错误的触发日期 UILocalNotification - 触发日期提前一小时
Wrong fire date UILocalNotification - fire date is one hour ahead
我想将 UILocalNotification 设置为在特定时间关闭。该应用程序处理餐厅预订。如果进行了预订并且约会距离现在超过 2 小时,那么我想在它之前 2 小时显示通知。如果它大于 1 小时,那么我要在手前 1 小时显示它,否则我想在手前 15 分钟显示它。我遇到的困难是我的 UILocalNotification 触发时间错误 + 1 hour
。下面是使用的代码:
[self setLocalNotificationWithAlertBody:@"Alert Body goes here" AndWithBookingDateString:@"2015-09-07 19:45:00"];//the booking time
-(void)setLocalNotificationWithAlertBody:(NSString *)body AndWithBookingDateString:(NSString *)dateString{
NSLog(@"Date String %@",dateString);
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setTimeZone:[NSTimeZone timeZoneWithAbbreviation:@"GMT"]];
[dateFormatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"]];
[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSDate *dateFromString = [[NSDate alloc] init];
dateFromString = [dateFormatter dateFromString:dateString];
NSLog(@"Date from String %@",[dateFormatter dateFromString:dateString]);
[self setLocalNotificationWithAlertBody:body AndWithBookingDate:dateFromString];
}
-(void)setLocalNotificationWithAlertBody: (NSString *) body AndWithBookingDate: (NSDate *)date{
NSDate *currentDate = [NSDate date];
NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *components = [calendar components:NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit|NSHourCalendarUnit
fromDate:currentDate
toDate:date
options:0];
UILocalNotification* localNotification = [[UILocalNotification alloc] init];
NSInteger hour = [components hour];
if (components.hour>=2) {//remind the user 2 hours before hand if booking is made greater than 2 hours
NSTimeInterval secondsPerHour = (60 * 60)*2;//two hours before appointment
NSDate *givenDate = date; // what you have already
NSDate *earlierDate = [givenDate dateByAddingTimeInterval:-secondsPerHour];
NSLog(@"\n\n Greater than 2 hours %@ \n\n",earlierDate);
localNotification.fireDate=earlierDate;
localNotification.alertBody = [NSString stringWithFormat:@"%@ %@",body,[self getDeviceShortDateFromString:[NSString stringWithFormat:@"%@",date] WithFormat:@"yyyy-MM-dd HH:mm:ss ZZZZZ"]];
}
else if (components.hour>1) {
NSTimeInterval secondsPerHour = 60 * 60;
NSDate *givenDate = date; // what you have already
NSDate *earlierDate = [givenDate dateByAddingTimeInterval:-secondsPerHour];
NSLog(@"\n\n Greater than an hour %@ \n\n",earlierDate);
localNotification.fireDate=earlierDate;
localNotification.alertBody = [NSString stringWithFormat:@"%@ %@",body,[self getDeviceShortDateFromString:[NSString stringWithFormat:@"%@",date] WithFormat:@"yyyy-MM-dd HH:mm:ss ZZZZZ"]];
}
else{
NSTimeInterval secondsPer15mins = 15 * 60;
NSDate *givenDate = date; // what you have already
NSDate *earlierDate = [givenDate dateByAddingTimeInterval:-secondsPer15mins];
NSLog(@"\n\n Less than one hour %@ \n",earlierDate);
localNotification.fireDate=earlierDate;
localNotification.alertBody = [NSString stringWithFormat:@"%@ %@",body,[self getDeviceShortDateFromString:[NSString stringWithFormat:@"%@",date] WithFormat:@"yyyy-MM-dd HH:mm:ss ZZZZZ"]];
}
localNotification.userInfo = @{@"key" : body};
[[UIApplication sharedApplication] scheduleLocalNotification:localNotification];
NSLog(@"Fire date %@",localNotification.fireDate);
NSLog(@"Notification--->: %@", localNotification);
}
-(NSString *)getDeviceShortDateFromString: (NSString *) date WithFormat: (NSString *)format{
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"]];
[dateFormatter setDateFormat:format];
NSDate * tempDate =[dateFormatter dateFromString: date];
NSDateFormatter *dateFormatter2 = [[NSDateFormatter alloc] init];
[dateFormatter2 setDateFormat:@"MMM yyyy"];
if (tempDate == nil) {
return @" ";
}
return [dateFormatter2 stringFromDate:tempDate];
}
开火日期记录为:
Fire date 2015-09-07 17:45:00 +0000
但是本地通知错误:
Notification--->: <UIConcreteLocalNotification: 0x174178300>{fire date = Monday 7 September 2015 18:45:00 Irish Summer Time, time zone = (null), repeat interval = 0, repeat count = UILocalNotificationInfiniteRepeatCount, next fire date = Monday 7 September 2015 18:45:00 Irish Summer Time, user info = {
key = "Alert Body Goes here";
}}
预约时间超过 2 小时,因此通知应该在 5:45 发出,但直到 6:45 才发出。非常感谢任何帮助。
"Help me Whosebug, you're my only hope":)
对于依赖于特定位置结果的可缩放应用,请确保您的特定位置属性始终指向用户的相对位置。在你的例子中,你只是忽略了一个简单的设置:
[dateFormatter setTimeZone:[NSTimeZone timeZoneWithAbbreviation:@"GMT"]];
对你来说,这是 +1 小时,但对其他人来说,它会有所不同,有些会提前,有些会落后,因为你的 fireDate 是基于 GMT 时间。
我只想将其更改为 [NSTimeZone systemTimeZone]
我想将 UILocalNotification 设置为在特定时间关闭。该应用程序处理餐厅预订。如果进行了预订并且约会距离现在超过 2 小时,那么我想在它之前 2 小时显示通知。如果它大于 1 小时,那么我要在手前 1 小时显示它,否则我想在手前 15 分钟显示它。我遇到的困难是我的 UILocalNotification 触发时间错误 + 1 hour
。下面是使用的代码:
[self setLocalNotificationWithAlertBody:@"Alert Body goes here" AndWithBookingDateString:@"2015-09-07 19:45:00"];//the booking time
-(void)setLocalNotificationWithAlertBody:(NSString *)body AndWithBookingDateString:(NSString *)dateString{
NSLog(@"Date String %@",dateString);
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setTimeZone:[NSTimeZone timeZoneWithAbbreviation:@"GMT"]];
[dateFormatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"]];
[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSDate *dateFromString = [[NSDate alloc] init];
dateFromString = [dateFormatter dateFromString:dateString];
NSLog(@"Date from String %@",[dateFormatter dateFromString:dateString]);
[self setLocalNotificationWithAlertBody:body AndWithBookingDate:dateFromString];
}
-(void)setLocalNotificationWithAlertBody: (NSString *) body AndWithBookingDate: (NSDate *)date{
NSDate *currentDate = [NSDate date];
NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *components = [calendar components:NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit|NSHourCalendarUnit
fromDate:currentDate
toDate:date
options:0];
UILocalNotification* localNotification = [[UILocalNotification alloc] init];
NSInteger hour = [components hour];
if (components.hour>=2) {//remind the user 2 hours before hand if booking is made greater than 2 hours
NSTimeInterval secondsPerHour = (60 * 60)*2;//two hours before appointment
NSDate *givenDate = date; // what you have already
NSDate *earlierDate = [givenDate dateByAddingTimeInterval:-secondsPerHour];
NSLog(@"\n\n Greater than 2 hours %@ \n\n",earlierDate);
localNotification.fireDate=earlierDate;
localNotification.alertBody = [NSString stringWithFormat:@"%@ %@",body,[self getDeviceShortDateFromString:[NSString stringWithFormat:@"%@",date] WithFormat:@"yyyy-MM-dd HH:mm:ss ZZZZZ"]];
}
else if (components.hour>1) {
NSTimeInterval secondsPerHour = 60 * 60;
NSDate *givenDate = date; // what you have already
NSDate *earlierDate = [givenDate dateByAddingTimeInterval:-secondsPerHour];
NSLog(@"\n\n Greater than an hour %@ \n\n",earlierDate);
localNotification.fireDate=earlierDate;
localNotification.alertBody = [NSString stringWithFormat:@"%@ %@",body,[self getDeviceShortDateFromString:[NSString stringWithFormat:@"%@",date] WithFormat:@"yyyy-MM-dd HH:mm:ss ZZZZZ"]];
}
else{
NSTimeInterval secondsPer15mins = 15 * 60;
NSDate *givenDate = date; // what you have already
NSDate *earlierDate = [givenDate dateByAddingTimeInterval:-secondsPer15mins];
NSLog(@"\n\n Less than one hour %@ \n",earlierDate);
localNotification.fireDate=earlierDate;
localNotification.alertBody = [NSString stringWithFormat:@"%@ %@",body,[self getDeviceShortDateFromString:[NSString stringWithFormat:@"%@",date] WithFormat:@"yyyy-MM-dd HH:mm:ss ZZZZZ"]];
}
localNotification.userInfo = @{@"key" : body};
[[UIApplication sharedApplication] scheduleLocalNotification:localNotification];
NSLog(@"Fire date %@",localNotification.fireDate);
NSLog(@"Notification--->: %@", localNotification);
}
-(NSString *)getDeviceShortDateFromString: (NSString *) date WithFormat: (NSString *)format{
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"]];
[dateFormatter setDateFormat:format];
NSDate * tempDate =[dateFormatter dateFromString: date];
NSDateFormatter *dateFormatter2 = [[NSDateFormatter alloc] init];
[dateFormatter2 setDateFormat:@"MMM yyyy"];
if (tempDate == nil) {
return @" ";
}
return [dateFormatter2 stringFromDate:tempDate];
}
开火日期记录为:
Fire date 2015-09-07 17:45:00 +0000
但是本地通知错误:
Notification--->: <UIConcreteLocalNotification: 0x174178300>{fire date = Monday 7 September 2015 18:45:00 Irish Summer Time, time zone = (null), repeat interval = 0, repeat count = UILocalNotificationInfiniteRepeatCount, next fire date = Monday 7 September 2015 18:45:00 Irish Summer Time, user info = {
key = "Alert Body Goes here";
}}
预约时间超过 2 小时,因此通知应该在 5:45 发出,但直到 6:45 才发出。非常感谢任何帮助。
"Help me Whosebug, you're my only hope":)
对于依赖于特定位置结果的可缩放应用,请确保您的特定位置属性始终指向用户的相对位置。在你的例子中,你只是忽略了一个简单的设置:
[dateFormatter setTimeZone:[NSTimeZone timeZoneWithAbbreviation:@"GMT"]];
对你来说,这是 +1 小时,但对其他人来说,它会有所不同,有些会提前,有些会落后,因为你的 fireDate 是基于 GMT 时间。
我只想将其更改为 [NSTimeZone systemTimeZone]