iOS 7（非越狱）Wi-Fi RSSI 值

是否可以在未越狱的 iOS 7 设备上获取 Wi-Fi RSSI 值？我读到了 MobileWiFi.framework 和Apple80211功能，如果我理解正确的话，它们在没有越狱的情况下无法工作。

我不想在 App Store 上发布我的应用程序，因此允许使用私有 API。

我找不到原始帖子的来源，但它在运行 iOS 7.1 的被监禁设备上对我有用（在 iOS 8 上不起作用）：

#include <dlfcn.h>

-(NSDictionary *)currentWiFiInfo
{
   void *libHandle;
   void *airportHandle;

   int (*apple80211Open)(void *);
   int (*apple80211Bind)(void *, NSString *);
   int (*apple80211Close)(void *);
   int (*apple80211GetInfoCopy)(void *, CFDictionaryRef *);

   NSMutableDictionary *infoDict = [NSMutableDictionary new];
   NSDictionary * tempDictionary;
   libHandle = dlopen("/System/Library/SystemConfiguration/IPConfiguration.bundle/IPConfiguration", RTLD_LAZY);

   char *error;

   if (libHandle == NULL && (error = dlerror()) != NULL)  {
      NSLog(@"%s", error);
   }

   apple80211Open = dlsym(libHandle, "Apple80211Open");
   apple80211Bind = dlsym(libHandle, "Apple80211BindToInterface");
   apple80211Close = dlsym(libHandle, "Apple80211Close");
   apple80211GetInfoCopy = dlsym(libHandle, "Apple80211GetInfoCopy");

   apple80211Open(&airportHandle);
   apple80211Bind(airportHandle, @"en0");

   CFDictionaryRef info = NULL;

   apple80211GetInfoCopy(airportHandle, &info);

   tempDictionary = (__bridge NSDictionary *)info;

   apple80211Close(airportHandle);

   [infoDict setObject:(tempDictionary[@"RSSI"])[@"RSSI_CTL_AGR"] ? (tempDictionary[@"RSSI"])[@"RSSI_CTL_AGR"] : @"0" forKey:@"RSSI"];
   [infoDict setObject:tempDictionary[@"BSSID"] ? tempDictionary[@"BSSID"] : @"null" forKey:@"BSSID"];
   [infoDict setObject:tempDictionary[@"SSID_STR"] ? tempDictionary[@"SSID_STR"] : @"null" forKey:@"SSID"];
   [infoDict setObject:tempDictionary[@"RATE"] ? tempDictionary[@"RATE"] : @"0" forKey:@"SPEED"];

   return infoDict;
}