使用很简单

导入#import <SystemConfiguration/CaptiveNetwork.h>

- (NSDictionary *)fetchNetInfo{
    
    NSArray *interfaceNames = CFBridgingRelease(CNCopySupportedInterfaces());
    NSDictionary *SSIDInfo;
    for (NSString *interfaceName in interfaceNames) {
        SSIDInfo = CFBridgingRelease(CNCopyCurrentNetworkInfo((__bridge CFStringRef)interfaceName));
        BOOL isNotEmpty = (SSIDInfo.count > 0);
        if (isNotEmpty) {
            break;
        }
    }
    return SSIDInfo;
}

SSIDInfo就是我们想要拿到的WiFi信息
{
    BSSID = "";
    SSID = ;
    SSIDDATA = <>;
}