对于iOS中的用户时区，本地通知设置默认时间为上午9:00

Question

我想为每个用户的时区时间设置通知默认9:00 。

如何在默认时间上午9:00 创建开火日期。

Answer 1

你好，我得到了这个答案： -

NSDate *pickerDate = [NSDate date]; 
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];
    [dateFormatter setDateFormat:DT_FORMATE_BIRTHDATE];
    NSTimeZone *gmt = [NSTimeZone timeZoneWithAbbreviation:DT_TIME_ZONE_GMT];
    [dateFormatter setTimeZone:gmt];

    NSCalendar *calendar = [NSCalendar autoupdatingCurrentCalendar];
    NSDateComponents *timeComponents = [calendar components:( NSYearCalendarUnit | NSMonthCalendarUnit |  NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit )
                                                   fromDate:pickerDate];
    [timeComponents setHour:9];
    [timeComponents setMinute:00];
    [timeComponents setSecond:0];

    NSDate *dtFinal = [calendar dateFromComponents:timeComponents];
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"yyyy-MM-dd HH:mm:ss Z"];

    NSString *fierDate = [formatter stringFromDate:dtFinal];

Answer 2

1. This是关于本地通知的完整教程

2. 下面是解决上面提到的时区问题。请详细查看这些时区功能，并在功能中设置适当的时区。

[NSTimeZone defaultTimeZone]

[NSTimeZone systemTimeZone]

[NSTimeZone localTimeZone]

NSTimeZone: what is the difference between localTimeZone and systemTimeZone?

Answer 3

试试这段代码。

 NSDate *pickerDate = [date_picker date];
// Schedule the notification
UILocalNotification* localNotification = [[UILocalNotification alloc] init];
localNotification.fireDate = pickerDate;
localNotification.alertBody = @"Alert Body Message";
localNotification.alertAction = @"Alert Action Message";
localNotification.timeZone = [NSTimeZone defaultTimeZone];
[[UIApplication sharedApplication] scheduleLocalNotification:localNotification];