UE4C++使用udp接受数据详细案例
时间: 2023-06-26 20:07:31 浏览: 129
以下是一个简单的基于UE4C++的UDP接收数据的示例:
1. 首先,在您的项目中创建一个新的C++类,以便您可以编写处理UDP数据的代码。例如,我们可以创建一个名为`UDPReceiver`的类。
2. 在`UDPReceiver.h`文件中,添加以下代码:
```cpp
#include "CoreMinimal.h"
#include "UObject/NoExportTypes.h"
#include "UDPReceiver.generated.h"
/**
*
*/
UCLASS()
class YOURPROJECT_API UUDPReceiver : public UObject
{
GENERATED_BODY()
public:
UUDPReceiver();
virtual void BeginDestroy() override;
UFUNCTION(BlueprintCallable, Category = "UDP")
bool Connect(FString IP, int32 Port);
UFUNCTION(BlueprintCallable, Category = "UDP")
bool Receive(FString& Data);
private:
void* ReceiverSocket;
};
```
3. 在`UDPReceiver.cpp`文件中,添加以下代码:
```cpp
#include "UDPReceiver.h"
#include "Networking.h"
UUDPReceiver::UUDPReceiver()
{
ReceiverSocket = nullptr;
}
void UUDPReceiver::BeginDestroy()
{
if (ReceiverSocket != nullptr)
{
ISocketSubsystem::Get(PLATFORM_SOCKETSUBSYSTEM)->DestroySocket(ReceiverSocket);
ReceiverSocket = nullptr;
}
Super::BeginDestroy();
}
bool UUDPReceiver::Connect(FString IP, int32 Port)
{
if (ReceiverSocket != nullptr)
{
UE_LOG(LogTemp, Warning, TEXT("Socket already exists"));
return false;
}
bool bIsValid;
FIPv4Address::Parse(IP, bIsValid);
if (!bIsValid)
{
UE_LOG(LogTemp, Warning, TEXT("Invalid IP address"));
return false;
}
FIPv4Endpoint Endpoint(FIPv4Address::Any, Port);
ReceiverSocket = FUdpSocketBuilder(TEXT("UDP Receiver"))
.AsReusable()
.BoundToEndpoint(Endpoint)
.Build();
return true;
}
bool UUDPReceiver::Receive(FString& Data)
{
if (ReceiverSocket == nullptr)
{
UE_LOG(LogTemp, Warning, TEXT("Socket does not exist"));
return false;
}
TArray<uint8> ReceivedData;
int32 BytesRead = 0;
bool bReadSuccess = ReceiverSocket->Recv(ReceivedData, BytesRead);
if (bReadSuccess && BytesRead > 0)
{
Data = FString(UTF8_TO_TCHAR(reinterpret_cast<const char*>(ReceivedData.GetData())));
return true;
}
return false;
}
```
4. 现在,您可以在UE4蓝图中使用`UDPReceiver`类。在蓝图中,创建一个新的变量,类型为`UDPReceiver`,并使用`Connect`函数来连接到UDP服务器。然后,使用`Receive`函数来接收数据。例如,在蓝图中,您可以创建以下操作:
![UE4 UDP Blueprint Example](https://i.imgur.com/ZCfGw3D.png)
这就是一个基本的UE4C++ UDP接收数据的示例。当然,这只是一个简单的示例,您可以根据自己的需求进行修改和扩展。
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