iOS 推送回调方法整理

不考虑iOS10以下。

1. APP在运行中收到通知的处理方法：
   执行UIApplicationDelegate代理方法

- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler
{
    // 1、应用正处在前台状态下，不会收到推送消息，这里创建一个UIAlertController来接受消息
    if (application.applicationState == UIApplicationStateActive) {

        UIAlertController *alertvc = [UIAlertController alertControllerWithTitle:@"新消息" message:userInfo[@"aps"][@"alert"][@"body"] preferredStyle:UIAlertControllerStyleAlert];
        UIAlertAction* updateAction = [UIAlertAction actionWithTitle:@"查看" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
           
        }];
        UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];
        [alertvc addAction:cancelAction];
        [alertvc addAction:updateAction];
        alertvc.modalPresentationStyle = 0;
        [self.window.rootViewController presentViewController:alertvc animated:YES completion:nil];
        
    } else if (application.applicationState == UIApplicationStateInactive) {

    //2. 处于后台运行状态时
        [JPUSHService handleRemoteNotification:userInfo];
    //但实际发现并不走这里
        
    }
}

2. APP在杀死或在后台运行时收到通知的处理方法：
   执行UNUserNotificationCenterDelegate代理方法

-(void)userNotificationCenter:(UNUserNotificationCenter *)center didReceiveNotificationResponse:(UNNotificationResponse *)response withCompletionHandler:(void (^)(void))completionHandler
{
    NSString *userAction = response.actionIdentifier;
   
    if ([userAction isEqualToString:UNNotificationDismissActionIdentifier]) {
        [JPUSHService resetBadge];
        // 用户删除了通知消息，不做操作
     }
    if ([userAction isEqualToString:UNNotificationDefaultActionIdentifier]) {
         //APP在杀死或在后台运行时都会回调这里，在这里可以跳转相应界面
        });
    }
    completionHandler();
}