如何在iPhone中調用didReceiveLocalNotification：（UILocalNotification *）notification？

Question

我需要后台進程（用於調用Web服務）在應用啟動狀態后調用didReceiveLocalNotification：（UILocalNotification *）notification，該怎么做，請幫幫我。

提前致謝

我嘗試了這個：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];

    UILocalNotification *localNotif = [launchOptions objectForKey:UIApplicationLaunchOptionsLocalNotificationKey];
}

- (void)application:(UIApplication *)app didReceiveLocalNotification:(UILocalNotification *)notif
{
    if (app.applicationState == UIApplicationStateInactive )
    {
        NSLog(@"app not running");
    }
    else if(app.applicationState == UIApplicationStateActive )
    {
        NSLog(@"app running");
    }
}

Answer 1

這就是我創建本地通知的方式，該通知計划在此代碼運行的當天17:00進行。 觸發后，將調用-(void)application:didReceiveLocalNotification:方法。

NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
[calendar setTimeZone:[NSTimeZone localTimeZone]];

NSDateComponents *dateComponents = [calendar components:NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit fromDate:[NSDate date]];
[dateComponents setHour:17];
[dateComponents setMinute:00];
[dateComponents setSecond:00];

NSDate *notificationDate = [calendar dateFromComponents:dateComponents];

UILocalNotification *localNotif = [[UILocalNotification alloc] init];
localNotif.fireDate = notificationDate;
localNotif.timeZone = [NSTimeZone defaultTimeZone];

localNotif.alertBody = @"blah blah blah";
localNotif.alertAction = @"Ok";

localNotif.soundName = UILocalNotificationDefaultSoundName;
localNotif.applicationIconBadgeNumber = 1;

[[UIApplication sharedApplication] scheduleLocalNotification:localNotif];

Answer 2

在2種情況下收到通知

1. 在application:didFinishLaunchingWithOptions:方法中，如果該應用程序既不在運行又不在后台運行。
2. 在application:didReceiveLocalNotification:方法中，如果應用程序正在運行或在后台運行。 當應用程序已經運行時，幾乎沒有用來顯示警報。 因此，您僅在通知觸發時應用程序處於后台時才顯示警報。 要了解該應用程序是否正在從后台恢復，請使用applicationWillEnterForeground:方法。

升

  - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
            UILocalNotification *localNotif = [launchOptions objectForKey:UIApplicationLaunchOptionsLocalNotificationKey];  
            if (localNotif) {       
                // Show Alert Here
            }
    }