iphone - 如何以编程方式获取iphone的IP地址

Question

这个问题在这里已经有了答案:

How to get my IP address programmatically on iOS/macOS? (10 个回答)

关闭 9年前。

我通过使用 Mongoose 在 iphone 中启动并运行了一个网络服务器.但问题是如何获取我的 iphone/ipad 的 IP 地址，让用户知道他们可以在哪里访问服务器。我发现 [NSHostaddress] 可以完成这项工作，但我正在为应用商店开发，这是未记录的方法。

Answer 1

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

// Get the INTERNAL 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;

} 

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