单击按钮时循环遍历数组

Question

我有一个数组，我通过 json_encode(); 放入我的文件中；从我的 .php 文件中。数组如下所示：

{
  "15800175": {
    "posID": "159469",
    "scanID": "22597",
    "anr": "15800175",
    "TVanr": "",
    "code": "G-09-27-2E",
    "ean": "4710069680575",
    "marke": "fox",
    "bez": "jersey yellow",
    "bez2": "size xl",
    "menge": "1",
    "ve": "St\u00fcck",
    "Dimensionstext": "TT9857BG\r\n",
    "Langtext": ""
  },
  "15100027": {
    "posID": "159471",
    "scanID": "22597",
    "anr": "15100027",
    "TVanr": "",
    "code": "G-11-03-2A",
    "ean": "4712511825411",
    "marke": "fox",
    "bez2": "jersey L",
    "menge": "1",
    "ve": "St\u00fcck",
    "Dimensionstext": "blue\r\n",
    "Langtext": ""
  },

我想在一个看起来像这样的表格中显示值

Pos | code | bez | anr | qty | ve

我希望它首先显示数组的第一个位置，这将等于 15800175，对吗？然后当我按下“下一步”按钮时，它应该切换 div，隐藏第一个位置并显示第二个位置的值。

如何通过一键操作来显示相应的值？真的卡在这上面了。 谢谢！

Answer 1

在 javascript 中，afaik 中的“数组”和您在其中拥有的东西是有区别的，我们称之为“对象”。在 PHP 中，我想它们都被称为“数组”，当您有数组值的键时，它被称为“关联数组”，但在 Javascript 中，我们称这些“对象”以将它们与看起来像的数组区分开来[1,2,3]

所以第一步是把你的对象变成一个数组。我会这样做：

var obj = {
  "15800175": {
    "posID": "159469",
    "scanID": "22597",
    "anr": "15800175",
    "TVanr": "",
    "code": "G-09-27-2E",
    "ean": "4710069680575",
    "marke": "fox",
    "bez": "jersey yellow",
    "bez2": "size xl",
    "menge": "1",
    "ve": "St\u00fcck",
    "Dimensionstext": "TT9857BG\r\n",
    "Langtext": ""
  },
  "15100027": {
    "posID": "159471",
    "scanID": "22597",
    "anr": "15100027",
    "TVanr": "",
    "code": "G-11-03-2A",
    "ean": "4712511825411",
    "marke": "fox",
    "bez2": "jersey L",
    "menge": "1",
    "ve": "St\u00fcck",
    "Dimensionstext": "blue\r\n",
    "Langtext": ""
  }
}

var arr = Object.keys(obj).map(key => obj[key]);

最后是 arr 看起来像：

[{"posID":"159471","scanID":"22597","anr":"15100027","TVanr":"","code":"G-11-03-2A","ean":"4712511825411","marke":"fox","bez2":"jersey L","menge":"1","ve":"Stück","Dimensionstext":"blue\r\n","Langtext":""},{"posID":"159469","scanID":"22597","anr":"15800175","TVanr":"","code":"G-09-27-2E","ean":"4710069680575","marke":"fox","bez":"jersey yellow","bez2":"size xl","menge":"1","ve":"Stück","Dimensionstext":"TT9857BG\r\n","Langtext":""}]

然后，您可以使用 forEach 回调 arr.forEach(item => {}); 遍历 arr 中的每个对象，然后随意渲染它们。

Answer 2

您好，这里使用@Tkol 方法是一种将元素一一添加到您的 html 表的解决方案；

html:

var obj = {
  "15800175": {
    "posID": "159469",
    "scanID": "22597",
    "anr": "15800175",
    "TVanr": "",
    "code": "G-09-27-2E",
    "ean": "4710069680575",
    "marke": "fox",
    "bez": "jersey yellow",
    "bez2": "size xl",
    "menge": "1",
    "ve": "St\u00fcck",
    "Dimensionstext": "TT9857BG\r\n",
    "Langtext": ""
  },
  "15100027": {
    "posID": "159471",
    "scanID": "22597",
    "anr": "15100027",
    "TVanr": "",
    "code": "G-11-03-2A",
    "ean": "4712511825411",
    "marke": "fox",
    "bez2": "jersey L",
    "menge": "1",
    "ve": "St\u00fcck",
    "Dimensionstext": "blue\r\n",
    "Langtext": ""
  }
}
var counter = 0;
var arr = Object.keys(obj).map(key => obj[key]);
document.getElementById("btnAdd").onclick = function(event){
//variables
let tbody = document.getElementById("tbodyExample");

//logic
let element  = arr[counter] != undefined ? arr[counter] : undefined;
if(element !== undefined){
var row = document.createElement('tr');//'<tr id="'+element.posID+'"></tr>';
  row.setAttribute("id",element.posID);
  row.innerHTML = '<td>'+element.posID+'</td><td>'+element.code+'</td><td>'+(element.bez == undefined? element.bez2 : element.bez)+'</td><td>'+element.anr+'</td><td>'+element.menge+'</td><td>'+element.ve+'</td>';
  tbody.appendChild(row);
  counter++;
}else{
alert("No more items found");
}
}

<h2>Table example</h2>
<table id="example" border=1>
  <thead>
    <th>Post</th>
    <th>code</th>
    <th>bez</th>
    <th>anr</th>
    <th>qty</th>
    <th>ve</th>
  </thead>
  <tbody id="tbodyExample">
    
  </tbody>
</table>
<br>
<input type="button" id="btnAdd" value="add Row">

希望对你有帮助