IOS12 获取wifi

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-(NSDictionary *)wifiInfo {
    NSArray *ifs = (__bridge_transfer id)CNCopySupportedInterfaces();
    NSLog(@"interfaces:%@",ifs);
    NSDictionary *info = nil;
    for (NSString *ifname in ifs) {
        info = (__bridge_transfer NSDictionary *)CNCopyCurrentNetworkInfo((__bridge CFStringRef)ifname);
        NSLog(@"%@ => %@",ifname,info);
    }
    return info;
}

1、appid中勾选Access WiFi Infomation
2、xCode中Capabilities中，激活Access WiFi Infomation项