ios 获取当前wifi名称

原文地址：http://www.cnblogs.com/geweb/p/CaptiveNetwork.html

ios5之前可以通过读取配置文件获取，ios5以后苹果修改wifi列表文件位置，只有root权限才可以读取.

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

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

 

官方的API没有提供获取扫描所有wifi列表，相近功能的只有CaptiveNetwork，获取当前wifi的名称。

引用头文件<SystemConfiguration/CaptiveNetwork.h>

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/*!  @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.  */ CFArrayRef CNCopySupportedInterfaces   (void)              __OSX_AVAILABLE_STARTING(__MAC_10_8,__IPHONE_4_1);

通过CNCopySupportedInterfaces获取wifi列表，实际测试中返回数组中只有一个值，即当前连接的wifi。

 

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- (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; }