# BlueprintCallable

- **功能描述：** 在蓝图中可以调用这个多播委托

- **元数据类型：** bool
- **引擎模块：** Blueprint
- **限制类型：** Multicast Delegates
- **作用机制：** 在PropertyFlags中加入[CPF_BlueprintCallable](../../../../Flags/EPropertyFlags/CPF_BlueprintCallable.md)
- **常用程度：** ★★★

在蓝图中可以调用这个多播委托。

## 示例代码：

```cpp
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FMyDynamicMulticastDelegate_One, int32, Value);

UPROPERTY(EditAnywhere, BlueprintReadWrite, BlueprintAssignable, BlueprintCallable)
	FMyDynamicMulticastDelegate_One MyMulticastDelegateAssignAndCall;

UPROPERTY(EditAnywhere, BlueprintReadWrite, BlueprintCallable)
	FMyDynamicMulticastDelegate_One MyMulticastDelegateCall;

UPROPERTY(EditAnywhere, BlueprintReadWrite, BlueprintAssignable)
	FMyDynamicMulticastDelegate_One MyMulticastDelegateAssign;

UPROPERTY(EditAnywhere, BlueprintReadWrite)
	FMyDynamicMulticastDelegate_One MyMulticastDelegate;
```

## 示例效果：

![Untitled](Untitled.png)

注意BlueprintAssignable和BlueprintCallable只能用于多播委托：

```cpp
DECLARE_DYNAMIC_DELEGATE_OneParam(FMyDynamicSinglecastDelegate_One, int32, Value);

//编译报错：'BlueprintCallable' is only allowed on a property when it is a multicast delegate
UPROPERTY(EditAnywhere, BlueprintReadWrite, BlueprintCallable)
	FMyDynamicSinglecastDelegate_One MyMyDelegate4;

	//编译报错：'BlueprintAssignable' is only allowed on a property when it is a multicast delegate
UPROPERTY(EditAnywhere, BlueprintReadWrite, BlueprintAssignable)
	FMyDynamicSinglecastDelegate_One MyMyDelegate5;
```