xcode - 按時間安排本地通知（每天早上6點）

Question

我正在使用Xcode 4.3.2，如何在每天早上6點設置本地通知「dateToFire」？

-(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]; 
} 

Answer 1

使用CalendarComponents到小時設置爲6，並設置localNotification.repeatInterval到NSDayCalendarUnit

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];