sked/Assets/Script/Common/TiltCamera.cs

using UnityEngine;
using System.Collections;
using DG.Tweening;

public class TiltCamera : MonoBehaviour {
    [OnlyRead]
    public bool isShaking = false;
    [Range(0, 2f)]
    public float shakePower = 0.02f;
    [Range(0, 1f)]
    public float time = 0.2f;
    private Vector3 initialPosition;

    void Start()
    {
        initialPosition = transform.localPosition;
    }

    float timeSum = 0;
    public void Shaking(float power, float duration)
    {
        if (0 < power)
        {
            shakePower = power;
            time = duration;

            if (!isShaking)
                StartCoroutine(ShakingCo());
        }
    }
    IEnumerator ShakingCo()
    {
        isShaking = true;
        Vector3 pos = Vector3.zero;

        timeSum = 0;
        while (timeSum < time)
        {
            yield return null;

            if (isShaking)
            {
                pos = initialPosition + Random.insideUnitSphere * shakePower;
                pos.z = initialPosition.z;
                transform.localPosition = pos;
            }

            timeSum += Time.deltaTime;
        }

        transform.localPosition = initialPosition;
        isShaking = false;
    }
}