ios - 不同时间的本地通知重复

Question

我有一个生成祈祷时间(每天 5 次)的应用程序，我想为 5 次祈祷创建通知，但问题是时间根据一些计算每天都在变化。

编辑:

计算是根据 GPS 位置完成的，因此当用户更改到另一个城市时，时间将相应更新。我将日期、时区、GPS 坐标输入到一个方法中，然后我得到给定日期/位置的 (HH:mm) 格式的祈祷时间值。现在我需要设置通知。我不确定在哪里设置它们。

这是代码

#import "PrayerTimeViewController.h"
#import "PrayTime.h"

@implementation PrayerTimeViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
        UITabBarItem *tbi = [self tabBarItem];
        [tbi setTitle:NSLocalizedString(@"PrayerTimes", nil)];
        UIImage *i = [UIImage imageNamed:@"11-clock"];

        [tbi setImage:i];
        [i release];
    }
    return self;
}

- (void)didReceiveMemoryWarning
{
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];

    // Release any cached data, images, etc that aren't in use.
}

#pragma mark - View lifecycle

- (void)viewDidLoad
{   

    [super viewDidLoad];

    // Do any additional setup after loading the view from its nib.

    UIColor *background = [[UIColor alloc] initWithPatternImage:[UIImage imageNamed:@"Madinah"]];
    self.view.backgroundColor = background;
    [background release];

    locationManager = [[CLLocationManager alloc]init];
    [locationManager setDelegate:self];
    [locationManager setDesiredAccuracy:kCLLocationAccuracyBest];
    [locationManager setDistanceFilter:kCLDistanceFilterNone];
    [locationManager startUpdatingLocation];
}

- (void)viewDidUnload
{
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
    NSTimeInterval t = [[newLocation timestamp] timeIntervalSinceNow];
    if (t < -180) {
        return;
    }

    PrayTime *prayerTime = [[PrayTime alloc]init];
    [prayerTime setCalcMethod:0];
    [prayerTime setFajrAngle:16];
    [prayerTime setIshaAngle:14];
    [prayerTime setAsrMethod:0];



    NSDate *curentDate = [NSDate date];
    NSCalendar* calendar = [NSCalendar currentCalendar];
    NSDateComponents* compoNents = [calendar components:NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit fromDate:curentDate];     
    CLLocationCoordinate2D currLoc = [newLocation coordinate];


    NSMutableArray *prayerCal = [prayerTime getDatePrayerTimes:[compoNents year]  andMonth:[compoNents month] andDay:[compoNents day] andLatitude:currLoc.latitude andLongitude:currLoc.longitude andtimeZone:[[NSTimeZone localTimeZone] secondsFromGMT]/3600];
    [prayerTime release];

    [fajer setText:[prayerCal objectAtIndex:0]];
//    UILocalNotification *localNotification = [[UILocalNotification alloc] init];

    NSString *time = [prayerCal objectAtIndex:0];
    NSString *dates = [NSString stringWithFormat:@"%d-%d-%d %@",[compoNents year],[compoNents month],[compoNents day],time];


    NSDateFormatter *dateText = [[NSDateFormatter alloc]init];
    [dateText setDateFormat:@"yyyy-MM-dd HH:mm"];
    [dateText setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:[[NSTimeZone localTimeZone] secondsFromGMT]]];

    NSLog(@"%@",[dateText dateFromString:dates]);

    [shrooq setText:[prayerCal objectAtIndex:1]];

    [duhur setText:[prayerCal objectAtIndex:2]];

    [aser setText:[prayerCal objectAtIndex:3]];

    [maghreb setText:[prayerCal objectAtIndex:5]];

    [isha setText:[prayerCal objectAtIndex:6]];

    [prayerCal release];

}



@end

Answer 1

您可以使用repeatInterval 参数来重复您的五个通知，使它们每天在同一时间出现。遗憾的是，如果不运行您的应用，就无法调整时间。

您可以在后台运行 GPS 应用程序，但仅用于设置一些计时器会非常耗电。 (这个后台进程实际上是为 GPS 跟踪器应用程序设计的。我不确定 Apple 会如何将它用于稍微不同的目的。)

但最简单的方法是在应用启动时进行更新。当它启动时，您将获得当前通知(使用 UIApplication 的 scheduledLocalNotifications 属性)，如果它们不正确或已过时则取消它们并创建新通知。每个通知都有一个字典有效负载，您可以使用它来更轻松地识别您的警报。