Dev/0.6 plus (#590)

* fix: the bug that inputmanager cannot be obtained

packages/core/src/Engine.ts

@@ -48,6 +48,7 @@ export class Engine extends EventDispatcher {
 
   /** Physics manager of Engine. */
   readonly physicsManager: PhysicsManager;
+  readonly inputManager: InputManager;
 
   _componentsManager: ComponentsManager = new ComponentsManager();
   _hardwareRenderer: IHardwareRenderer;
@@ -72,8 +73,6 @@ export class Engine extends EventDispatcher {
   /** @internal */
   _spriteMaskManager: SpriteMaskManager;
   /** @internal */
-  _inputManager: InputManager;
-  /** @internal */
   _macroCollection: ShaderMacroCollection = new ShaderMacroCollection();
 
   protected _canvas: Canvas;
@@ -196,7 +195,7 @@ export class Engine extends EventDispatcher {
     this._spriteDefaultMaterial = this._createSpriteMaterial();
     this._spriteMaskDefaultMaterial = this._createSpriteMaskMaterial();
 
-    this._inputManager = new InputManager(this);
+    this.inputManager = new InputManager(this);
 
     const whitePixel = new Uint8Array([255, 255, 255, 255]);
 
@@ -278,7 +277,7 @@ export class Engine extends EventDispatcher {
         this.physicsManager._update(deltaTime / 1000.0);
         componentsManager.callColliderOnLateUpdate();
       }
-      this._inputManager._update();
+      this.inputManager._update();
       componentsManager.callScriptOnUpdate(deltaTime);
       componentsManager.callAnimationUpdate(deltaTime);
       componentsManager.callScriptOnLateUpdate(deltaTime);
@@ -308,7 +307,7 @@ export class Engine extends EventDispatcher {
     if (this._sceneManager) {
       this._whiteTexture2D.destroy(true);
       this._whiteTextureCube.destroy(true);
-      this._inputManager._destroy();
+      this.inputManager._destroy();
       this.trigger(new Event("shutdown", this));
       engineFeatureManager.callFeatureMethod(this, "shutdown", [this]);