#import <CoreTelephony/CTTelephonyNetworkInfo.h>

#import <CoreTelephony/CTCarrier.h>  

    -(void)networktype{

        NSArray *subviews = [[[[UIApplication sharedApplication] valueForKey:@"statusBar"] valueForKey:@"foregroundView"]subviews];

        NSNumber *dataNetworkItemView = nil;  

        for (id subview in subviews) {

            if([subview isKindOfClass:[NSClassFromString(@"UIStatusBarDataNetworkItemView") class]]) {

                dataNetworkItemView = subview;

                break;

            }

        }  

        switch ([[dataNetworkItemView valueForKey:@"dataNetworkType"]integerValue]) {

            case :

                NSLog(@"No wifi or cellular");

                infoLabel.text=@"无服务";

                break;  

            case :

                NSLog(@"2G");

                infoLabel.text=@"2G";

                break;  

            case :

                NSLog(@"3G");

                infoLabel.text=@"3G";

                break;  

            case :

                NSLog(@"4G");

                infoLabel.text=@"4G";

                break;  

            case :

                NSLog(@"LTE");

                infoLabel.text=@"LTE";

                break;  

            case :

                NSLog(@"Wifi");

                infoLabel.text=@"Wifi";

                break;  

            default:

                break;

        }}  

+ (BOOL)isInChina{

    CTTelephonyNetworkInfo *telephonyInfo = [[CTTelephonyNetworkInfo alloc] init];

    CTCarrier *carrier = [telephonyInfo subscriberCellularProvider];

    //NSString *currentCountry = [carrier carrierName];

    NSLog(@"[carrier carrierName]==%@,[carrier mobileCountryCode]==%@,[carrier mobileNetworkCode]==%@,[carrier isoCountryCode]==%@,[carrier allowsVOIP]==%d",[carrier carrierName],[carrier mobileCountryCode],[carrier mobileNetworkCode],[carrier isoCountryCode],[carrier allowsVOIP]);

    if ([[carrier mobileCountryCode] isEqualToString:@""]) {

        return YES;

    }else{

        return NO;

    }

}