获取鼠标左键点击 creator 3.8

    start() {    　　input.on(Input.EventType.MOUSE_DOWN, this.onMouseDown, this);     }       onMouseDown(event: EventMouse) {         switch (event.getButton()) {             case EventMouse.BUTTON_LEFT:                 console.log(‘BUTTON_LEFT’);                 break;         }     }