在证书,标识符和创建证书以创建VOIP服务证书时,iOS开发者门户网站上的配置文件有一个新选项：
我在iOS上使用VOIP应用程序,之前从未看过这个选项.有谁知道这个证书是必要的,它将用于什么？
解决方法
从苹果文档：
here
here
In iOS 8 and later,voice-over-IP (VoIP) apps register for UIRemoteNotificationTypeVoIP push notifications instead of using this method. Using push notifications eliminates the need for a timeout handler to check in with the VoIP service. Instead,when a calls arrives for the user,the VoIP service sends a VoIP push notification to the user’s device. Upon receiving this notification,the device launches or wakes the app as needed so that it can handle the incoming call.
