关于 iphone:xcode – 定时本地通知(每天早上 6 点)

xcode - scheduled local notification with time ( Everyday at 6AM )

我使用的是 Xcode 4.3.2，我如何在每天早上 6 点设置此本地通知"dateToFire"？

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-(void)notification
{
UILocalNotification *localNotification = [[[UILocalNotification alloc] init] autorelease];

if (!localNotification)
return;

// Current date
NSDate *date = [NSDate date];
NSDate *dateToFire = //Everyday: 6AM;

// Set the fire date/time
[localNotification setFireDate:dateToFire];
[localNotification setTimeZone:[NSTimeZone defaultTimeZone]];
[localNotification setAlertBody:@"Notification" ];

[[UIApplication sharedApplication] scheduleLocalNotification:localNotification];
}

- (void)viewDidLoad
{
[super viewDidLoad];
[self notification];
}

使用 CalendarComponents 将小时设置为 6，并将 localNotification.repeatInterval 设置为 NSDayCalendarUnit

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NSCalendar *calendar = [NSCalendar currentCalendar]; // gets default calendar
NSDateComponents *components = [calendar components:(NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit) fromDate:[NSDate date]]; // gets the year, month, day,hour and minutesfor today's date
[components setHour:18];
[components setMinute:0];

localNotification.fireDate = [calendar dateFromComponents:components];