/// 一般在在启动时注册通知，程序被杀死，点击通知后调用此程序
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
 if ([[UIDevice currentDevice].systemVersion floatValue] >= 8.0) { // iOS8
 UIUserNotificationSettings *setting = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeBadge | UIUserNotificationTypeAlert | UIUserNotificationTypeSound categories:nil];
 [application registerUserNotificationSettings:setting];
 }

 if (launchOptions[UIApplicationLaunchOptionsLocalNotificationKey]) {
 // 这里添加处理代码
 }
 return YES;
}
/// 程序没有被杀死（处于前台或后台），点击通知后会调用此程序
- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification {
 // 这里添加处理代码
}

- (IBAction)addLocalNotification {
 // 1.创建一个本地通知
 UILocalNotification *localNote = [[UILocalNotification alloc] init];

 // 1.1.设置通知发出的时间
 localNote.fireDate = [NSDate dateWithTimeIntervalSinceNow:5];

 // 1.2.设置通知内容
 localNote.alertBody = @"这是一个推送这是一个推送";

 // 1.3.设置锁屏时,字体下方显示的一个文字
 localNote.alertAction = @"赶紧!!!!!";
 localNote.hasAction = YES;

 // 1.4.设置启动图片(通过通知打开的)
 localNote.alertLaunchImage = @"../Documents/IMG_0024.jpg";

 // 1.5.设置通过到来的声音
 localNote.soundName = UILocalNotificationDefaultSoundName;

 // 1.6.设置应用图标左上角显示的数字
 localNote.applicationIconBadgeNumber = 999;

 // 1.7.设置一些额外的信息
 localNote.userInfo = @{@"qq" : @"704711253", @"msg" : @"success"};

 // 2.执行通知
 [[UIApplication sharedApplication] scheduleLocalNotification:localNote];
}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
 // iOS8之后和之前应区别对待
 if ([[UIDevice currentDevice].systemVersion floatValue] >= 8.0) {
 UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeBadge | UIUserNotificationTypeAlert | UIUserNotificationTypeSound categories:nil];
 [[UIApplication sharedApplication] registerUserNotificationSettings:settings];
 } else {
 [application registerForRemoteNotificationTypes:UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeBadge | UIUserNotificationTypeSound];
 }

 return YES;
}
/// 这个函数存在的意义在于：当用户在设置中关闭了通知时，程序启动时会调用此函数，我们可以获取用户的设置
- (void)application:(UIApplication *)application didRegisterUserNotificationSettings:(UIUserNotificationSettings *)notificationSettings {
 [application registerForRemoteNotifications];
}

/// 注册失败调用
- (void)application:(UIApplication *)application didFailToRegisterForRemoteNotificationsWithError:(NSError *)error {
 NSLog(@"远程通知注册失败：%@",error);
}

/// 用户同意后，会调用此程序，获取系统的deviceToken，应把deviceToken传给服务器保存，此函数会在程序每次启动时调用(前提是用户允许通知)
- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {
 NSLog(@"deviceToken = %@",deviceToken);
}

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

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

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
 // 获取远程推送消息
 NSDictionary *userInfo = launchOptions[UIApplicationLaunchOptionsRemoteNotificationKey];
 if (userInfo) {
 // 有推送的消息，处理推送的消息
 }
 return YES;
}
/// iOS3之后才有，只有在程序处于后台时，用户点击了通知后才会被调用，应搭配didFinishLaunchingWithOptions使用
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo {
 // userInfo
}

{
 "aps" : {   // 必须有
 "alert" : "string",
 "body" : "string",
 "badge" : number,
 "sound" : "string"
 },
 "NotiId" : 20150821, // 自定义key值
}