在ios中检测sim卡检测的可能方法？ [英] Possible way to detect sim card detection in ios?

问题描述

我有一个能够发送消息的iPhone应用程序。我想在iphone中没有SIM卡时提醒用户。所以我尝试了以下三个功能来检查sim卡的可用性

I have a iphone app that has the capability to send messages. I want to alert user when sim card is not available in iphone. So i tried below three function to check sim card availabilty

Class messageClass = (NSClassFromString(@"MFMessageComposeViewController"));
if([messageClass canSendText]){
    // Sim available
    NSLog(@"Sim available");
}
else{
    //Sim not available
    NSLog(@"Sim not available");
}

if([MFMessageComposeViewController canSendText]){
    // Sim available
    NSLog(@"Sim available");
}
else{
    //Sim not available
    NSLog(@"Sim not available");
}

if([[UIDevice currentDevice].model isEqualToString:@"iPhone"])
{
    if ([[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:@"tel:123456"]])
    {
        NSLog(@"Sim available");
    }
    else
    {
        NSLog(@"Sim not available");
    }
}

我已经检查了我的iphone没有SIM卡，它总是返回@Sim available。但是，当我打开默认的消息应用程序并尝试发送短信时，它会显示警告未安装SIM卡...此消息应用程序如何检测SIM卡可用性？

I have checked my iphone without sim, it always return @"Sim available". But when i open default "Messages" app and try to send sms it says alert "No SIM Card Installed"... How this message app can detect sim card availabilty?

推荐答案

通过以下代码，您可以获得sim卡详细信息，如carriername，mobilecountrycode，isocountrycode，mobilenetworkcode。在ios 6中，所有内容都被保留。如果您的SIM卡被删除，它也会保留旧的细节。所以这个想法不会有用但是在ios 7中只保留了运营商名称并且保留了更改，因此可以使用以下代码

By the below code you can get the sim card details like carriername,mobilecountrycode,isocountrycode,mobilenetworkcode.In the ios 6 all are retained.So if your sim card is removed also it will retain the old details.So there this idea wont be useful but in ios 7 only carriername is retained and remaining are changed so the below code can be used

CTTelephonyNetworkInfo* info = [[CTTelephonyNetworkInfo alloc] init];
CTCarrier* carrier = info.subscriberCellularProvider;
NSString *mobileCountryCode = carrier.mobileCountryCode;
NSString *carrierName = carrier.carrierName;
NSString *isoCountryCode = carrier.isoCountryCode;
NSString *mobileNetworkCode = carrier.mobileNetworkCode

// Try this to track CTCarrier changes 
info.subscriberCellularProviderDidUpdateNotifier = ^(CTCarrier* inCTCarrier) {
        dispatch_async(dispatch_get_main_queue(), ^{
            NSLog(@"User did change SIM");
        });
};

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