我使用了该守则,该守则在论坛上发现,4.0.2a没有错误,现在4.0.7给我错误f 无效。 i 携带火力检查,发现

getIframe: function() {
  return this.getTargetEl().child( iframe );
},

c) 婴儿(一机)返回无效。

为什么这种情况发生于4.07?

http://jsfiddle.net/Cu9DZ/"rel=“nofollow> http://jsfiddle.net/Cu9DZ/。

Ext.define( Ext.panel.iframePanel , {
    extend  :  Ext.panel.Panel ,
    alias   :  widget.iframePanel ,

    src             :  about:blank ,
    loadingText     :  Loading ... ,
    loadingConfig   : null,

    renderTpl: [
         <div class="{baseCls}-body<tpl if="bodyCls"> {bodyCls}</tpl><tpl if="frame"> {baseCls}-body-framed</tpl><tpl if="ui"> {baseCls}-body-{ui}</tpl>"<tpl if="bodyStyle"> style="{bodyStyle}"</tpl>> ,
         <iframe src="{src}" width="100%" height="100%" frameborder="0"></iframe> ,
         </div> 
    ],

    initRenderData: function() {
        return Ext.applyIf(this.callParent(), {
            bodyStyle: this.initBodyStyles(),
            bodyCls: this.initBodyCls(),
            src: this.getSource()
        });
    },

    initComponent: function() {
        this.callParent(arguments);
        this.on( afterrender , this.onAfterRender, this, {});
    },

    /**
     * Gets the iframe element
     */
    getIframe: function() {
        return this.getTargetEl().child( iframe );
    },

    getSource: function() {
        return this.src;
    },

    setSource: function(src, loadingText) {
        this.src = src;
        var f = this.getIframe();
        if (loadingText || this.loadingText) {
            this.body.mask(loadingText || this.loadingText);
        }

        f.dom.src = src;
    },

    resetUrl: function() {
        var f = this.getIframe();
        f.dom.src = this.src;
    },

    onAfterRender: function() {
        var f = this.getIframe();
        f.on( load , this.onIframeLoaded, this, {});
    },

    onIframeLoaded: function() {
        if (this.loadingText) {
            this.body.unmask();
        }
    }
});

var printpanel = Ext.create( Ext.panel.Panel , {
    title       :  Print ,
    width       : 800,
    height      : 300,
    renderTo    : Ext.getBody(),
    bodyPadding : 5,
    layout      :  fit ,
    items:  Ext.widget( iframePanel , {
            border  : false,
            src     :   ,
            itemId  :  ds_print_panel 
            }),
    tbar: [ -> ,{
                text        :  Test ,           
                listeners: {
                    click: function(){
                        printpanel.down( #ds_print_panel ).setSource("http://www.rockstown.com/node/4");
                    }
                }
            }]          
});