Question

我正在构建一个应用程序，允许其用户发送彼此的消息。收到新消息时，它将显示在当前用户的“表”视图中。我希望我的应用在新消息到达时向当前用户发送通知。有谁知道我怎么可能这样做？

我已经在我的AppDelegate中设置了通知：

appdelegate.m

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    // Let the device know we want to receive push notifications
    [[UIApplication sharedApplication] registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge) categories:nil]];
    [[UIApplication sharedApplication] registerForRemoteNotifications];
}

我知道以下代码将允许我在指定时间触发通知（例如，由选择器设置）：

 // Get the current date
    NSDate *pickerDate = [self.datePicker date];

    // Schedule the notification
    UILocalNotification* localNotification = [[UILocalNotification alloc] init];
    localNotification.fireDate = pickerDate;
    localNotification.alertBody = self.itemText.text;
    localNotification.alertAction = @"You are being notified!";
    localNotification.timeZone = [NSTimeZone defaultTimeZone];
    localNotification.applicationIconBadgeNumber = [[UIApplication sharedApplication] applicationIconBadgeNumber] + 1;

    [[UIApplication sharedApplication] scheduleLocalNotification:localNotification];

    // Request to reload table view data
    [[NSNotificationCenter defaultCenter] postNotificationName:@"reloadData" object:self];

    // Dismiss the view controller
    [self dismissViewControllerAnimated:YES completion:nil];

如果将新邮件发布到服务器（并显示在桌面视图中）以供登录用户使用，我该如何发出通知？

Answer 1

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
       UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeBadge|UIUserNotificationTypeSound|UIUserNotificationTypeAlert) categories:nil];
    [[UIApplication sharedApplication] registerUserNotificationSettings:settings];}

如果您的系统是iOS8，则需要注册权限。

UILocalNotification * notification = [[UILocalNotification alloc] init];
    NSDate * pushDate = [NSDate dateWithTimeIntervalSinceNow:Time];
    if (notification!=nil) {


        notification.fireDate= pushDate;

        notification.timeZone = [NSTimeZone defaultTimeZone];

        notification.repeatInterval = kCFCalendarUnitDay;

        notification.soundName = UILocalNotificationDefaultSoundName;

        notification.alertBody = @"Time O.K!";
        NSLog(@"Ready");

        notification.applicationIconBadgeNumber = 1;
        //notification.applicationIconBadgeNumber = [[[UIApplication sharedApplication] scheduledLocalNotifications] count]+1;

        NSDictionary * inforDic = [NSDictionary dictionaryWithObject:@"name" forKey:@"key"];
        notification.userInfo =inforDic;

        [[UIApplication sharedApplication] scheduleLocalNotification:notification];
    }

您可以尝试一下，我可以在我的设备上成功使用此代码。

iOS - 收到消息时触发本地通知

1 个答案: