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@@ -125,3 +125,47 @@ DEFINE_FUNCTION(UJsonBlueprintFunctionLibrary::execGetField)
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- `P_NATIVE_BEGIN` 和 `P_NATIVE_END` : 宏包裹着真正执行该函数功能的被调用函数，若是泛型蓝图节点，此处调用该函数的泛型版本（泛型函数）
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- `RESULT_PARAM`: 表示函数返回值
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+## 异步节点
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+
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+自定义蓝图异步节点，最简单的方式是继承 `UBlueprintAsyncActionBase`
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+
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+使用 `UFUNCTION` 定义一个 `BlueprintCallable` 的 `static` 函数作为入口函数
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+
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+使用 `DELETAGE` 定义回调事件，作为出口节点，事件的参数就是节点的返回值
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+
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+```cpp
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+DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnRequestGPUInfoSuccess, int, Level);
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+DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnRequestGPUInfoFail, int, Level);
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+
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+UCLASS(meta = (HideThen = true))
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+class GPUINFO_API UGetGpuInfo : public UBlueprintAsyncActionBase
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+{
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+ GENERATED_BODY()
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+
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+public:
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+ UPROPERTY(BlueprintAssignable)
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+ FOnRequestGPUInfoSuccess OnSuccess;
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+
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+ UPROPERTY(BlueprintAssignable)
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+ FOnRequestGPUInfoFail OnFail;
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+
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+ UFUNCTION(BlueprintCallable, meta=( BlueprintInternalUseOnly="true", WorldContext = "InWOrldContext", DisplayName = "AsyncGetGpuInfo"))
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+ static UGetGpuInfo* CreateAsyncNode(UObject* InWorldContext, const FString& URL);
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+}
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+```
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+
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+
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+
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+> `UCLASS(meta = (HideThen = true))` 隐藏了默认的 `Then` 引脚
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+
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+```cpp
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+UGetGpuInfo* UGetGpuInfo::CreateAsyncNode(UObject* InWorldContext, const FString& URL)
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+{
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+ UGetGpuInfo* DownloadTask = NewObject<UGetGpuInfo>();
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+ DownloadTask->Start(URL);
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+ return DownloadTask;
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+}
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+```
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+
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+直接在 `static` 入口函数中创建对象，然后执行对应启动函数即可，在合适的时候 `Broadcast` 对应的事件即可
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+
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nicetry12138
