iOS-VoIP Push Notification

最近看了一篇文章，说的是微信实现收款到账语音提醒功能实现。原文章 文中提到了VoIP Push Notification，本文针对推送的种类以及如何利用推送唤醒 app 进行总结。

普通推送

远程推送和本地推送

区别网上资料太多了，简单说一下，比如今日头条，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。本地推送就是在本地设定一个时间，其实就是一个类似闹钟的功能，当到了设定的时间，就会收到一条推送，这个是和推送服务器没有关系的。

VoIP Push Notification

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。

证书设置上的区别

Xcode 上的设置

勾选功能



引入开发包



注册VoIP 推送，该方法需要在初始化 app 的时候进行调用

-(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]registerUs
b992
erNotificationSettings:notificationSettings];
}

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);
}

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];
}
}

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