我可以在Swift项目中使用Objective-C代码从NSNetService获取IP地址。是否有Swift代码可以做同样的事情(以避免有桥接头)?否则我会保持现在的方式 - 但希望它可以在Swift中完成。
-(NSString* )IPAddressesFromData:(NSNetService *)service {
for (NSData *address in [service addresses]) {
struct sockaddr_in *socketAddress = (struct sockaddr_in *) [address bytes];
//NSLog(@"Service name: %@ , ip: %s , port %i", [service name], inet_ntoa(socketAddress->sin_addr), [service port]);
NSString *retString = [NSString stringWithFormat:@"%s", inet_ntoa(socketAddress->sin_addr)];
return retString;
}
return @"Unknown";
}
更新了有效的代码:
func netServiceDidResolveAddress(sender: NSNetService) {
let theAddress = sender.addresses!.first! as NSData
var hostname = [CChar](count: Int(NI_MAXHOST), repeatedValue: 0)
if getnameinfo(UnsafePointer(theAddress.bytes), socklen_t(theAddress.length),
&hostname, socklen_t(hostname.count), nil, 0, NI_NUMERICHOST) == 0 {
if let numAddress = String.fromCString(hostname) {
print("Resolved IP address: \(numAddress)")
}
}
}
答案 0 :(得分:1)
您可以使用:
func netServiceDidResolveAddress(_ sender: NetService) {
var hostname = [CChar](repeating: 0, count: Int(NI_MAXHOST))
guard let data = sender.addresses?.first else { return }
do {
try data.withUnsafeBytes { (pointer:UnsafePointer<sockaddr>) -> Void in
guard getnameinfo(pointer, socklen_t(data.count), &hostname, socklen_t(hostname.count), nil, 0, NI_NUMERICHOST) == 0 else {
throw NSError(domain: "domain", code: 0, userInfo: ["error":"unable to get ip address"])
}
}
} catch {
print(error)
return
}
let address = String(cString:hostname)
print("\(sender.name) IP:\(address)")
}