我正在开发一个提醒到期日期的应用程序。我已经使用UILocalNotificationrepeat Interval实现了相同的功能(NSMonthCalendarUnit, NSDayCalendarUnit,NSDayCalendarUnit)。例如，我的开火日期是 01-01-2012，重复间隔是NSDayCalendarUnit，结束日期是 2012 年cancelLocalNotification:12 月 12 日，是否可以到期。
这是代码：-
- (void) scheduleNotificationOn:(NSDate*) fireDate
text:(NSString*) alertText
action:(NSString*) alertAction
sound:(NSString*) soundfileName
launchImage:(NSString*) launchImage
andInfo:(NSDictionary*) userInfo
{
userInfo = [NSDictionary dictionaryWithObjectsAndKeys:
txtExpiryDate.text, @"ExpiryDate",
txtRegNo.text , @"RegNo",
nil];
UILocalNotification *localNotification = [[UILocalNotification alloc] init];
localNotification.fireDate = fireDate;
localNotification.timeZone = [NSTimeZone systemTimeZone];
localNotification.userInfo = userInfo;
localNotification.alertBody = alertText;
localNotification.alertAction = alertAction;
NSLog(@"Repeat Type:%@",txtRepeat.text);
if([txtRepeat.text isEqualToString:@"Every Week"])
{
NSLog(@"Every Week");
localNotification.repeatInterval = 256;
}
else if([txtRepeat.text isEqualToString:@"Every Month"])
{
NSLog(@"Every Month");
localNotification.repeatInterval = NSMonthCalendarUnit;
}
else if([txtRepeat.text isEqualToString:@"Every Day"])
{
NSLog(@"Every Day");
localNotification.repeatInterval = NSDayCalendarUnit;
}
if(soundfileName == nil)
{
localNotification.soundName = UILocalNotificationDefaultSoundName;
}
else
{
localNotification.soundName = soundfileName;
}
NSLog(@"appDelegate.BadgeNumber:%d",appDelegate.BadgeNumber);
localNotification.alertLaunchImage = launchImage;
appDelegate.BadgeNumber = appDelegate.BadgeNumber + 1;
localNotification.applicationIconBadgeNumber = appDelegate.BadgeNumber;
[[UIApplication sharedApplication] scheduleLocalNotification:localNotification];
[localNotification release];
}
我通过将当前日期与到期日期进行比较来工作。但这仅在应用程序处于前台并且我不能取消通知而不是特定日期的后台时才有效。请找到以下相同的代码：-
- (void)applicationDidBecomeActive:(UIApplication *)application
{
/*
Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
*/
BadgeNumber = 0;
application.applicationIconBadgeNumber = BadgeNumber;
NSArray *localNotifications = [[UIApplication sharedApplication] scheduledLocalNotifications];
[[UIApplication sharedApplication] cancelAllLocalNotifications];
NSDateFormatter *formatter =[[[NSDateFormatter alloc]init] autorelease];
[formatter setDateFormat:@"dd/MM/yyyy"];
NSLog(@"localNotifications Count %d",localNotifications.count);
for (UILocalNotification *notify in localNotifications)
{
//notify.applicationIconBadgeNumber = 0;
NSString *ExpiryDateString = [notify.userInfo objectForKey:@"ExpiryDate"];
NSDate *ExpiryDate = [formatter dateFromString:ExpiryDateString];
NSDate * NextFireDate = nil;
NSLog(@"Expiry Date:%@",ExpiryDateString);
if(notify.repeatInterval == NSDayCalendarUnit)
{
NSLog(@"Repeat Every Day");
NextFireDate = [[NSDate date] dateByAddingDays:1];
NSLog(@"Next FireDate: %@",[formatter stringFromDate:NextFireDate]);
}
if(notify.repeatInterval == NSWeekCalendarUnit)
{
NSLog(@"Repeat Every Day");
NextFireDate = [[NSDate date] addTimeInterval:D_WEEK];
NSLog(@"Next FireDate: %@",[formatter stringFromDate:NextFireDate]);
}
if(notify.repeatInterval == NSMonthCalendarUnit)
{
NSLog(@"Repeat Every Day");
//NextFireDate = [[NSDate date] addTimeInterval:D_Month];
NextFireDate = [self CalculateExipiryDateForMonth];
NSLog(@"Next FireDate: %@",[formatter stringFromDate:NextFireDate]);
}
NSComparisonResult result = [NextFireDate compare:ExpiryDate];
NSLog(@"NSComparisonResult:%d",result);
if(result == NSOrderedDescending)
{
NSLog(@"Cancell......... Notification");
NSLog(@"notify :::%@",notify);
}
else
{
NSLog(@"Re-Schedule Notification");
BadgeNumber = BadgeNumber + 1;
notify.applicationIconBadgeNumber = BadgeNumber;
NSLog(@"BadgeNumber:%d",BadgeNumber);
[[UIApplication sharedApplication] scheduleLocalNotification:notify];
}
}
}
-(NSDate*) CalculateExipiryDateForMonth
{
NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *components = [[NSDateComponents alloc] init];
components.month = 1;
NSDate *nextMonth = [gregorian dateByAddingComponents:components toDate:[NSDate date] options:0];
[components release];
NSDateComponents *nextMonthComponents = [gregorian components:NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit fromDate:nextMonth];
NSDate *expiryDay = [gregorian dateFromComponents:nextMonthComponents];
NSDateComponents *dayComponent = [[NSDateComponents alloc] init];
dayComponent.day = -1;
NSDate *NewExpiry = [gregorian dateByAddingComponents:dayComponent toDate:expiryDay options:0];
[gregorian release];
[dayComponent release];
NSDateFormatter *formatter = [[[NSDateFormatter alloc] init] autorelease];
[formatter setDateFormat:@"dd/MM/yyyy"];
NSLog(@"Next Exipiry Date -----:%@",[formatter stringFromDate:NewExpiry]);
return NewExpiry;
}