NSString* phoneVersion = [[UIDevice currentDevice] systemVersion];
  CGFloat version = [phoneVersion floatValue];
  // 如果是iOS13 未開啟地理位置權(quán)限 需要提示一下
  if ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusNotDetermined && version >= 13) {
    self.locationManager = [[CLLocationManager alloc] init];
    [self.locationManager requestWhenInUseAuthorization];
  }

#import <SystemConfiguration/CaptiveNetwork.h>

- (NSString *)currentWifiSSID
{
  NSString *ssid = nil;
  NSArray *ifs = (__bridge  id)CNCopySupportedInterfaces();
  for (NSString *ifname in ifs) {
    NSDictionary *info = (__bridge id)CNCopyCurrentNetworkInfo((__bridge CFStringRef)ifname);
    if (info[@"SSIDD"])
    {
      ssid = info[@"SSID"];
    }
  }
  return ssid;
}