/*     iphone获取sim卡信息     1.加入一个Framework(CoreTelephony.framework).     2.引入头文件    #import <CoreTelephony/CTTelephonyNetworkInfo.h>    #import <CoreTelephony/CTCarrier.h>     3.初始化           */    //-----------------------------------    具体demo    //-----------------------------------    #import <UIKit/UIKit.h>    #import <CoreTelephony/CTTelephonyNetworkInfo.h>    #import <CoreTelephony/CTCarrier.h>    @interface RootViewController : UITableViewController    {        //声明变量        CTTelephonyNetworkInfo *networkInfo;    }    @end    @implementation RootViewController    - (void)viewDidLoad    {        [super viewDidLoad];        self.navigationItem.prompt = @"CTTelephonyNetworkInfo";        self.navigationItem.title = @"CTCarrier";               //初始化        networkInfo = [[CTTelephonyNetworkInfo alloc] init];        //当sim卡更换时弹出此窗口        networkInfo.subscriberCellularProviderDidUpdateNotifier = ^(CTCarrier *carrier){            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:nil message:@"Sim card changed" delegate:nil cancelButtonTitle:@"Dismiss" otherButtonTitles:nil];            [alert show];                    };                }    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath    {        //获取sim卡信息        CTCarrier *carrier = networkInfo.subscriberCellularProvider;        static NSString *CellIdentifier = @"Cell";        UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];        if (cell == nil) {            cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];        }                switch (indexPath.row) {            case 0://供应商名称（中国联通 中国移动）                cell.textLabel.text = @"carrierName";                cell.detailTextLabel.text = carrier.carrierName;                break;            case 1://所在国家编号                cell.textLabel.text = @"mobileCountryCode";                cell.detailTextLabel.text = carrier.mobileCountryCode;                break;            case 2://供应商网络编号                cell.textLabel.text = @"mobileNetworkCode";                cell.detailTextLabel.text = carrier.mobileNetworkCode;                break;            case 3:                cell.textLabel.text = @"isoCountryCode";                cell.detailTextLabel.text = carrier.isoCountryCode;                break;            case 4://是否允许voip                cell.textLabel.text = @"allowsVOIP";                cell.detailTextLabel.text = carrier.allowsVOIP?@"YES":@"NO";                break;                            default:                break;        }                return cell;    }