iOS 获取客户端的IP地址

//导入头文件

#import <ifaddrs.h>

#import <arpa/inet.h>

//方法调用

- (NSString*)getIPAddress {

NSString*address =@"error";

structifaddrs*interfaces =NULL;

structifaddrs*temp_addr =NULL;

intsuccess =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([[NSStringstringWithUTF8String:temp_addr->ifa_name]isEqualToString:@"en0"]) {

// Get NSString from C String

address = [NSStringstringWithUTF8String:inet_ntoa(((structsockaddr_in*)temp_addr->ifa_addr)->sin_addr)];

}

}

temp_addr = temp_addr->ifa_next;

}

}

// Free memory

freeifaddrs(interfaces);

returnaddress;

}