ios voip 推送

1. 什么是voip推送和普通的ios推送有什么区别呢？
   普通推送分为：远程推送和本地推送，区别网上资料太多了，简单说一下，比如网易新闻，有什么大的新闻会在手机端接收到推送，这个就是远程推送，是把相关信息推送到苹果推送服务器-APNS，太简单了，不说了！

重点说下：voip的重点功能。
就是打视频或者语音电话的时候推送功能，一个典型的应用场景，A用户拨打B用户视频或者语音电话，A拨打，B铃声响起，此时A挂断，B铃声消失，就相当于控制对方手机一样。国外的语音视频电话都是采用voip push,比如whats app，line等语音视频通讯软件。

曾经有人说普通推送可以做到以上功能，我可以明确的给出回复：普通推送是无法做到的，必须用voip push才能做到。

注意事项：
1、证书的制作过程中也需要选中voip认证。

2、在xcode开发中也需要进行相关的设置，设置如下：

3、引入开发包

xcode端代码如下：

1、首先注册为voip推送：

-(void)registerVoipNotifications{
    
    PKPushRegistry * voipRegistry = [[PKPushRegistry alloc]initWithQueue:dispatch_get_main_queue()];

    voipRegistry.delegate = self;
    voipRegistry.desiredPushTypes = [NSSet setWithObject:PKPushTypeVoIP];

    UIUserNotificationType types = (UIUserNotificationTypeBadge | UIUserNotificationTypeSound | UIUserNotificationTypeAlert);
    
    UIUserNotificationSettings * notificationSettings = [UIUserNotificationSettings settingsForTypes:types categories:nil];

    [[UIApplication sharedApplication]registerUserNotificationSettings:notificationSettings];
}

在应用初始化方法中调用：

 [self registerVoipNotifications];

2、获取token，用于发送到服务器端，服务器端发送推送消息时，会发送这个token到APNS服务器，APNS通过这个token定位到手机和对应的应用，进而推送消息。

- (void)pushRegistry:(PKPushRegistry *)registry didUpdatePushCredentials:(PKPushCredentials *)credentials forType:(NSString *)type{
    
    NSString *str = [NSString stringWithFormat:@"%@",credentials.token];
    NSString *_tokenStr = [[[str stringByReplacingOccurrencesOfString:@"<" withString:@""]
                            stringByReplacingOccurrencesOfString:@">" withString:@""] stringByReplacingOccurrencesOfString:@" " withString:@""];
    NSLog(@"device_token is %@" , _tokenStr);
}

3、下面是最重要的一步：就是对推送过来的消息进行解析，可以在推送的时候设置标记，下面的代码是获取到标志以后，根据标志命令调用不同的方法进行处理，进而实现功能，注意这里接收到消息定义时，如果传过来的命令是call就创建一个本地推送，提示某人正在呼叫你，如果传过来的命令为cancel，就取消命令

- (void)pushRegistry:(PKPushRegistry *)registry didReceiveIncomingPushWithPayload:(PKPushPayload *)payload forType:(NSString *)type{
    
    UIUserNotificationType theType = [UIApplication sharedApplication].currentUserNotificationSettings.types;
    
    if (theType == UIUserNotificationTypeNone)
    {
        UIUserNotificationSettings *userNotifySetting = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeBadge | UIUserNotificationTypeSound | UIUserNotificationTypeAlert categories:nil];
        [[UIApplication sharedApplication] registerUserNotificationSettings:userNotifySetting];
    }
    
    NSDictionary * dic = payload.dictionaryPayload;
    
    NSLog(@"dic  %@",dic);
    
    if ([dic[@"cmd"] isEqualToString:@"call"]) {
        UILocalNotification *backgroudMsg = [[UILocalNotification alloc] init];
        backgroudMsg.alertBody= @"You receive a new call";
        backgroudMsg.soundName = @"ring.caf";
        backgroudMsg.applicationIconBadgeNumber = [[UIApplication sharedApplication]applicationIconBadgeNumber] + 1;
        [[UIApplication sharedApplication] presentLocalNotificationNow:backgroudMsg];
    }else if(([dic[@"cmd"] isEqualToString:@"cancel"]){
        
        [[UIApplication sharedApplication] cancelAllLocalNotifications];
        
        UILocalNotification * wei = [[UILocalNotification alloc] init];
        wei.alertBody= [NSString stringWithFormat:@"%ld 个未接来电",[[UIApplication sharedApplication]applicationIconBadgeNumber]];
        wei.applicationIconBadgeNumber = [[UIApplication sharedApplication]applicationIconBadgeNumber];
        [[UIApplication sharedApplication] presentLocalNotificationNow:wei];
    }
}

4、注意当进入应用时，角标清除：

- (void)applicationDidBecomeActive:(UIApplication *)application {
    
    [UIApplication sharedApplication].applicationIconBadgeNumber = 0;

}

以上是IOS端代码

下面是服务器端发送：
服务器端代码如下：
1、获取推送服务这个是用的开源的java推送框架，github有源码：

/** * get push service
 * @return
 * @throws FileNotFoundException
 */

public ApnsService  getPushService(Long accountId) throws FileNotFoundException {
    String certPath = getCertPath(accountId);    
logger.debug("cert path: "+certPath);  
  ApnsService service =          
  APNS.newService()               
     .withCert(certPath, "123456")       
             .withProductionDestination()          
          .build();   // service.testConnection();  
  return service;
}

2、推送命令包含在推送字段中

public  void  pushNotificationTest(Long accountId,String cloudpId,String content) throws Exception{ 

   Relation  relation = new Relation();   
 relation.setUserId(cloudpId);    
relation.setAccountId(accountId);   
// String deviceToken = queryDeviceToken(relation);    
//logger.debug("deviceToken:"+deviceToken);   
 String deviceToken = handleDeviceToken("5e11eefc6f8b427b6646bcaf5320a5e714b121859f21b0ee78d88d3f411ac69b6");  
  ApnsService  service = getPushServiceTest(accountId); 
   try{        
String call = APNS.newPayload().customField("cmd","call").build();        String cancel = APNS.newPayload().customField("cmd","cancel").build();   
    service.push(deviceToken, call); 
     //  service.push(deviceToken, cancel);  
  }catch (Exception e){    
    logger.error("push throw Exception: " +e.getMessage());       
 throw new Exception(e);   
 }finally {      
  if (service != null){       
     service.stop();       
 }  
  }
}

参考一
java 推送
stackoverflow