之前写过通过statusBar来获取网络状态 以及运营商 信号强度等等。

[iOS]判断IPv4和IPv6并获取地址，以及获取运营商、信号强度

然后iOS13更新出来之后 statusBar这种方式就会直接crash了，要通过statusBar来获取的话就需要使用系统提供的statusBarManager。

不想去研究statusBarManager可以使用SystemConfiguration/SCNetworkReachability.h中的网络相关功能来获取

- (NSString *)deviceNetworkingType
{
    NSString *strNetworkInfo = @"No Network";
    struct sockaddr_storage zeroAddress;
    bzero(&zeroAddress,sizeof(zeroAddress)); zeroAddress.ss_len = sizeof(zeroAddress);
    zeroAddress.ss_family = AF_INET;
    // Recover reachability flags
    SCNetworkReachabilityRef defaultRouteReachability = SCNetworkReachabilityCreateWithAddress(NULL,(struct sockaddr *)&zeroAddress);
    SCNetworkReachabilityFlags flags;
    BOOL didRetrieveFlags = SCNetworkReachabilityGetFlags(defaultRouteReachability,&flags);
    CFRelease(defaultRouteReachability);
    if(!didRetrieveFlags){ return strNetworkInfo;}
    BOOL isReachable = ((flags & kSCNetworkFlagsReachable)!=0);
    BOOL needsConnection = ((flags & kSCNetworkFlagsConnectionRequired)!=0);
    if(!isReachable || needsConnection) {return strNetworkInfo;}
    if((flags & kSCNetworkReachabilityFlagsConnectionRequired)== 0){
        strNetworkInfo = @"WIFI";
    }
    if(((flags & kSCNetworkReachabilityFlagsConnectionOnDemand ) != 0) ||(flags & kSCNetworkReachabilityFlagsConnectionOnTraffic) != 0) {
        if ((flags & kSCNetworkReachabilityFlagsInterventionRequired) == 0){
            strNetworkInfo = @"WIFI";
        }
    }
    if ((flags & kSCNetworkReachabilityFlagsIsWWAN) ==kSCNetworkReachabilityFlagsIsWWAN) {
        if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0) {
            CTTelephonyNetworkInfo * info = [[CTTelephonyNetworkInfo alloc] init];
            NSString *currentRadioAccessTechnology = info.currentRadioAccessTechnology;
            if (currentRadioAccessTechnology) {
                if ([currentRadioAccessTechnology isEqualToString:CTRadioAccessTechnologyLTE]) {
                    strNetworkInfo =@"4G";
                } else if ([currentRadioAccessTechnology isEqualToString:CTRadioAccessTechnologyEdge] || [currentRadioAccessTechnology isEqualToString:CTRadioAccessTechnologyGPRS]) {
                    strNetworkInfo =@"2G";
                } else {
                    strNetworkInfo =@"3G";
                }
            }
        } else {
            if((flags & kSCNetworkReachabilityFlagsReachable) == kSCNetworkReachabilityFlagsReachable) {
                if ((flags & kSCNetworkReachabilityFlagsTransientConnection) == kSCNetworkReachabilityFlagsTransientConnection) {
                    if((flags & kSCNetworkReachabilityFlagsConnectionRequired) == kSCNetworkReachabilityFlagsConnectionRequired) {
                        strNetworkInfo =@"2G";
                    } else {
                        strNetworkInfo =@"3G";
                    }
                }
            }
        }
    }
    return strNetworkInfo;
}