ArrayBuffer轉換成字符串中文亂碼問題

  buf2str(buffer) {
      
      let  encodedString = String.fromCodePoint.apply(null, new Uint8Array(buffer));
      let decodedString = decodeURIComponent(escape(encodedString));//沒有這一步中文會亂碼
      console.log(decodedString);
      return decodedString
    },

　　時間緊迫，請看代碼。親測有效