iOS 获取已连接的wifi信息

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首先需要 #import <SystemConfiguration/CaptiveNetwork.h>

+ (id)fetchSSIDInfo{    NSArray *ifs = (id)CNCopySupportedInterfaces();    NSLog(@"%s: Supported interfaces: %@", __func__, ifs);    id info = nil;    for (NSString *ifnam in ifs) {        info = (id)CNCopyCurrentNetworkInfo((CFStringRef)ifnam);        NSLog(@"%@ => %@", ifnam, info);        if (info && [info count]) { break; }        [info release];    }    [ifs release];    return [info autorelease];}

ARC 版本：

+ (id)fetchSSIDInfo {    NSArray *ifs = (__bridge_transfer id)CNCopySupportedInterfaces();    NSLog(@"%s: Supported interfaces: %@", __func__, ifs);    id info = nil;    for (NSString *ifnam in ifs) {        info = (__bridge_transfer id)CNCopyCurrentNetworkInfo((__bridge CFStringRef)ifnam);        NSLog(@"%@ => %@", ifnam, info);        if (info && [info count]) { break; }    }    return info;}