// 本地註冊通知的方法
+ (void)registerLocalNotification:
 
(NSInteger)alertTime;

+ (void)registerLocalNotification:(NSInteger)alertTime
{
    // 例項化一個本地通知物件.
    UILocalNotification * notification = [[UILocalNotification alloc] init];

    // 設定什麼時間點(具體的時間)觸發本地通知. 距離現在多少秒之後.
 

    notification.fireDate = [NSDate dateWithTimeIntervalSinceNow:alertTime];

    // 設定時區,default手機時區
    notification.timeZone = [NSTimeZone defaultTimeZone];

    // 設定重複間隔, 按秒計算.
    notification.repeatInterval = kCFCalendarUnitSecond;

    // 彈出的通知內容, 下拉選單的通知.
    notification.alertBody = @"快遲到了!";
    // 氣泡個數
 

    notification.applicationIconBadgeNumber = 1;

    // 通知被觸發時播放聲音嗎?
    notification.soundName = UILocalNotificationDefaultSoundName;

    // 通知的引數
    NSDictionary * userDict = [NSDictionary dictionaryWithObject:@"起床洗漱了" forKey:@"hurry"];
    notification.userInfo = userDict;

    // 最後一步, 將這個通知啟用.
    [[UIApplication sharedApplication] scheduleLocalNotification:notification];
}

#pragma mark本地通知代理
// 做過iOS 開發的人對這個函式都會很熟悉，這是在程式結束啟動，並即將執行時呼叫的，通常一些初始化的工作可以在這個函式中處理。
- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification*)notification{
    //在此時設定解析notification，並展示提示檢視
    NSString * message = [notification.userInfo valueForKey:@"hurry"];
    UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"aaaa" message:message delegate:self cancelButtonTitle:@"取消" otherButtonTitles: nil];
    [alert show];

    // 既然已經查看了這個通知, 那麼氣泡就要減少一個
    NSInteger badge = [[UIApplication  sharedApplication] applicationIconBadgeNumber];
    badge --;
    [UIApplication sharedApplication].applicationIconBadgeNumber = badge;
}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.

    // ios8後，需要新增這個註冊，才能得到授權
    if ([[UIApplication sharedApplication] respondsToSelector:@selector(registerUserNotificationSettings:)]) {
        UIUserNotificationType type =  UIUserNotificationTypeAlert | UIUserNotificationTypeBadge | UIUserNotificationTypeSound;
        UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:type categories:nil];
        [[UIApplication sharedApplication] registerUserNotificationSettings:settings];
    }else{ // ios8之前的申請許可權方法.
        [application registerForRemoteNotificationTypes:UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound];
    }
    return YES;
}

// 取消通知
[ViewController cancelLocalNotificationWithKey:@"hurry"];

// 根據傳入的key, 移除本地通知
+ (void)cancelLocalNotificationWithKey:(NSString *)key;

+ (void)cancelLocalNotificationWithKey:(NSString *)key
{
    // 從當前的app中找出所有的本地通知.
    NSArray * notificationArrray = [UIApplication sharedApplication].scheduledLocalNotifications;
    // 如果按照key尋找userInfo, 不為空則說明找到了.
    for (UILocalNotification * not in notificationArrray) {
        if ([not.userInfo valueForKey:key]) {
            [[UIApplication sharedApplication] cancelAllLocalNotifications];
        }
    }
}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Required, 註冊通知
    if ([[UIDevice currentDevice].systemVersion floatValue] >= 8.0) {
        //可以新增自定義categories
        [APService registerForRemoteNotificationTypes:( UIUserNotificationTypeBadge | UIUserNotificationTypeSound | UIUserNotificationTypeAlert) categories:nil];
    } else {
        //categories 必須為nil
        [APService registerForRemoteNotificationTypes:(UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound | UIRemoteNotificationTypeAlert) categories:nil];
    }

    // Required
    [APService setupWithOption:launchOptions];

    return YES;
}

- (void)application:(UIApplication *)applicationdidRegisterForRemoteNotificationsWithDeviceToken:(NSData *)pToken
// &
- (void)application:(UIApplication *)applicationdidFailToRegisterForRemoteNotificationsWithError:(NSError *)error

-(void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
// &
-(void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler

{
    "aps" : {
        "alert" : "You got your emails.",
        "badge" : 9,
        "sound" : "bingbong.aiff"
},
    "acme1" : "bar",
    "acme2" : 42
}