更改标签标题

Question

我试图从标签更改标题的标题，但它不会更改。我已经调试过了，变量不是null。这里是我的代码：

HTML文件只加载XML和js文件....

这里是我的xml文件：

<?php 
<object class="MPage1" name="MPage1" baseclass="MPage"> 
<property name="DesignConfigName">iPhone - Vertical (320x480)</property> 
<property name="DesignConfigWidth">320</property> 
<property name="DesignConfigHeight">480</property> 
<property name="UseBackground">1</property> 
    <property name="Animations">a:0:{}</property> 
    <property name="Background"></property> 
    <property name="Caption">MPage1</property> 
    <property name="Font"> 
    <property name="Family">Helvetica, Arial, sans-serif</property> 
    <property name="Size">16px</property> 
    </property> 
    <property name="Height">480</property> 
    <property name="HiddenFields">a:0:{}</property> 
    <property name="Name">MPage1</property> 
    <property name="Width">320</property> 
    <property name="jsOnAjaxCallComplete">MPage1AjaxCallComplete</property> 
    <property name="jsOnLoad">MPage1Load</property> 
    <object class="MButton" name="MButton1" > 
    <property name="Animations">a:0:{}</property> 
    <property name="Caption">Teste</property> 
    <property name="Height">43</property> 
    <property name="Left">99</property> 
    <property name="Name">MButton1</property> 
    <property name="Top">57</property> 
    <property name="Width">150</property> 
    <property name="jsOnClick">MButton1Click</property> 
    </object> 
    <object class="MLabel" name="MLabel1" > 
    <property name="Animations">a:0:{}</property> 
    <property name="Caption">dsadasdsa</property> 
    <property name="Font"> 
    <property name="Family">Helvetica, Arial, sans-serif</property> 
    <property name="Size">16px</property> 
    </property> 
    <property name="Height">115</property> 
    <property name="Left">77</property> 
    <property name="Name">MLabel1</property> 
    <property name="Top">175</property> 
    <property name="Width">195</property> 
    </object> 
</object> 
?> 

，在这里我的javascript：

function showRecords() { 
     results.text = ''; 
     db.transaction(function(tx) { 
      tx.executeSql(selectAllStatement, [], function(tx, result) { 
          dataset = result.rows; 
      for (var i = 0, item = null; i < dataset.length; i++) { 
       item = dataset.item(i); 
       var texto= item['nome'] + ' , ' + item['estoque']; 
       var areaDeTexto = document.getElementsByName('MLabel1'); 
       areaDeTexto.Caption = texto; 
      // alert(areaDeTexto.value)); 
} 
      }); 
     }); 
     } 

Answer 1

var areaDeTexto = document.getElementsByName('MLabel1'); 
areaDeTexto.Caption = texto; 

areaDeTexto将是一个集合，您无法为集合设置标题。您需要遍历集合来单独更改标题。 （可能有其他错误。）

新增假设所有东西都正常，则可以通过元素（分别从当前的循环）循环使用：

var areaDeTexto = document.getElementsByName('MLabel1'); 
for (var j = 0; j < areaDeTexto.length; j++) { 
    areaDeTexto.Caption = "some caption"; 
} 

，但我在拍这里有很多假设;特别是您可以通过这种方式更改标题。