前情提要

1.创建Capsule，为其挂载如下物体及组件。
挂载物体：Main Camera、GroundCheck（空物体）

2.为Main Camera添加摄像机代码（CameraController）。

摄像机（角色）视角

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class CameraController : MonoBehaviour {
    public Transform player;
    private float mouseX, mouseY; //获取鼠标移动的值
    public float mouseSensitivity; //鼠标灵敏度
    public float xRotation;
    private void Start () {
        Cursor.lockState = CursorLockMode.Locked;
    }
    private void Update () {
        mouseX = Input.GetAxis ("Mouse X") * mouseSensitivity * Time.deltaTime;
        mouseY = Input.GetAxis ("Mouse Y") * mouseSensitivity * Time.deltaTime;
        xRotation -= mouseY;
        xRotation = Mathf.Clamp (xRotation, -70f, 70f);
        player.Rotate (Vector3.up * mouseX);
        transform.localRotation = Quaternion.Euler (xRotation, 0, 0);
    }
}

角色移动

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class PlayerController : MonoBehaviour {
    private CharacterController cc;//CharacterController
    public float moveSpeed;//移动速度
    public float jumpSpeed;//跳跃速度
    private float horizontalMove, verticalMove;
    private Vector3 dir;
    public float gravity;//重力
    private Vector3 velocity;//速率
    public Transform groundCheck;//地面检测
    public float checkRadius;
    public LayerMask groundLayer;
    public bool isGround;
    private void Start () {
        cc = GetComponent<CharacterController> ();
    }
    private void Update () {
        isGround = Physics.CheckSphere (groundCheck.position, checkRadius, groundLayer);
        if (isGround && velocity.y < 0) {
            velocity.y = -2f;
        }
        horizontalMove = Input.GetAxis ("Horizontal") * moveSpeed;//左右移动
        verticalMove = Input.GetAxis ("Vertical") * moveSpeed;//前后移动
        dir = transform.forward * verticalMove + transform.right * horizontalMove;
        cc.Move (dir * Time.deltaTime);
        if (Input.GetButtonDown ("Jump") && isGround) {
            velocity.y += jumpSpeed;
        }
        velocity.y -= gravity * Time.deltaTime;
        cc.Move (velocity * Time.deltaTime);
    }
}