iPhone本地通知將不會出現

可能重複：
UILocalNotification isn't working at all iPhone本地通知將不會出現

我正在寫通過通知中心向用戶發送警報，當一個事件日期日益臨近的應用。但是，當我在日期選擇器中設置日期並關閉應用程序時，通知不會顯示。我已在我的配置文件中啓用了推送通知。這一切在我的項目，與通知中心打交道的代碼，這是所有的代碼在處理日期選取器我的視圖控制器文件：

- (IBAction)dateChanged:(id)sender 
{ 
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; 

    NSDate *selectedDate = [self.datePicker date]; 

    [defaults setObject:selectedDate forKey:@"ImportantDatesViewController.selectedDate"]; 
    [defaults synchronize]; 

} 

- (void)viewDidLoad { 
    NSDate *storedDate = [[NSUserDefaults standardUserDefaults] 
          objectForKey:@"ImportantDatesViewController.selectedDate"]; 
    if (storedDate == nil) { 
     storedDate = [NSDate date]; 
    } 

    [self.datePicker setDate:storedDate animated:NO]; 

}

而這一切都在我的應用程序委託處理本地通知：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 
{ 
.... 

[[UIApplication sharedApplication] registerForRemoteNotificationTypes: 
    UIRemoteNotificationTypeBadge | 
    UIRemoteNotificationTypeAlert | 
    UIRemoteNotificationTypeSound]; 

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

    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; 
    [dateFormatter setDateFormat:@"mm'/'dd'/'yyyy"]; 

    NSDate *eventDate = [[NSUserDefaults standardUserDefaults] objectForKey:@"ImportantDatesViewController.selectedDate"]; 



    localNotif.fireDate = [eventDate dateByAddingTimeInterval:-13*60*60]; 
    localNotif.timeZone = [NSTimeZone defaultTimeZone]; 


    localNotif.alertBody = @"Event in three days!"; 

    localNotif.alertAction = nil; 

    localNotif.soundName = UILocalNotificationDefaultSoundName; 
    localNotif.applicationIconBadgeNumber = 0; 
    [[UIApplication sharedApplication] scheduleLocalNotification:localNotif];  

    return YES; 

} 

- (void)application:(UIApplication*)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData*)deviceToken 
{ 
    NSString* pushToken = [[[[deviceToken description] 
          stringByReplacingOccurrencesOfString:@"<"withString:@""] 
          stringByReplacingOccurrencesOfString:@">" withString:@""] 
          stringByReplacingOccurrencesOfString: @" " withString: @""]; 

    NSLog(@"%@", pushToken); 

} 

- (void)application:(UIApplication*)application didFailToRegisterForRemoteNotificationsWithError:(NSError*)error { 

    NSLog(@"error: %@", error); 
}

任何幫助非常感謝，謝謝！

來源

2012-01-22 John

恐怕我可能在另一個問題上感到困惑，當我從'NSUserDefaults'中檢索時使用鍵的名稱。這是個人喜好的問題，以確保密鑰是唯一的。事情的真相是，你應該使用你用來存儲它的任何東西來檢索它。找到你正在存儲'eventDate'的地方並使用相同的密鑰。 –

非常感謝Mark。我試圖確定我在哪裏存儲eventDate，但我遇到了一些問題。它可能在我的筆尖採摘器中嗎？ – John

在哪個視圖控制器中，您要求用戶輸入此日期是否要觸發本地通知？在那個類中，在某個地方，你將一個日期存儲到'NSUserDefaults'中。使用相同的密鑰。現在你明白了爲什麼我提到將鍵存儲爲常量。 :) –

以下代碼用於本地通知。

-(IBAction)buttonPressed:(UIButton *)button 
{ 
    UILocalNotification *localNotification = [[UILocalNotification alloc] init]; 

    if (!localNotification) 
     return; 

    // Current date 
    NSDate *date = [NSDate date]; 

    // Add one minute to the current time 
    NSDate *dateToFire = [date dateByAddingTimeInterval:20]; 

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

    // Create a payload to go along with the notification 
    NSArray *array = [NSArray arrayWithObjects:@"Value 1", @"Value 2", nil]; 
    NSDictionary *data = [NSDictionary dictionaryWithObject:array forKey:@"payload"]; 
    [localNotification setUserInfo:data]; 

    if (button == buttonAlert || button == buttonAll) 
    { 
     // Setup alert notification 
     [localNotification setAlertBody:@"Incoming Local Notification" ]; 
     [localNotification setAlertAction:@"Open App"]; 
     [localNotification setHasAction:YES]; 
    } 

    if (button == buttonBadge || button == buttonAll) 
    { 
     // Set badge notification, increment current badge value 
     [localNotification setApplicationIconBadgeNumber:[[UIApplication sharedApplication] applicationIconBadgeNumber] + 1]; 
    } 

    if (button == buttonSound || button == buttonAll) 
    { 
     // Setup sound notification 
     [localNotification setSoundName:UILocalNotificationDefaultSoundName]; 
    } 

    // Schedule the notification 
    [[UIApplication sharedApplication] scheduleLocalNotification:localNotification]; 
}

來源

2012-01-22 06:21:42

iPhone本地通知將不會出現

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