Question

我想为特定的EST时间设置本地通知，用户应该收到通知而不管用户的默认时区。比方说，如果我希望本地通知在美国东部时间中午12点到达，那么太平洋时区的某个人也应该在中午12点00:00（太平洋标准时间09:00）收到通知

这是我试图做的，但是当我将默认时区设置为EST时，我才收到通知

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

localNotif.repeatInterval = kCFCalendarUnitDay;
NSCalendar *calendar = [NSCalendar autoupdatingCurrentCalendar];
NSDate *today = [NSDate date];

NSDateComponents *dateComponents = [calendar components:( NSYearCalendarUnit |       NSMonthCalendarUnit |  NSDayCalendarUnit )
                                               fromDate:today];    
NSDateComponents *dateComps = [[NSDateComponents alloc] init];

[dateComps setDay:dateComponents.day];
[dateComps setMonth:dateComponents.month];
[dateComps setYear:dateComponents.year];

[dateComps setHour:12];
[dateComps setMinute:00];
[dateComps setSecond:00];

NSDate  *fireDate = [calendar dateFromComponents:dateComps];
localNotif.fireDate = fireDate;
localNotif.timeZone = [NSTimeZone timeZoneWithName:@"US/Eastern"];
localNotif.alertBody = @"Daily Notification";
localNotif.alertAction = NSLocalizedString(@"View", nil);
localNotif.soundName = UILocalNotificationDefaultSoundName;

NSDictionary *infoDict = [NSDictionary dictionaryWithObject:@"Daily Notification" forKey:@"acme"];
localNotif.userInfo = infoDict;

[[UIApplication sharedApplication] scheduleLocalNotification:localNotif];
[localNotif release];

有人能告诉我哪里出错了。

Answer 1

我在这里发现了问题。时区应该设置日期而不是通知，所以我必须添加这行代码：

[dateComps setTimeZone:[NSTimeZone timeZoneWithName:@"US/Eastern"]];

并且应该注释代码行：

localNotif.timeZone = [NSTimeZone timeZoneWithName:@"US/Eastern"];

无论用户的默认时区如何，都要为特定的EST时间设置本地通知

1 个答案: