CTTelephonyNetworkInfo

Use the CTTelephonyNetworkInfo class to respond to changes in the user’s cellular service provider. This occurs, for example, if a user swaps the device’s SIM card with one from another provider, while your application is running. This class also gives you access to the CTCarrier object, which contains information about the user’s home cellular service provider.

 

使用CTTelephonyNetworkInfo类来响应用户手机服务商的变化。例如，在你的应用正在运行的时候，如果你将设备的sim卡更改成另外一个营运商的，就会发生类似改变事件。这个类还给予你访问CTCarrier对象的权限，该对象包含用户手机服务提供商的信息。