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);
        }