谷歌地圖商店定位器修改硬編碼的初始化動態

Question

我試圖修改此示例 http://storelocator.googlecode.com/git/examples/panel.html

的JavaScript代碼是在這裏： https://gist.github.com/2725336

我遇到了正在改變這種困難的方面：

MedicareDataSource.prototype.FEATURES_ = new storeLocator.FeatureSet(
    new storeLocator.Feature('Wheelchair-YES', 'Wheelchair access'), 
    new storeLocator.Feature('Audio-YES', 'Audio') 
); 

從函數創建的FeatureSet，因此，例如我有這種功能，它解析JSON對象

WPmmDataSource.prototype.setFeatures_ = function(json) { 
    var features = []; 

    // convert features JSON to js object 
    var rows = jQuery.parseJSON(json); 

    // iterate through features collection 
    jQuery.each(rows, function(i, row){ 

    var feature = new storeLocator.Feature(row.slug + '-YES', row.name) 

    features.push(feature); 
    }); 

    return new storeLocator.FeatureSet(features); 
    }; 

所以後來改第一代碼片段爲類似

WPmmDataSource.prototype.FEATURES_ = this.setFeatures_(wpmm_features); 

返回一個錯誤：

Uncaught TypeError: Object [object Window] has no method 'setFeatures_' 

Answer 1

我認爲你必須要做出一些改變WPmmDataSource.prototype和你setFeatures_方法：

WPmmDataSource.prototype = { 
    FEATURES_ : null,   
    setFeatures_ : function(json) { 
     //Set up an empty FEATURES_ FeatureSet 
     this.FEATURES_ = new storeLocator.FeatureSet(); 
     //avoid the use of "this" within the jQuery loop by creating a local var 
     var featureSet = this.FEATURES_; 
     // convert features JSON to js object 
     var rows = jQuery.parseJSON(json); 
     // iterate through features collection 
     jQuery.each(rows, function(i, row) { 
      featureSet.add(
       new storeLocator.Feature(row.slug + '-YES', row.name)); 
     }); 
    } 
} 

與此同時，您不必通過從setFeatures_返回值來完成任務;它可以直接訪問FEATURES_會員。所以行：

WPmmDataSource.prototype.FEATURES_ = this.setFeatures_(wpmm_features); 

不再需要。這也意味着，以後，當您創建的WPmmDataSource一個實例，你的代碼可以像這樣的工作：

var wpmd = new WPmmDataSource(/* whatever options, etc. you want */); 
wpmd.setFeatures_(json); 
// Thereafter, wpmd will have its FEATURES_ set 

我不太確定你想達到什麼樣的，但我相信這將讓你過你目前失速的障礙。我希望這讓你前進 -