iOS 本地通知（未完待续）-优快云博客

本文详细介绍了iOS中本地通知的两种实现方式：UILocalNotification和UserNotification.framework。从权限申请、通知配置到接收处理，提供了丰富的代码示例和注意事项。

本地通知常用来作为本地提醒，提醒用户待办事项，事物提醒，位置提示等功能 iOS 10.0前，本地通知通知使用的是UILocalNotification，10.0后，苹果推送了专门用户通知提醒的库UserNotificaiton.framework

1.使用 UILocalNotification

在iOS8.0之前，通知权限默认开启，可直接使用，但是之后想要使用通知功能，必须提示用户开启通知权限，所以首先需要注册通知，在didFinishLaunchingWithOptions中

if ([[UIDevice currentDevice].systemVersion  doubleValue]>=8.0) {
        // iOS8以后 本地通知必须注册(获取权限)
        UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeBadge | UIUserNotificationTypeSound | UIUserNotificationTypeAlert categories:nil];
        
        [application registerUserNotificationSettings:settings];
        
        
    }
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接下来我们需要添加通知触发行为，调用本地通知

1.创建本地通知实例

UILocalNotification * localNoty = [[UILocalNotification alloc]init];
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2.本地通知属性设置

   /*  本地通知触发时间 */
    localNoty.fireDate =   [NSDate dateWithTimeIntervalSinceNow:4.0];
     /*  通知提示框 */
    localNoty.alertBody = @"提示文本";
    /*  通知提示title  */
    localNoty.alertTitle = @"提示框内容";
    /* 通知提示音 */
    localNoty.soundName = UILocalNotificationDefaultSoundName;
     /* 这里接到本地通知,badge变为1 */
    localNoty.applicationIconBadgeNumber = 1;
    // 设置额外信息,appdelegate中收到通知,可以根据不同的通知的额外信息确定跳转到不同的界面
    localNoty.userInfo = @{@"notifaication":@"我是一条本地推送"};
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还有其他不常用的属性，如timeZone时区

repeatInterval 多长时间重复一次:一年,一个世纪,一天..

region区域 : 传入中心点和半径就可以设置一个区域(如果进入这个区域或者出来这个区域就发出一个通知)

regionTriggersOnce BOOL 默认为YES, 如果进入这个区域或者出来这个区域只会发出一次通知,以后就不发送了。

alertAction: 设置锁屏状态下本地通知下面的滑动来 ...字样默认为滑动来查看 hasAction: alertAction的属性是否生效

alertLaunchImage: 点击通知进入app的过程中显示图片,随便写,如果设置了(不管设置的是什么),都会加载app默认的启动图

alertTitle: 以前项目名称所在的位置的文字: 不设置显示项目名称, 在通知内容上方 soundName: 有通知时的音效，UILocalNotificationDefaultSoundName默认声音可以更改这个声音: 只要将音效导入到工程中,调用localNote.soundName = @"111.waw"

3.调用通知

[[UIApplication sharedApplication] scheduleLocalNotification:localNoty];
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通知发起后，我们需要接受本地通知，一般在AppDelegate或者其分类中添加实现方法。一般通知的接受分为三种： 1.前台接收 2.后台未杀死程序进入前台接收 3.程序已经杀死，点击通知消息启动app

针对前两中情况，app的进程仍在运行状态，在didReceiveLocalNotification方法中，添加执行代码，这里可以通过application的applicationState属性来判断当前的运行状态，一般执行的操作是app前台运行弹出提示框，后台执行点击通知进入前台直接执行。可以通过notification.userInfo来获取发送通知的userInfo。针对第三种情况，需要在didFinishLaunchingWithOptions，程序启动过程中添加执行方法

 /* launchOptions: 1.点击图标打开是空的
     2.应用间跳转是有值的
     3.杀死的应用接收到本地通知,也是有值的
     虽然说launchOptions有值,但是他们不同的key有值
 */
  if (launchOptions[UIApplicationLaunchOptionsLocalNotificationKey]) { // 如果这个key有值,代表是杀死的程序接收到本地通知跳转
   
        // 查看launchOptions内容
        UIAlertView * alert = [[UIAlertView alloc]initWithTitle:@"本地通知" message:[NSString stringWithFormat:@"%@",launchOptions] delegate:self cancelButtonTitle:@"知道了" otherButtonTitles: nil];
        [alert show];
        NSLog(@"跳转到指定页面");
    }
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UIApplicationLaunchOptionsLocalNotificationKey这个属性是启动的时候用来判断启动来源的,Keys used to access values in the launch options dictionary passed to the application:willFinishLaunchingWithOptions: and application:didFinishLaunchingWithOptions: methods of the app delegate.

具体说明如下

UIApplicationLaunchOptionsURLKey
// A key indicating that the app was launched so that it could open the specified URL.
UIApplicationLaunchOptionsSourceApplicationKey
// A key indicating that another app requested the launch of your app.
UIApplicationLaunchOptionsRemoteNotificationKey
// A key indicating that a remote notification is available for the app to process.
UIApplicationLaunchOptionsLocalNotificationKey
// A key indicating that the app was launched to handle a local notification.
Deprecated
UIApplicationLaunchOptionsAnnotationKey
// A key indicating that the URL passed to your app contained custom annotation data from the source app.
UIApplicationLaunchOptionsLocationKey
// A key indicating that the app was launched to handle an incoming location event.
UIApplicationLaunchOptionsNewsstandDownloadsKey
// A key indicating that the app was launched to process newly downloaded Newsstand assets.
UIApplicationLaunchOptionsBluetoothCentralsKey
// A key indicating that the app was relaunched to handle Bluetooth-related events.
UIApplicationLaunchOptionsBluetoothPeripheralsKey
// A key indicating that the app should continue actions associated with its Bluetooth peripheral objects.
UIApplicationLaunchOptionsShortcutItemKey
// A key indicating that the app was launched in response to the user selecting a Home screen quick action.
UIApplicationLaunchOptionsUserActivityDictionaryKey
// A key indicating that the data associated with an activity that the user wants to continue.
UIApplicationLaunchOptionsUserActivityTypeKey
// A key indicating the type of user activity that the user wants to continue.
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类似，我们可以用 NSDictionary *remoteUserInfo = launchOptions[UIApplicationLaunchOptionsRemoteNotificationKey];来处理远程通知。

需要注意一点，发送多条通知，app的角标会一直累加，所以在启动app的时候didFinishLaunchingWithOptions需要将角标清零

 [application setApplicationIconBadgeNumber:0 ];
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2.使用UserNotificaiton.framework

相关文档参照：developer.apple.com/documentati… 1.首先，我们需要将UserNotifications引入工程。然后在AppDelegate.m导入库文件 #import <UserNotifications/UserNotifications.h> 2.授权应用通知权限

 UNUserNotificationCenter* center = [UNUserNotificationCenter currentNotificationCenter];
    [center requestAuthorizationWithOptions:(UNAuthorizationOptionAlert + UNAuthorizationOptionSound)
                          completionHandler:^(BOOL granted, NSError * _Nullable error) {
                              if(!error)
                              {
                                  NSLog(@"@授权成功");
                              }
                          }];
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之前注册推送服务，ios 8 及之前使用了不同的 API，并且返回结果也不同。现在 apple 不仅统一了这个 API，而且我们可以获取到用户更加详细的设定了。

   [center getNotificationSettingsWithCompletionHandler:^(UNNotificationSettings * _Nonnull settings) {
        NSLog(@"%@",settings);
    }];
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打印结果如下： <UNNotificationSettings: 0x60400009cd40; authorizationStatus: Authorized, notificationCenterSetting: Enabled, soundSetting: Enabled, badgeSetting: Enabled, lockScreenSetting: Enabled, carPlaySetting: NotSupported, alertSetting: Enabled, alertStyle: Banner>

如果需要注册远程通知：

[[UIApplication sharedApplication] registerForRemoteNotifications];
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2.发送本地通知 UserNotificaiton发送本地通知需要使用UNNotificationRequest类，实例方法如下

+ (instancetype)requestWithIdentifier:(NSString *)identifier content:(UNNotificationContent *)content trigger:(nullable UNNotificationTrigger *)trigger;
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所以我们需要分别设定 UNNotificationContent和UNNotificationTrigger并设置一个标识符。

UNMutableNotificationContent *content = [[UNMutableNotificationContent alloc] init];
    content.title = @"this is Notifications";
    content.subtitle = @"本地通知";
    content.body = @"推送一条本地通知";
    content.badge = @1;
    content.userInfo = @{@"type":@"this is a userNotification"};
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Triggers

又是一个新的功能，有三种

UNTimeIntervalNotificationTrigger
UNCalendarNotificationTrigger
UNLocationNotificationTrigger 他们的使用方式如下：

     //8s后提醒
    UNTimeIntervalNotificationTrigger *trigger1 = [UNTimeIntervalNotificationTrigger triggerWithTimeInterval:8 repeats:NO];
    
    //每小时重复 1 次喊我喝水
    UNTimeIntervalNotificationTrigger *trigger2 = [UNTimeIntervalNotificationTrigger triggerWithTimeInterval:3600 repeats:YES];
    
    //每周一早上 8：00 提醒我给起床
    NSDateComponents *components = [[NSDateComponents alloc] init];
    components.weekday = 2;
    components.hour = 8;
    UNCalendarNotificationTrigger *trigger3 = [UNCalendarNotificationTrigger triggerWithDateMatchingComponents:components repeats:YES];
    
    //需导入定位库   #import <CoreLocation/CoreLocation.h>
    //一到距离(123.333, 123.344）点20米就喊我下车
    CLRegion *region = [[CLRegion alloc] initCircularRegionWithCenter:CLLocationCoordinate2DMake(123.333, 123.344) radius:20 identifier:@"regionidentifier"];
  
    UNLocationNotificationTrigger *trigger4 = [UNLocationNotificationTrigger triggerWithRegion:region repeats:NO];
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发出通知

NSString *requestIdentifier = @"sampleRequest";

 UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier:requestIdentifier
 content:content  trigger:trigger1];
 UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];
[center addNotificationRequest:request withCompletionHandler:^(NSError * _Nullable error) {

    }];
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3.接收本地通知并处理。与LocalNotificationL类似，有三种情况

（1）.前台接收

（2）.后台未杀死程序进入前台接收

（3）.程序已经杀死，点击通知消息启动app 需要遵循UNUserNotificationCenterDelegate代理协议方法

center.delegate = self;
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通过以下两个UNUserNotificationCenterDelegate的方法实现

 // The method will be called on the delegate only if the application is in the foreground. If the method is not implemented or the handler is not called in a timely manner then the notification will not be presented. The application can choose to have the notification presented as a sound, badge, alert and/or in the notification list. This decision should be based on whether the information in the notification is otherwise visible to the user.
- (void)userNotificationCenter:(UNUserNotificationCenter *)center willPresentNotification:(UNNotification *)notification withCompletionHandler:(void (^)(UNNotificationPresentationOptions options))completionHandler __IOS_AVAILABLE(10.0) __TVOS_AVAILABLE(10.0) __WATCHOS_AVAILABLE(3.0);

// The method will be called on the delegate when the user responded to the notification by opening the application, dismissing the notification or choosing a UNNotificationAction. The delegate must be set before the application returns from application:didFinishLaunchingWithOptions:.
- (void)userNotificationCenter:(UNUserNotificationCenter *)center didReceiveNotificationResponse:(UNNotificationResponse *)response withCompletionHandler:(void(^)(void))completionHandler __IOS_AVAILABLE(10.0) __WATCHOS_AVAILABLE(3.0) __TVOS_PROHIBITED;
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实现如下：

- (void)userNotificationCenter:(UNUserNotificationCenter *)center willPresentNotification:(UNNotification *)notification withCompletionHandler:(void (^)(UNNotificationPresentationOptions))completionHandler{
    NSLog(@"willPresentNotification:%@",notification.request.content.title);
    
    // 这里真实需要处理交互的地方
    // 获取通知所带的数据
    NSString *apsContent = [notification.request.content.userInfo objectForKey:@"type"];
    NSLog(@"%@",apsContent);
    
    
}
-(void)userNotificationCenter:(UNUserNotificationCenter *)center didReceiveNotificationResponse:(UNNotificationResponse *)response withCompletionHandler:(void (^)(void))completionHandler{
    //在没有启动本App(包括后台运行中)时，收到服务器推送消息，下拉消息会有快捷回复的按钮，点击按钮后调用的方法，根据identifier来判断点击的哪个按钮
    NSString *apsContent = [response.notification.request.content.userInfo objectForKey:@"type"];
    NSLog(@"didReceiveNotificationResponse:%@",response.notification.request.content.title);
    NSLog(@"%@",apsContent);

}
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我们可已通过removeIdentifier删除计划的推送事件：

[center removePendingNotificationRequestsWithIdentifiers:@[requestIdentifier]];
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如果我们需要更新推送，可以通过 addNotificationRequest: 方法，在 Identifier 不变的情况下重新添加，就可以刷新原有的推送。