UILocalNotification

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

    UILocalNotification *notification = [[UILocalNotification alloc] init];
    
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"HH:mm:ss"];
    // 触发通知的时间
    NSDate *now = [formatter dateFromString:@"15:04:00"];
    notification.fireDate = now;
    // 设置时区，默认即可
    notification.timeZone=[NSTimeZone defaultTimeZone];
    // 通知重复提示的单位，可以是天、周、月
    notification.repeatInterval = NSDayCalendarUnit;
    // 通知内容
    notification.alertBody = @"这是一个新的通知";
    // 通知被触发时播放的声音
    notification.soundName = UILocalNotificationDefaultSoundName;
    // 设置IconBadgeNumber
    notification.applicationIconBadgeNumber = [[[UIApplication sharedApplication] scheduledLocalNotifications] count]+1;
    // 设置本地通知发送的消息，这个消息可以接受
    NSDictionary *infoDict = [NSDictionary dictionaryWithObjectsAndKeys:@"setNotificationForEveryDay", @"key", nil];
    notification.userInfo = infoDict;
    //执行通知注册
    [[UIApplication sharedApplication] scheduleLocalNotification:notification];

    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];
    return YES;
}

// 应用收到通知时，会调到下面的回调函数
- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification
{
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"LocalNotification" message:notification.alertBody delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil];
    [alert show];
    
    //这里可以接受到本地通知中心发送的消息
    NSDictionary* dic = notification.userInfo;
    
    // 图标上的数字减1
    application.applicationIconBadgeNumber -= 1;
    
    NSLog(@"user info = %@",[dic objectForKey:@"key"]);
}