iOS-收到消息時觸發本地通知

Question

我正在構建一個允許其用戶發送彼此消息的應用程序。 收到新消息后，它將顯示在當前用戶的“表”視圖中。 我希望我的應用在收到新消息時向當前用戶發送通知。 有人知道我該怎么做嗎？

我已經在AppDelegate中設置了通知：

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];
}

並且我知道以下代碼將允許我在指定的時間（例如，由選擇器設置）觸發通知：

 // 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];

但是，當已登錄用戶的新消息發布到服務器（並出現在表視圖中）時，如何發出通知？

Answer 1

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

如果您的系統是iOS8，則需要注冊權限。

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];
    }

您可以嘗試一下，我可以在設備上成功使用此代碼。