Ext.create方法分析

Ext.create方法实际上是Ext.ClassManager的instantiate的别名

分析如下：

 (function(Class, alias, arraySlice, arrayFrom, global) {
         var Manager = Ext.ClassManager = {...
         }
         ...
         Ext.apply(Ext, {

           create: alias(Manager, 'instantiate'),
           ...
     });
         ...
 }(Ext.Class, Ext.Function.alias, Array.prototype.slice, Ext.Array.from, Ext.global));

 create: alias(Manager, 'instantiate')

 create: Ext.Function.alias(Ext.ClassManager, 'instantiate')

 Ext.Function = {
     alias: function(object, methodName) {
         return function() {
             return object[methodName].apply(object, arguments);
         };
     },
     ...
 }

 create: function() {
             return object[methodName].apply(object, arguments);
         }

 create: function() {
             return Ext.ClassManager['instantiate'].apply(Ext.ClassManager, arguments);
         }