优化一下这段代码if (res == null || res == "undefined" || res == "") { var timer1 = setTimeout(function () { errored( (ocrRes = { text: "链接服务器异常,请检查网络！", res: isEquals, }) ); }, 300); collectionTimer.push(timer1); } else { var result = JSON.parse(res); if (result == null || typeof result == "undefined" || result == "") { custom_toast("服务器连接失败,请稍后再次尝试"); } else if (result.errCode == "0") { var results = result.result; var returnText = ""; for (var i = 0; i < results.length; i++) { if (results[i] == "0") { if (hitString == returnText) { isEquals = true; break; } returnText = ""; } else { var charValue = String.fromCharCode(results[i]); returnText += charValue; } } if (result.errCode == 0 && isEquals) { var timer3 = setTimeout(function () { resolve( (ocrRes = { text: result.errCode, res: isEquals, }) ); }, 300); collectionTimer.push(timer3); } else { var timer2 = setTimeout(function () { errored( (ocrRes = { text: "-1", res: isEquals, }) ); }, 300); collectionTimer.push(timer2); } } else { var timerNum = setTimeout(function () { errored( (ocrRes = { text: result.errCode, res: isEquals, }) ); }, 300); collectionTimer.push(timerNum); } }

可以优化代码，将重复的条件判断语句合并，并且使用严格相等（===）来进行比较，同时将setTimeout函数提取出来，避免重复代码。优化后的代码如下：

if (!res) {
  var timer1 = setTimeout(function () {
    errored((ocrRes = { text: "链接服务器异常,请检查网络！", res: isEquals }));
  }, 300);
  collectionTimer.push(timer1);
} else {
  var result = JSON.parse(res);
  if (!result) {
    custom_toast("服务器连接失败,请稍后再次尝试");
  } else if (result.errCode === "0") {
    var results = result.result;
    var returnText = "";
    for (var i = 0; i < results.length; i++) {
      if (results[i] === "0") {
        if (hitString === returnText) {
          isEquals = true;
          break;
        }
        returnText = "";
      } else {
        var charValue = String.fromCharCode(results[i]);
        returnText += charValue;
      }
    }
    var timer;
    if (result.errCode === 0 && isEquals) {
      timer = setTimeout(function () {
        resolve((ocrRes = { text: result.errCode, res: isEquals }));
      }, 300);
    } else {
      timer = setTimeout(function () {
        errored((ocrRes = { text: "-1", res: isEquals }));
      }, 300);
    }
    collectionTimer.push(timer);
  } else {
    var timerNum = setTimeout(function () {
      errored((ocrRes = { text: result.errCode, res: isEquals }));
    }, 300);
    collectionTimer.push(timerNum);
  }
}

优化后的代码可读性更好，同时也更加简洁，避免了重复的代码。