`willPresentNotification`方法中,我们可以设置通知的展示方式,例如弹窗、声音等。在`didReceiveNotificationResponse`方法中,我们可以处理用户的点击操作,例如打开特定的界面。添加富媒体附件在iOS 10中,我们可以使用`UNNotificationAttachment`类来添加富媒体附件。我们可以在通知的`userInfo`中添加媒体附件的URL,并在通知展示之前下载和添加附件。下面是一个添加图片附件的例子:
objective-c- (void)userNotificationCenter:(UNUserNotificationCenter *)center willPresentNotification:(UNNotification *)notification withCompletionHandler:(void (^)(UNNotificationPresentationOptions options))completionHandler { UNNotificationAttachment *attachment = notification.request.content.userInfo[@"attachment"]; if (attachment) { [[UNUserNotificationCenter currentNotificationCenter] getDeliveredNotificationsWithCompletionHandler:^(NSArray以上代码中,我们在`willPresentNotification`方法中判断通知的`userInfo`中是否存在附件URL。如果存在,我们首先检查该通知是否已经展示过,如果已经展示过,则直接调用`completionHandler(UNNotificationPresentationOptionAlert)`返回。否则,我们调用`downloadAttachment`方法下载附件,并在下载完成后添加附件到通知中。最后,我们调用`completionHandler(UNNotificationPresentationOptionAlert)`返回,表示展示通知。在本文中,我们介绍了在Objective-C中实现iOS 10富媒体推送通知的方法,并提供了相关的案例代码。通过使用`UNUserNotificationCenter`和`UNNotificationAttachment`,我们可以在推送通知中添加图片、音频和视频等媒体附件,提供更丰富的用户体验。希望本文对你理解和使用iOS 10富媒体推送通知有所帮助。* _Nonnull notifications) { for (UNNotification *deliveredNotification in notifications) { if ([deliveredNotification.request.identifier isEqualToString:notification.request.identifier]) { completionHandler(UNNotificationPresentationOptionAlert); return; } } [self downloadAttachment:attachment completion:^(NSURL *fileURL) { if (fileURL) { UNNotificationAttachment *attachment = [UNNotificationAttachment attachmentWithIdentifier:@"" URL:fileURL options:nil error:nil]; if (attachment) { UNMutableNotificationContent *content = [notification.request.content mutableCopy]; content.attachments = @[attachment]; UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier:notification.request.identifier content:content trigger:notification.request.trigger]; [[UNUserNotificationCenter currentNotificationCenter] addNotificationRequest:request withCompletionHandler:nil]; } } completionHandler(UNNotificationPresentationOptionAlert); }]; }]; } else { completionHandler(UNNotificationPresentationOptionAlert); }}- (void)downloadAttachment:(UNNotificationAttachment *)attachment completion:(void (^)(NSURL *fileURL))completion { NSURLSession *session = [NSURLSession sharedSession]; NSURLSessionDownloadTask *task = [session downloadTaskWithURL:attachment.URL completionHandler:^(NSURL *location, NSURLResponse *response, NSError *error) { if (!error) { NSURL *documentsDirectory = [[NSFileManager defaultManager] URLForDirectory:NSDocumentDirectory inDomain:NSUserDomainMask appropriateForURL:nil create:NO error:nil]; NSURL *destinationURL = [documentsDirectory URLByAppendingPathComponent:attachment.identifier]; NSError *moveError; [[NSFileManager defaultManager] moveItemAtURL:location toURL:destinationURL error:&moveError]; if (!moveError) { completion(destinationURL); } else { completion(nil); } } else { completion(nil); } }]; [task resume];}