Unity 使用this关键字进行函数拓展 - AudioSource

Example：

var audioSource = GetComponent<AudioSource>();
audioSource
    .SetClip(bgm)
    .SetVolume(0.5f)
    .SetPriority(128)
    .SetPitch(1)
    .SetPanStereo(0)
    .SetSpatialBlend(0)
    .SetPlayOnAwake(true)
    .SetLoop(true)
    .Play();

Extension：

using UnityEngine;

namespace SK.Framework
{
    /// <summary>
    /// 音源相关拓展
    /// </summary>
    public static class AudioSourceExtension
    {
        /// <summary>
        /// 播放音频
        /// </summary>
        /// <param name="source">音源</param>
        /// <param name="clip">音频</param>
        /// <returns>音源</returns>
        public static AudioSource Play(this AudioSource source, AudioClip clip)
        {
            source.clip = clip;
            source.Play();
            return source;
        }
        /// <summary>
        /// 设置音频
        /// </summary>
        /// <param name="source">音源</param>
        /// <param name="clip">音频</param>
        /// <returns>音源</returns>
        public static AudioSource SetClip(this AudioSource source, AudioClip clip)
        {
            source.clip = clip;
            return source;
        }
        /// <summary>
        /// 设置Pitch属性
        /// </summary>
        /// <param name="source">音源</param>
        /// <param name="pitch"Pitch</param>
        /// <returns>音源</returns>
        public static AudioSource SetPitch(this AudioSource source, float pitch)
        {
            source.pitch = pitch;
            return source;
        }
        /// <summary>
        /// 设置优先级
        /// </summary>
        /// <param name="source">音源</param>
        /// <param name="priority">优先级</param>
        /// <returns>音源</returns>
        public static AudioSource SetPriority(this AudioSource source, int priority)
        {
            source.priority = priority;
            return source;
        }
        /// <summary>
        /// 设置循环
        /// </summary>
        /// <param name="source">音源</param>
        /// <param name="loop">是否循环</param>
        /// <returns>音源</returns>
        public static AudioSource SetLoop(this AudioSource source, bool loop)
        {
            source.loop = loop;
            return source;
        }
        /// <summary>
        /// 设置是否激活时播放
        /// </summary>
        /// <param name="source">音源</param>
        /// <param name="playOnAwake">是否激活时播放</param>
        /// <returns>音源</returns>
        public static AudioSource SetPlayOnAwake(this AudioSource source, bool playOnAwake)
        {
            source.playOnAwake = playOnAwake;
            return source;
        }
        /// <summary>
        /// 设置音量
        /// </summary>
        /// <param name="source">音源</param>
        /// <param name="volume">音量</param>
        /// <returns>音源</returns>
        public static AudioSource SetVolume(this AudioSource source, float volume)
        {
            source.volume = volume;
            return source;
        }
        /// <summary>
        /// 设置声道
        /// </summary>
        /// <param name="source">音源</param>
        /// <param name="panStereo">声道</param>
        /// <returns>音源</returns>
        public static AudioSource SetPanStereo(this AudioSource source, float panStereo)
        {
            source.panStereo = panStereo;
            return source;
        }
        /// <summary>
        /// 设置空间混合
        /// </summary>
        /// <param name="source">音源</param>
        /// <param name="spatialBlend">空间混合 0表示2D,1表示3D</param>
        /// <returns>音源</returns>
        public static AudioSource SetSpatialBlend(this AudioSource source, float spatialBlend)
        {
            source.spatialBlend = spatialBlend;
            return source;
        }
    }
}