iPhone - 检测SIM卡可用性 [英] iPhone - Detecting SIM card availability

问题描述

我正在使用本主题中的答案。 iPhone - 如何确定运营商设备（AT& T，Verizon等？）与相同在iphone中获取操作员详细信息。虽然使用SIM卡时工作正常，但如果没有SIM卡，则返回的运营商名称是旧的运营商名称。它没有检测到SIM被移除。

I am using the answer in this topic. iPhone - how to determine carrier of the device (AT&T, Verizon, etc?) which is the same as getting operator details in iphone. Although it works fine when using a sim card, the returned carrier name if there is no SIM card is the old carrier name. It doesn't detect that the SIM is removed.

我知道这与Apple文档相矛盾，如果没有载体，CTCarrier对象应为零。但在我的应用程序中，我记录了运营商信息，它给了我最新的运营商名称，虽然没有安装SIM卡。

I know this contradicts with Apple documentation that if there is no carrier, CTCarrier object shall be nil. But in my app I logged the carrier info and it gives me the latest carrier name although no sim is installed.

推荐答案

根据文档 [CTCarrier carrierName] ：

如果配置设备对于运营商然后移除SIM卡，
此属性保留了运营商的名称。

If you configure a device for a carrier and then remove the SIM card, this property retains the name of the carrier.

就我而言知道，您无法检测SIM卡是否已安装。您只能使用 Reachability <确定是否可以使用WWAN连接/ code> 。

As far as I know, you cannot detect if the SIM card is installed. You can only determine if a WWAN connection is available using Reachability.

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