I fixed it .
There is a file in ue4 project , It’s
name is ‘Project Name’.build.cs.
add “Sockets” and “Networking” into it
. Then project can be compile successfully .Like this :
using UnrealBuildTool;
public class HowTo_PlayerInput : ModuleRules
{
public HowTo_PlayerInput(ReadOnlyTargetRules Target) : base(Target)
{
PCHUsage = PCHUsageMode.UseExplicitOrSharedPCHs;
PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine", "InputCore",
"Sockets",//new item
"Networking"//new item
});
PrivateDependencyModuleNames.AddRange(new string[] { });
// Uncomment if you are using Slate UI
// PrivateDependencyModuleNames.AddRange(new string[] { "Slate", "SlateCore" });
// Uncomment if you are using online features
// PrivateDependencyModuleNames.Add("OnlineSubsystem");
// To include OnlineSubsystemSteam, add it to the plugins section in your uproject file with the Enabled attribute set to true
}
}