ios 擷取當前wifi名稱

ios5之前可以通過讀取設定檔擷取，ios5以後蘋果修改wifi列表檔案位置，只有root許可權才可以讀取.

ios4:/System/Library/SystemConfiguration/WiFiManager.bundle/WiFiManager

ios5:/System/Library/SystemConfiguration/IPConfiguration.bundle/IPConfiguration

 

官方的API沒有提供擷取掃描所有wifi列表，相近功能的只有CaptiveNetwork，擷取當前wifi的名稱。

引用標頭檔<SystemConfiguration/CaptiveNetwork.h>

/*! @function CNCopySupportedInterfaces @discussion copies a list of all interfaces CaptiveNetworkSupport is monitoring. @result An array of CFStringRef- BSD interface names. Returns NULL if an error was encountered. You MUST release the returned value. */CFArrayRefCNCopySupportedInterfaces(void)__OSX_AVAILABLE_STARTING(__MAC_10_8,__IPHONE_4_1);

通過CNCopySupportedInterfaces擷取wifi列表，實際測試中返回數組中只有一個值，即當前串連的wifi。

 

- (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;}