iOS 5G網絡判斷

iOS中如何判斷5G網絡呢？Xcode12.1中CTRadioAccessTechnologyNRNSA和CTRadioAccessTechnologyNR

NR是New Radio的縮寫，新無線（5G）的意思，NRNSA表示5G NR的非獨立網(NSA )模式：

https://zh.wikipedia.org/wiki/5G%E6%96%B0%E6%97%A0%E7%BA%BF

使用了Reachability進行網絡判斷：

+ (NSString *)networkStatus{
    Reachability *reachability   = [Reachability reachabilityWithHostName:@"www.apple.com"];
    NetworkStatus internetStatus = [reachability currentReachabilityStatus];
    NSString *net = @"WIFI";
    switch (internetStatus) {
        case ReachableViaWiFi:
            net = @"WIFI";
            break;
        case ReachableViaWWAN:
            net = [self getNetType];   //判斷具體類型
            break;
        case NotReachable:
            net = @"目前無網路連接配接";
        default:
            break;
    }
    return net;
}

+ (NSString *)getNetType
{
    CTTelephonyNetworkInfo *info = [[CTTelephonyNetworkInfo alloc] init];
    NSString *currentStatus = info.currentRadioAccessTechnology;
    NSString *currentNet = @"5G";
    
    if ([currentStatus isEqualToString:CTRadioAccessTechnologyGPRS]) {
        currentNet = @"GPRS";
    }else if ([currentStatus isEqualToString:CTRadioAccessTechnologyEdge]) {
        currentNet = @"2.75G EDGE";
    }else if ([currentStatus isEqualToString:CTRadioAccessTechnologyWCDMA]){
        currentNet = @"3G";
    }else if ([currentStatus isEqualToString:CTRadioAccessTechnologyHSDPA]){
        currentNet = @"3.5G HSDPA";
    }else if ([currentStatus isEqualToString:CTRadioAccessTechnologyHSUPA]){
        currentNet = @"3.5G HSUPA";
    }else if ([currentStatus isEqualToString:CTRadioAccessTechnologyCDMA1x]){
        currentNet = @"2G";
    }else if ([currentStatus isEqualToString:CTRadioAccessTechnologyCDMAEVDORev0]){
        currentNet = @"3G";
    }else if ([currentStatus isEqualToString:CTRadioAccessTechnologyCDMAEVDORevA]){
        currentNet = @"3G";
    }else if ([currentStatus isEqualToString:CTRadioAccessTechnologyCDMAEVDORevB]){
        currentNet = @"3G";
    }else if ([currentStatus isEqualToString:CTRadioAccessTechnologyeHRPD]){
        currentNet = @"HRPD";
    }else if ([currentStatus isEqualToString:CTRadioAccessTechnologyLTE]){
        currentNet = @"4G";
    }else if (@available(iOS 14.0, *)) {
        if ([currentStatus isEqualToString:CTRadioAccessTechnologyNRNSA]){
            currentNet = @"5G NSA";
        }else if ([currentStatus isEqualToString:CTRadioAccessTechnologyNR]){
            currentNet = @"5G";
        }
    }
    return currentNet;
}