获取WIFI的SSID和本机IP

1.获取WIFI的SSID

引入库

#import <SystemConfiguration/CaptiveNetwork.h>
.....
.....
// WIFI的名字
+ (NSString *)getWifiSSID
{
    NSArray *ifs = (__bridge id)CNCopySupportedInterfaces();
    id info = nil;
    for (NSString *ifnam in ifs) {
        info = (__bridge id)CNCopyCurrentNetworkInfo((__bridge CFStringRef)ifnam);
        if (info && [info count]) {
            break;
        }
    }
    NSDictionary *dctySSID = (NSDictionary *)info;
    NSString *ssid = [[dctySSID objectForKey:@"SSID"] lowercaseString];
    return ssid;
}

2.获取本机IP

#import <ifaddrs.h>
#import <arpa/inet.h>
.....
.....

// Get IP Address
- (NSString *)getIPAddress {
    NSString *address = @"error";
    struct ifaddrs *interfaces = NULL;
    struct ifaddrs *temp_addr = NULL;
    int success = 0;
    // retrieve the current interfaces - returns 0 on success
    success = getifaddrs(&interfaces);
    if (success == 0) {
        // Loop through linked list of interfaces
        temp_addr = interfaces;
        while(temp_addr != NULL) {
            if(temp_addr->ifa_addr->sa_family == AF_INET) {
                // Check if interface is en0 which is the wifi connection on the iPhone
                if([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"]) {
                    // Get NSString from C String
                    address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];
                }
            }
            temp_addr = temp_addr->ifa_next;
        }
    }
    // Free memory
    freeifaddrs(interfaces);
    return address;
}