Unity的InputSystem使用实践

如何使用

首先得有一个PlayerInput在场景中，每一个PlayerInput表示一个玩家


在Actions里面选择自己的Actions，可以新建：



比如在PlayerMaps中的MoveActions就是一个2D向量组合器

比如新建一个
然后把键盘数字键8绑定成到UP，勾选下面的Keyboard&Mouse，这样就成了键盘的8键是我们的UP，同理绑定其他几个


然后在inspector面板中生成一下CS文件：

绑定事件

手动绑定

Send Messages或者Broadcast Messages

您可以通过定义组件，像这样的方法您的应用程序设置来响应行动：

public class MyPlayerScript : MonoBehaviour
{// "fire" action becomes "OnFire" method. If you're not interested in the// value from the control that triggers the action, use a method// without arguments.public void OnFire(){}// If you are interested in the value from the control that triggers an action,// you can declare a parameter of type InputValue.public void OnMove(InputValue value){// Read value from control. The type depends on what type of controls.// the action is bound to.var v = value.Get<Vector2>();// IMPORTANT: The given InputValue is only valid for the duration of the callback.//            Storing the InputValue references somewhere and calling Get<T>()//            later does not work correctly.}
}

UnityEvent Actions

Invoke Unity Events，每个动作必须被路由到目标方法。该方法与InputAction的started，performed和canceled回调具有相同的格式。

比如下面的方法形式

CSharp Events

事件为普通的CS事件（event），然后可以接收下面的事件通知
以下事件可用：

• onActionTriggered （针对玩家的所有动作的集体事件）；
• onDeviceLost；
• onDeviceRegained；
  用来检视设备变化

代码里面绑定回调

假如要实现2D物体的移动

代码注册回调：

 public InputManager inputActions;private Vector2 direction;private void Awake(){inputActions = new InputManager();}private void OnEnable(){inputActions.Enable();inputActions.Player.Move.performed += ctx =>  Move(ctx);inputActions.Player.Move.canceled += ctx => Move(ctx);}private void OnDisable(){inputActions.Player.Move.performed -= ctx =>  Move(ctx); ;inputActions.Player.Move.canceled -= ctx => Move(ctx);inputActions.Disable();}public void Move(InputAction.CallbackContext context){var moveValue = context.ReadValue<Vector2>();Debug.Log(moveValue);direction = moveValue;}void Update(){if (direction != Vector2.zero){Vector3 delta = new Vector3(direction.x, direction.y, 0) * Time.deltaTime * 5f;transform.position = transform.position + delta;}}

还有直接获取设备按键

Keyboard keyboard;keyboard = InputSystem.GetDevice<Keyboard>(); if (keyboard.wKey.isPressed)
{direction = new Vector2(0, 1);Vector3 delta = new Vector3(direction.x, direction.y, 0) * Time.deltaTime * 5f;transform.position = transform.position + delta;
}

按键是被按下还是被按住

Keyboard.current.spaceKey.isPressed
Keyboard.current.spaceKey.wasPressedThisFrame

额，最后发现按小键盘的数字键不会动，但是按主区域的数字键就可以，原因是绑定错了：
应该是Numpad8

修改过后保存

参考：

https://docs.unity3d.com/Packages/com.unity.inputsystem@1.0/manual/Components.html
https://www.youtube.com/watch?v=HwbbvjzT3qE
https://github.com/sniffle6/Input-System-Strategy-Pattern