推送通知

UILocalNotification *ln = [[UILocalNotification alloc] init];

property(nonatomic,copy) NSDate *fireDate;

@property(nonatomic,copy) NSString *alertBody;

@property(nonatomic,copy) NSString *alertAction;

@property(nonatomic,copy) NSString *soundName;

@property(nonatomic) NSInteger applicationIconBadgeNumber;

[[UIApplication sharedApplication] scheduleLocalNotification:ln];

@property(nonatomic,copy) NSArray *scheduledLocalNotifications;

- (void)cancelLocalNotification:(UILocalNotification *)notification;

- (void)cancelAllLocalNotifications;

- (void)presentLocalNotificationNow:(UILocalNotification *)notification;

@property(nonatomic) NSCalendarUnit repeatInterval;

@property(nonatomic,copy) NSString *alertLaunchImage;

@property(nonatomic,copy) NSDictionary *userInfo;

@property(nonatomic,copy) NSTimeZone *timeZone;

- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification;

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

launchOptions参数通过UIApplicationLaunchOptionsLocalNotificationKey取出本地推送通知对象

UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeBadge | UIUserNotificationTypeSound | UIUserNotificationTypeAlert categories:nil];

[application registerUserNotificationSettings:settings];

//  在iOS8之后,Apple对用户隐私要求更加严格,所有很多东西都需要请求用户权限
    
    if ([UIDevice currentDevice].systemVersion.doubleValue >= 8.0) {
        
        /*
         
         UIUserNotificationTypeNone    = 0,      // 不展示通知
         UIUserNotificationTypeBadge   = 1 << 0, // 应用图标右上角的红色数字权限
         UIUserNotificationTypeSound   = 1 << 1, // 提示音的权限
         UIUserNotificationTypeAlert   = 1 << 2, // 弹窗或横幅的权限
         */
//       权限类型
        UIUserNotificationType types = UIUserNotificationTypeBadge|UIUserNotificationTypeSound|UIUserNotificationTypeAlert;
//      用户通知设置
        UIUserNotificationSettings *setting = [UIUserNotificationSettings settingsForTypes:types  categories:nil];
//      注册用户设置,用户的请求窗口会弹出一次
        [[UIApplication sharedApplication] registerUserNotificationSettings:setting];
    }

//  1.创建本地通知对象
    UILocalNotification *ln = [[UILocalNotification alloc] init];
    
    //  2.设置本地通知属性
    //************************************************************/
    //  什么时候发送这个本地通知
    ln.fireDate = [NSDate dateWithTimeIntervalSinceNow:5];
    //  设置通知的内容
    ln.alertBody = alertBody;
    //  设置提示音,如果用户是静音,它自动会转为震动
    ln.soundName = UILocalNotificationDefaultSoundName;
    //  应用图标
    ln.applicationIconBadgeNumber = 10;
    //  当用用户点击通知时候,进入应用程序,要不要显示启动图标
    ln.alertLaunchImage = @"UILaunchImageFile";
//  用户信息(比如界面跳转的信息)
    ln.userInfo = userInfo;
    //************************************************************/

    //  调度本地通知
    [[UIApplication sharedApplication] scheduleLocalNotification:ln];

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
//  如果应用程序被杀死了,我们需要在这里处理界面跳转
    
//  1.从应用程序的加载项取出本地通知对象
    UILocalNotification *ln  = launchOptions[UIApplicationLaunchOptionsLocalNotificationKey];
    
//  2.如果存在这个对象,表示用户是点击本地通知进入到应用的
    if (ln) {
//      跳转界面
        [self jumpToPageWithLocalNotification:ln];
    }

    return YES;
}


/**
  1.当收到本地通知就会调用该代理方法
  调用场景
  1.如果应用程序在后台,当点击通知的时候
  2.如果应用程序在前台,一旦收到本地通知,就会调用该方法
  3.如果应用程序被杀死了,那么这个方法就不再执行了
 */
- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification
{
    /*
     UIApplicationStateActive,    活动
     UIApplicationStateInactive,  活动与后台切换的一种状态
     UIApplicationStateBackground 后台
     */
//  如果应用在前台,就不要跳转界面了
    if (application.applicationState == UIApplicationStateActive) {
        return;
    }
//  跳转界面
    [self jumpToPageWithLocalNotification:notification];

}

///跳转界面
- (void) jumpToPageWithLocalNotification:(UILocalNotification *) notification
{
    //    NSLog(@"%s",__func__);
    //  取出用户信息
    NSDictionary *userInfo = notification.userInfo;
    //  拿到跳转到索引
    NSInteger index = [userInfo[@"index"] integerValue];
    
    //  获取根控制
    UITabBarController *tabVc   = (UITabBarController *)self.window.rootViewController;
    
    //  跳转界面
    tabVc.selectedIndex = index;
}