在Unreal Engine中，你可以使用HTTP模块来获取图片。以下是一个简单的示例代码，展示如何通过HTTP请求获取图像并将其加载到UE的材质中：

#include "HttpModule.h"
#include "IImageWrapperModule.h"
#include "IImageWrapper.h"
void AYourActor::GetImageFromURL(FString URL)
{
    TSharedRef<IHttpRequest, ESPMode::ThreadSafe> HttpRequest = FHttpModule::Get().CreateRequest();
    HttpRequest->SetVerb("GET");
    HttpRequest->SetURL(URL);
    HttpRequest->OnProcessRequestComplete().BindUObject(this, &AYourActor::OnImageReceived);
    if (HttpRequest->ProcessRequest())
    {
        UE_LOG(LogTemp, Warning, TEXT("Request sent!"));
    }
}
void AYourActor::OnImageReceived(FHttpRequestPtr Request, FHttpResponsePtr Response, bool bWasSuccessful)
{
    if (bWasSuccessful && Response.IsValid())
    {
        TArray<uint8> ImageData = Response->GetContent();
        
        IImageWrapperModule& ImageWrapperModule = FModuleManager::LoadModuleChecked<IImageWrapperModule>(FName("ImageWrapper"));
        EImageFormat ImageFormat = ImageWrapperModule.DetectImageFormat(ImageData.GetData(), ImageData.Num());
        if (ImageFormat != EImageFormat::Invalid)
        {
            TSharedPtr<IImageWrapper> ImageWrapper = ImageWrapperModule.CreateImageWrapper(ImageFormat);
            if (ImageWrapper.IsValid() && ImageWrapper->SetCompressed(ImageData.GetData(), ImageData.Num()))
            {
                const TArray<uint8>* RawImageData = nullptr;
                if (ImageWrapper->GetRaw(ERGBFormat::BGRA, 8, RawImageData))
                {
                    FString TextureBasePath = FPaths::ProjectContentDir() + "/Textures/";
                    FString TexturePath = TextureBasePath + "YourTexture.png";
                    FFileHelper::SaveArrayToFile(*RawImageData, *TexturePath);
                    UTexture2D* LoadedTexture = LoadTextureFromDisk(TexturePath);
                    if (LoadedTexture)
                    {
                        // 使用LoadedTexture来设置材质等
                        UE_LOG(LogTemp, Warning, TEXT("Image loaded successfully!"));
                    }
                }
            }
        }
    }
}
UTexture2D* AYourActor::LoadTextureFromDisk(const FString& FilePath)
{
    UTexture2D* LoadedTexture = nullptr;
    TArray<uint8> FileData;
    if (!FFileHelper::LoadFileToArray(FileData, *FilePath))
    {
        UE_LOG(LogTemp, Error, TEXT("Failed to load file: %s"), *FilePath);
        return nullptr;
    }
    LoadedTexture = UTexture2D::CreateTransient(1, 1);
    LoadedTexture->SRGB = true;
    if (LoadedTexture->IsValidLowLevel())
    {
        EImageFormat ImageFormat = EImageFormat::Invalid;
        if (FPaths::GetExtension(FilePath) == ".png")
            ImageFormat = EImageFormat::PNG;
        else if (FPaths::GetExtension(FilePath) == ".jpg" || FPaths::GetExtension(FilePath) == ".jpeg")
            ImageFormat = EImageFormat::JPEG;
        TSharedPtr<IImageWrapper> ImageWrapper = FModuleManager::LoadModuleChecked<IImageWrapperModule>(FName("ImageWrapper")).CreateImageWrapper(ImageFormat);
        if (!ImageWrapper.IsValid() || !ImageWrapper->SetCompressed(FileData.GetData(), FileData.Num()))
        {
            UE_LOG(LogTemp, Error, TEXT("Failed to create image wrapper or set compressed data!"));
            return nullptr;
        }
        TArray<uint8> RawData;
        if (!ImageWrapper->GetRaw(ERGBFormat::BGRA, 8, RawData))
        {
            UE_LOG(LogTemp, Error, TEXT("Failed to get raw image data!"));
            return nullptr;
        }
        LoadedTexture->Source.Init(1, 1, 0, 1, ETextureSourceFormat::TSF_BGRA8, RawData.GetData());
        LoadedTexture->UpdateResource();
    }
    return LoadedTexture;
}

这段代码首先创建了一个HTTP请求并发送到指定的URL。当请求完成时，会调用OnImageReceived函数来处理响应数据。在该函数中，通过解析图像数据并保存为本地文件。然后，可以使用LoadTextureFromDisk函数加载图像文件为UE的纹理对象。

请确保引入了正确的模块头文件，并将URL替换为你要获取图像的URL地址。此外，还需注意加载和保存纹理时的路径设置和错误处理。

希望以上代码能够帮助你在UE中通过HTTP获取图片！


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