我正在将我们的游戏移植到 Unity，需要一些有关 Unity 中互联网连接检查的帮助。 官方 Unity 文档说“不要使用 Application.internetReachability。 所以我很困惑哪些代码可以在这里工作。 在任何论坛中都没有找到任何突出的解决方案。 我想检查是否打开了 wi-fi 或 GPRS，这应该适用于 iOS 和 Android。 提前致谢。
【问题讨论】：
标签： ios unity3d reachability
Application.internetReachability 是您所需要的。可能与Ping 结合使用。
这是一个例子：
using UnityEngine;
public class InternetChecker : MonoBehaviour
{
private const bool allowCarrierDataNetwork = false;
private const string pingAddress = "8.8.8.8"; // Google Public DNS server
private const float waitingTime = 2.0f;
private Ping ping;
private float pingStartTime;
public void Start()
{
bool internetPossiblyAvailable;
switch (Application.internetReachability)
{
case NetworkReachability.ReachableViaLocalAreaNetwork:
internetPossiblyAvailable = true;
break;
case NetworkReachability.ReachableViaCarrierDataNetwork:
internetPossiblyAvailable = allowCarrierDataNetwork;
break;
default:
internetPossiblyAvailable = false;
break;
}
if (!internetPossiblyAvailable)
{
InternetIsNotAvailable();
return;
}
ping = new Ping(pingAddress);
pingStartTime = Time.time;
}
public void Update()
{
if (ping != null)
{
bool stopCheck = true;
if (ping.isDone)
{
if (ping.time >= 0)
InternetAvailable();
else
InternetIsNotAvailable();
}
else if (Time.time - pingStartTime < waitingTime)
stopCheck = false;
else
InternetIsNotAvailable();
if (stopCheck)
ping = null;
}
}
private void InternetIsNotAvailable()
{
Debug.Log("No Internet :(");
}
private void InternetAvailable()
{
Debug.Log("Internet is available! ;)");
}
}
【讨论】：
In conjunction with Ping的原因
我做的是Network.TestConnection，它测试连通性，是否可以是服务器，是否可以成功使用NAT穿透。
这是他们给我们的示例代码。如果结果是ConnectionTesterStatus.Error，则很可能没有互联网访问。
var testStatus = "Testing network connection capabilities.";
var testMessage = "Test in progress";
var shouldEnableNatMessage : String = "";
var doneTesting = false;
var probingPublicIP = false;
var serverPort = 9999;
var connectionTestResult = ConnectionTesterStatus.Undetermined;
// Indicates if the useNat parameter be enabled when starting a server
var useNat = false;
function OnGUI() {
GUILayout.Label("Current Status: " + testStatus);
GUILayout.Label("Test result : " + testMessage);
GUILayout.Label(shouldEnableNatMessage);
if (!doneTesting)
TestConnection();
}
function TestConnection() {
// Start/Poll the connection test, report the results in a label and
// react to the results accordingly
connectionTestResult = Network.TestConnection();
switch (connectionTestResult) {
case ConnectionTesterStatus.Error:
testMessage = "Problem determining NAT capabilities";
doneTesting = true;
break;
case ConnectionTesterStatus.Undetermined:
testMessage = "Undetermined NAT capabilities";
doneTesting = false;
break;
case ConnectionTesterStatus.PublicIPIsConnectable:
testMessage = "Directly connectable public IP address.";
useNat = false;
doneTesting = true;
break;
// This case is a bit special as we now need to check if we can
// circumvent the blocking by using NAT punchthrough
case ConnectionTesterStatus.PublicIPPortBlocked:
testMessage = "Non-connectable public IP address (port " +
serverPort +" blocked), running a server is impossible.";
useNat = false;
// If no NAT punchthrough test has been performed on this public
// IP, force a test
if (!probingPublicIP) {
connectionTestResult = Network.TestConnectionNAT();
probingPublicIP = true;
testStatus = "Testing if blocked public IP can be circumvented";
timer = Time.time + 10;
}
// NAT punchthrough test was performed but we still get blocked
else if (Time.time > timer) {
probingPublicIP = false; // reset
useNat = true;
doneTesting = true;
}
break;
case ConnectionTesterStatus.PublicIPNoServerStarted:
testMessage = "Public IP address but server not initialized, "+
"it must be started to check server accessibility. Restart "+
"connection test when ready.";
break;
case ConnectionTesterStatus.LimitedNATPunchthroughPortRestricted:
testMessage = "Limited NAT punchthrough capabilities. Cannot "+
"connect to all types of NAT servers. Running a server "+
"is ill advised as not everyone can connect.";
useNat = true;
doneTesting = true;
break;
case ConnectionTesterStatus.LimitedNATPunchthroughSymmetric:
testMessage = "Limited NAT punchthrough capabilities. Cannot "+
"connect to all types of NAT servers. Running a server "+
"is ill advised as not everyone can connect.";
useNat = true;
doneTesting = true;
break;
case ConnectionTesterStatus.NATpunchthroughAddressRestrictedCone:
case ConnectionTesterStatus.NATpunchthroughFullCone:
testMessage = "NAT punchthrough capable. Can connect to all "+
"servers and receive connections from all clients. Enabling "+
"NAT punchthrough functionality.";
useNat = true;
doneTesting = true;
break;
default:
testMessage = "Error in test routine, got " + connectionTestResult;
}
if (doneTesting) {
if (useNat)
shouldEnableNatMessage = "When starting a server the NAT "+
"punchthrough feature should be enabled (useNat parameter)";
else
shouldEnableNatMessage = "NAT punchthrough not needed";
testStatus = "Done testing";
}
}
【讨论】：
这是一个简单的解决方案，我已经在使用它进行 Internet 检查。它适用于IOS和Android。我知道它可能需要改进，但这里是：
public static bool InternetStatus ()
{
if (Application.internetReachability != NetworkReachability.NotReachable)
{
return true;
}else{
return false;
}
}
【讨论】：