extjs的Ext.define()函数的用法以及注意点。

译自：http://docs.sencha.com/extjs/4.2.3/#!/api/Ext

define( className, data, [createdFn] ) : Ext.Base

Defines a class or override. A basic class is defined like this:

 Ext.define('My.awesome.Class', {     someProperty: 'something',     someMethod: function(s) {         alert(s + this.someProperty);     }     ... }); var obj = new My.awesome.Class(); obj.someMethod('Say '); // alerts 'Say something'

Parameters

• className : String

  The class name to create in string dot-namespaced format, for example: 'My.very.awesome.Class', 'FeedViewer.plugin.CoolPager' It is highly recommended to follow this simple convention: - The root and the class name are 'CamelCased' - Everything else is lower-cased Pass null to create an anonymous class.

• data : Object

  The key - value pairs of properties to apply to this class. Property names can be of any valid strings, except those in the reserved listed below: - mixins -statics - config - alias - xtype (for Components only) - self - singleton - alternateClassName - override

• createdFn : Function (optional)

  Callback to execute after the class is created, the execution scope of which (this) will be the newly created class itself.

Returns

• Ext.Base

注意：参数集中的data选项的key值（数据名）是有限制的，如下关键字不可用：

data : Object

The key - value pairs of properties to apply to this class. Property names can be of any valid strings, except those in the reserved listed below: - mixins -statics - config - alias - xtype (for Components only) - self - singleton - alternateClassName - override

即：

- mixins -statics - config - alias - xtype (for Components only) - self - singleton - alternateClassName - override


当然还包括其子类的属性和所有类的基类Ext.Base的所有属性，比如Ext.Base.extend   即如extend：'Ext.tree.Panel',




这些关键字不可用，因为这些key值被赋予了特殊的意义，具体参考官网说明。