javascript - 设置值时SC.ImageView引发错误

Question

设置子类SproutCore ImageView (value)的SC.ImageView属性时，将引发运行时错误:

在Safari和Firefox中:

TypeError: Result of expression 'elem.setAttribute' [undefined] is not a function.

在Chrome中:

Uncaught TypeError: Object DigDeeper.ZoomLayerView:sc398 has no method 'setAttribute'

该错误在以下代码的 /static/sproutcore/foundation/en/current/javascript.js中发生(第4735行):

// convert the value to a string (all browsers do this but IE) see 
// #1070 (jQuery)
if ( set ) elem.setAttribute( name, "" + value );

图像已加载但不显示。

我正在使用来自 ruby gem 的当前版本的 Sproutcore 芯(似乎是1.4.5)。

我该如何解决这个问题？

来源如下:

DigDeeper.ZoomTileView = SC.ImageView.extend({

    // Properties
    zoom: null,
    layer: null,
    scaleIndex: null,
    column: null,
    row: null,

    // Overridden properties
    classNames: [ 'zoom-tile-view' ],

    // Computed properties
    scale: function () {
        return Math.pow( 2, this.get( 'scaleIndex' ) );
    }.property( 'scaleIndex' ),

    id: function () {
        return "%@.%@.%@.%@".fmt(
            DigDeeper.ZoomTileView.zeroPad( 0, 5 ),
            DigDeeper.ZoomTileView.zeroPad( this.get( 'scale' ), 0 ),
            DigDeeper.ZoomTileView.zeroPad( this.get( 'column' ), 0 ),
            DigDeeper.ZoomTileView.zeroPad( this.get( 'row' ), 0 )
        );
    }.property('layer','scaleIndex','column','row').cacheable(),

    value: function () {
        return "/static/dig_deeper/en/current/resources/images/%@.png".fmt( this.get( 'id' ) );
    }.property( 'id' ),

});

Answer 1

您的value方法上有一个逗号结尾。

删除它可能会解决您的问题。