Question

我试图在每天早上6点多次间隔时间内每隔15点发一次uilocalnotification。

我试过一个示例代码，但不知道如何在模拟器中测试它。

NSDate *now = [NSDate date];
NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *components = [calendar components:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay fromDate:now];
[components setHour:6];
[components setMinute:0];
[components setSecond:0];

// Gives us today's date but at 6am
NSDate *next6am = [calendar dateFromComponents:components];
NSLog(@"next9am BEFORE :%@",next6am);

if ([next6am timeIntervalSinceNow] < 0) {
    // If today's 6am already occurred, add 24hours to get to tomorrow's
    next6am = [next6am dateByAddingTimeInterval:60*60*24*15];
}

UILocalNotification* Localnotification = [[UILocalNotification alloc]init];

Localnotification.fireDate = next6am;
Localnotification.alertBody = @“it is been 15 days“;

Localnotification.repeatInterval = NSCalendarUnitWeekOfYear*2+NSCalendarUnitDay;
[[UIApplication sharedApplication] scheduleLocalNotification:Localnotification];

但不确定如何在模拟器中测试它并且不确定它是否会起作用将不胜感激。

由于

Answer 1

本地通知适用于模拟器。但是，如果您希望在应用程序位于前台时看到nofication，请确保在应用委托中实现应用程序：didreceiveLocalNotification：

- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification{
    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"MyAlertView" message:notification.alertBody delegate:self cancelButtonTitle:@"OK"
        otherButtonTitles:nil];
    [alertView show];
    if (alertView) {
        [alertView release];
    }
}

Answer 2

经过大量搜索互联网并尝试解决后，我才知道iOS重复间隔如下，

    NSCalendarUnitYear  // for every year              
    NSCalendarUnitMonth  // for every month          
    NSCalendarUnitDay     // for every day          
    NSCalendarUnitHour     // for every hour          
    NSCalendarUnitMinute  // for every minute
  and many more

我们只能以上述方式设置重复间隔。

但如果我们想每15天重复一次间隔，我们需要为UILocalNotification写一个自定义的重复间隔。

所以每年有12个月，预定的活动数量为24个，所以我做了2年（730天）的循环，并计划在接下来的2年内举办48个活动

以下是实现结果的代码

       UILocalNotification* Localnotification = [[UILocalNotification alloc]init];

       NSCalendar *calendar = [NSCalendar autoupdatingCurrentCalendar] ;
        NSDateComponents *components =
        [calendar components:(NSDayCalendarUnit | NSYearCalendarUnit | NSMonthCalendarUnit ) fromDate:[NSDate date]];

        [components setHour:6];
        [components setMinute:0];
        [components setSecond:0];
        // Gives us today's date
        NSDate *next6am = [calendar dateFromComponents:components];

        /*
         * Since every year has 365 days and
         */
        for (int i = 0; i<48; i++)//
        {
            next6am = [next6am dateByAddingTimeInterval:60*60*24*15];


            Localnotification.fireDate = next6am;

            //////add the userinfo for uilocal notification only after fire date. if called before the user info will not be updated.

            NSDictionary *infoDict = [NSDictionary dictionaryWithObject:[NSString stringWithFormat:@"15DaysAlerts"] forKey:@"notify"];
            Localnotification.userInfo = infoDict;

            if (CHECK_IOS_VERSION>8.2)
            {
                Localnotification.alertTitle = @"eKinCare";
            }
            Localnotification.alertBody = @"Any new medical reports to save?Touch to securely save & access anywhere, anytime.";
            // Set a repeat interval to monthly
            Localnotification.repeatInterval = NSCalendarUnitYear;
            [[UIApplication sharedApplication] scheduleLocalNotification: Localnotification];
            NSLog(@"next9am:%@",next6am);
        }

您可以使用以下方法查看所有已安排的活动

-(void)showScheduledNotifications
{
    UIApplication *app = [UIApplication sharedApplication];
    NSArray *eventArray = [app scheduledLocalNotifications];
    NSLog(@"Events array : %@",eventArray);
    int scheduled_15daysAlerts = 0;

    for (int i=0; i<[eventArray count]; i++)
    {
        UILocalNotification* oneEvent = [eventArray objectAtIndex:i];
        NSDictionary *userInfoCurrent = oneEvent.userInfo;
        NSString *uid=[NSString stringWithFormat:@"%@",[userInfoCurrent valueForKey:@"notify"]];
        if ([uid isEqualToString:@"15DaysAlerts"])
        {
            scheduled_15daysAlerts++;
            NSLog(@"yes found");
            //Cancelling local notification
        }
    }

    NSLog(@"Scheduled 15 days alert = [%d]",scheduled_15daysAlerts);
}

希望这可以帮助正在寻找解决方案的人：）

Answer 3

在iOS 10中，您可以使用UNTimeIntervalNotificationTrigger每15天安排一次通知并重复（设置repeats: YES）。

UNTimeIntervalNotificationTrigger* trigger = [UNTimeIntervalNotificationTrigger triggerWithTimeInterval:(15*24*3600) repeats: YES];
NSLog(@"td %@", trigger.nextTriggerDate);

UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier:identifier content:content trigger:trigger];

[center addNotificationRequest:request withCompletionHandler:^(NSError * _Nullable error) {
    if (error != nil) {
        NSLog(@"Something went wrong: %@",error);
    } else {
        NSLog(@"Created! --> %@",request);
    }
}];

希望这可以帮助任何寻找此话题的人。

如何在objc中以重复间隔每15天触发一次UILocalNotification

3 个答案: