如何在iPhone中调用didReceiveLocalNotification：（UILocalNotification *）notification？

Question

我需要后台进程（用于调用Web服务）在应用启动状态后调用didReceiveLocalNotification：（UILocalNotification *）notification，该怎么做，请帮帮我。

提前致谢

我尝试了这个：

- (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

这就是我创建本地通知的方式，该通知计划在此代码运行的当天17:00进行。 触发后，将调用-(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种情况下收到通知

1. 在application:didFinishLaunchingWithOptions:方法中，如果该应用程序既不在运行又不在后台运行。
2. 在application:didReceiveLocalNotification:方法中，如果应用程序正在运行或在后台运行。 当应用程序已经运行时，几乎没有用来显示警报。 因此，您仅在通知触发时应用程序处于后台时才显示警报。 要了解该应用程序是否正在从后台恢复，请使用applicationWillEnterForeground:方法。

升

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