javascript 将 extjs 项目动态添加到字段容器
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Dynamically adding extjs items to field container
提问by Ravi
I am using a extjs field container for my application where I have details, funds, dependants sections in the form. In the funds and dependants section I have a button 'add another' which is intended to add a new line item every time when button is clicked.
我正在为我的应用程序使用 extjs 字段容器，其中表单中有详细信息、资金、家属部分。在资金和家属部分，我有一个“添加另一个”按钮，旨在每次单击按钮时添加一个新的行项目。
This is the form i have created
http://jsbin.com/evevod/4/edit
这是我创建的表单
http://jsbin.com/evevod/4/edit
I am new to extjs4. Can anyone please help me how to create a item dynamically onclick?
我是 extjs4 的新手。任何人都可以帮助我如何在点击时动态创建项目？
回答by Krzysztof
Below is example handler.
下面是示例处理程序。
handler: function() {
var container = this.up('fieldset');
var config = Ext.apply({}, container.initialConfig.items[0]);
config.fieldLabel = container.items.length + 1;
container.add(config);
}
Basically it finds parent component which holds rows (which is fieldset), access initialConfigproperty, finds first line config in it (items[0]), makes shallow copy of config (Ext.apply) and adds it to container (container.add).
基本上它找到包含行（即字段集）的父组件，访问initialConfig属性，在其中找到第一行配置（items[0]），制作配置（Ext.apply）的浅拷贝并将其添加到容器（container.add）。
Working sample: http://jsbin.com/evevod/6/edit#preview
回答by rgarg
We can change the name of fields like this:
我们可以像这样更改字段的名称：
var container = this.up('fieldset');
var config = Ext.apply({}, container.initialConfig.items[0]);
config.fieldLabel = container.items.length+1;
config.items[0].name = 'fname' + config.fieldLabel;
config.items[1].name = 'lname' + config.fieldLabel;
config.items[2].name = 'title' + config.fieldLabel;
