iOS本地推送笔记

本地推送(使用UserNotifications框架实现)

一、从APNs注册device token：

在app启动流程中调用的didFinishLaunchingWithOptions方法中调用registerForRemoteNotification方法

registerForRemoteNotification方法判断iOS系统版本，调用requestAuthorizationWithOptions

代码如下：

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

    // Override point for customization after application launch.

    [self registerNotification];

    return YES;

}

- (void)registerNotification {

      UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];

      [center requestAuthorizationWithOptions:(UNAuthorizationOptionAlert + UNAuthorizationOptionSound) completionHandler:^(BOOL granted, NSError * _Nullable error) {

      }];

}

方法请求通知授权

二、添加本地通知：

iOS版本10以上：UNUserNotificationCenter创建推送通知中心，声明UNMutableNotificationContent对象

创建通知内容，然后设置本地通知的触发条件，可以用NSTimeInterval设置多久后发送，然后使用UNTimeIntervalNotificationTrigger

触发定时发送，此外还有指定日期时间条件的触发方法UNCalendarNotificationTrigger，以及根据地理区域触发的UNLocationNotificationTrigger方法，[UNNotificationRequest requestWithIdentifier:identifier（NSString对象，这个推送的标签）content:content trigger:trigger]创建一个创建本地推送的请求，addNotificationRequest:request

发送该请求，请求成功则创建成功

iOS版本10以下：UILocalNotification创建本地推送，[[UIApplication sharedApplication]scheduleLocalNotification:notif]使用UIApplication单例添加该推送

代码：

-(void)addLocalNoticeWithID:(NSString*)identifier {

        UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];

        UNMutableNotificationContent *content = [[UNMutableNotificationContent alloc] init];

        content.title=@"Local Push Test";

        content.subtitle=@"Subtitle: Damn!";

        content.body = @"Do you have freestyle? Skrrr~~~";

        content.sound = [UNNotificationSound defaultSound];*

        content.badge= @1;

        NSTimeInterval time = [[NSDate dateWithTimeIntervalSinceNow:10] timeIntervalSinceNow];

        UNTimeIntervalNotificationTrigger *trigger = [UNTimeIntervalNotificationTrigger triggerWithTimeInterval:time repeats:**NO**];

        UNNotificationRequest *request = [UNNotificationRequestrequestWithIdentifier:identifier content:content trigger:trigger];

        [center addNotificationRequest:request withCompletionHandler:^(NSError *_Nullable error) {

            NSLog(@"Local Push was successfully added!");

        }];

}

三、移除某本地推送：

iOS版本10以上：UNUserNotificationCenter获取推送通知中心，getPendingNotificationRequestsWithCompletionHandler方法获取当前所有本地推送的请求，如果存在我们希望移除的identifier则调removePendingNotificationRequestsWithIdentifiers方法删除。removeAllPendingNotificationRequests方法移除全部本地推送

iOS版本10以下：[[UIApplication sharedApplication]scheduledLocalNotifications]获取所有已经添加的本地推送的数组，遍历数组，找到相应的identifier的推送后使用cancelLocalNotification:localNotification方法移除。cancelAllLocalNotifications移除全部本地推送

- (void)removeOneNotificationWithID:(NSString*)noticeId {

        UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];

        [center getPendingNotificationRequestsWithCompletionHandler:^(NSArray * _Nonnull requests) {

            for(UNNotificationRequest *req in requests){

                NSLog(@"The exist IDs:%@\n",req.identifier);

            }

            NSLog(@"Remove currentID:%@",noticeId);

        }];

        [center removePendingNotificationRequestsWithIdentifiers:@[noticeId]];

}

四、检查授权情况：

iOS版本10以上：UNUserNotificationCenter获取推送通知中心，getNotificationSettingsWithCompletionHandler获取当前推送设置，若settings.notificationCenterSetting == UNNotificationSettingEnabled则说明推送功能已开启，否则就是关闭状态

iOS版本10以下：直接通过[UIApplication sharedApplication]currentUserNotificationSettings].types获取通知开关状态

- (void)checkUserNotificationEnable {

        __block BOOL isOn =NO;

        UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];

        [center getNotificationSettingsWithCompletionHandler:^(UNNotificationSettings * _Nonnull settings) {

            if(settings.notificationCenterSetting==UNNotificationSettingEnabled) {

                isOn =YES;

                NSLog(@"Turned on the notify");

            }else{

                isOn =NO;

                NSLog(@"Turned off the notify");

                if(self.delegate&& [self.delegaterespondsToSelector:@selector(showAlertView)]) {

                    [self.delegate showAlertView];

                }

            }

        }];

}

参考：https://www.jianshu.com/p/0f0dd782fdd5 UserNotifications框架详解
https://www.jianshu.com/p/9b1fa25a0712 iOS 本地推送(Local Push)