iOS UILocalNotification设置为每天一次,每两天一次,仅在星期日

我试图使用设置包来安排UIlocalnotification.在设置中,您可以选择是否要每天通知(每天1天),每2天1次,仅限星期日或从不.

这是我使用的代码(这一切都在AppDelegate.m中)：

-(void)defaultsChanged:(NSNotification *)notification {

         [[UIApplication sharedApplication] cancelAlllocalnotifications];

        [[NSUserDefaults standardUserDefaults]synchronize];
        Nsstring *testValue = [[NSUserDefaults standardUserDefaults] stringForKey:@"multi_preference"];

        NSLog(@"%@",testValue);

        NSDate *today = [NSDate date];

        NSCalendar* calendar = [NSCalendar currentCalendar];
        NSDateComponents* compoNents = [calendar components:NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit fromDate:today]; // Get necessary date components

        [compoNents month];[compoNents day];

        NSDictionary *dictToday= [self getDataFromdate : [compoNents day] month:[compoNents month]];


        if ([testValue isEqualToString:@"one"]){
            UIlocalnotification* localnotification = [[UIlocalnotification alloc] init];
            localnotification.fireDate = [[NSDate date]dateByAddingTimeInterval:20];
            localnotification.alertAction = @"View";
            localnotification.alertBody = [dictToday objectForKey:@"saint_description"];
            localnotification.repeatInterval = NSDayCalendarUnit;
            localnotification.timeZone = [NSTimeZone defaultTimeZone];
            localnotification.applicationIconBadgeNumber = [[UIApplication sharedApplication] applicationIconBadgeNumber] + 1;

            [[UIApplication sharedApplication] schedulelocalnotification:localnotification];
             [[NSNotificationCenter defaultCenter] postNotificationName:@"reloadData" object:self];

             }
        if (testValue==Nil){
            UIlocalnotification* localnotification = [[UIlocalnotification alloc] init];
            localnotification.fireDate = [[NSDate date]dateByAddingTimeInterval:20];
            localnotification.alertAction = @"View";
            localnotification.alertBody = [dictToday objectForKey:@"saint_description"];
            localnotification.repeatInterval = NSDayCalendarUnit;
            localnotification.timeZone = [NSTimeZone defaultTimeZone];
            localnotification.applicationIconBadgeNumber = [[UIApplication sharedApplication] applicationIconBadgeNumber] + 1;

            [[UIApplication sharedApplication] schedulelocalnotification:localnotification];
            [[NSNotificationCenter defaultCenter] postNotificationName:@"reloadData" object:self];

        }
        if ([testValue isEqualToString:@"two"]){

            UIlocalnotification* localnotification = [[UIlocalnotification alloc] init];
            localnotification.fireDate = [[NSDate date]dateByAddingTimeInterval:86401];
            localnotification.alertAction = @"View";
            localnotification.alertBody = [dictToday objectForKey:@"saint_description"];
            localnotification.repeatInterval = NSDayCalendarUnit;
            localnotification.timeZone = [NSTimeZone defaultTimeZone];
            localnotification.applicationIconBadgeNumber = [[UIApplication sharedApplication] applicationIconBadgeNumber] + 1;

            [[UIApplication sharedApplication] schedulelocalnotification:localnotification];
             [[NSNotificationCenter defaultCenter] postNotificationName:@"reloadData" object:self];

        }

        if ([testValue isEqualToString:@"three"]){
        NSDate *today2 = [[NSDate alloc] init];
        NSCalendar *gregorian = [[NSCalendar alloc]
                                 initWithCalendarIdentifier:NSGregorianCalendar];

        // Get the weekday component of the current date
        NSDateComponents *weekdayComponents = [gregorian components:NSWeekdayCalendarUnit
                                                           fromDate:today2];

        /*
         Create a date components to represent the number of days to subtract from the current date.
         The weekday value for Sunday in the Gregorian calendar is 1,so subtract 1 from the number of days to subtract from the date in question.  (If today is Sunday,subtract 0 days.)
         */
        NSDateComponents *componentsToSubtract = [[NSDateComponents alloc] init];
        [componentsToSubtract setDay: 0 - ([weekdayComponents weekday] - 1)];

        NSDate *beginningOfWeek = [gregorian dateByAddingComponents:componentsToSubtract
                                                             toDate:today2 options:0];

        /*
         Optional step:
         beginningOfWeek Now has the same hour,minute,and second as the original date (today).
         To normalize to midnight,extract the year,month,and day components and create a new date from those components.
         */
        NSDateComponents *components =
        [gregorian components:(NSYearCalendarUnit | NSMonthCalendarUnit |
                               NSDayCalendarUnit) fromDate: beginningOfWeek];
        beginningOfWeek = [gregorian dateFromComponents:components];



            UIlocalnotification* localnotification = [[UIlocalnotification alloc] init];
            localnotification.fireDate = beginningOfWeek;
            localnotification.alertAction = @"View";
            localnotification.alertBody = [dictToday objectForKey:@"saint_description"];
            localnotification.repeatInterval = NSWeekdayCalendarUnit;
            localnotification.timeZone = [NSTimeZone defaultTimeZone];
            localnotification.applicationIconBadgeNumber = [[UIApplication sharedApplication] applicationIconBadgeNumber] + 1;

            [[UIApplication sharedApplication] schedulelocalnotification:localnotification];
            [[NSNotificationCenter defaultCenter] postNotificationName:@"reloadData" object:self];

        }
    }

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

    [[NSNotificationCenter defaultCenter] addobserver:self
                                             selector:@selector(defaultsChanged:)
                                                 name:NSUserDefaultsDidChangeNotification
                                               object:nil];

    UIlocalnotification *locationNotification = [launchOptions objectForKey:UIApplicationLaunchOptionslocalnotificationKey];
    if (locationNotification) {
        // Set icon badge number to zero
        application.applicationIconBadgeNumber = 0;
    }
return yes;
}
- (void)application:(UIApplication *)application didReceivelocalnotification:(UIlocalnotification *)notification
{




    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Today's Saint"
                                                    message:notification.alertBody
                                                   delegate:self cancelButtonTitle:@"OK"
                                          otherButtonTitles:nil];
    if (notification.alertBody!=Nil)
    [alert show];


     [[NSNotificationCenter defaultCenter] postNotificationName:@"reloadData" object:self];

    // Set icon badge number to zero
    application.applicationIconBadgeNumber = 0;
}

代码是否正确启动了我所说的通知？
如果没有,那有什么问题呢？谢谢！

解决方法

您似乎在用户更改首选项时调度通知.但是,您永远不会取消调度以前安排的通知,这就是为什么您会在一段时间内观察突发的通知,这些通知的时间将完全对应于您每天或两天前反复更改设置的时间.

您计划的通知是与您要修改的通知集不同的对象.不幸的是,UIlocalnotifications没有标识符令牌.

但是,您可以在收到带有[[UIApplication sharedApplication] cancelAlllocalnotifications]的defaultsChanged：消息时取消调度所有以前的通知;在你重新安排之前.这将解决您的问题.

还要仔细查看this solution,建议即使在启动时也可以取消并重新安排通知,以避免在用户重新安装应用程序时发生突发或重复通知.

原文地址：https://www.jb51.cc/iOS/335916.html