呼叫「這個」 INIT

Question

之外。當我嘗試做var idx = this.dataview.getIdxById(dataContext.id);在我的init外的無功函數，我得到這個消息

Uncaught TypeError: Cannot call method 'getIdxById' of undefined

。我怎樣才能訪問這個？這僅僅是基本骨架（是的CustomFormatter相隔一列定義的）：

function($) { 
    /** 
    * @class test.test.testing 
    */ 

    /** @Static */ 
    { 
     defaults : { 
    columns: [{id: "hello", 
         name: "hello", 
         field: "hello", 
         width: 150, 
         sortable: true, 
         formatter: customFormatter},], 
     } 
    }, 
    /** @Prototype */ 
    { 
    init : function() { 
      this._super(); //the grid 
     } 
    }); 
}); 

var customFormatter = function (row, cell, value, columnDef, dataContext) { 
    var idx = this.dataview.getIdxById(dataContext.id); 
}; 

Answer 1

您沒有提供了足夠的細節，但我的猜測是，這個變量沒有被設置爲你想要的。實際上，這是不確定的。嘗試將代碼更改爲以下代碼：

var customFormatter = function (me, row, cell, value, columnDef, dataContext) { 
    var idx = me.dataview.getIdxById(dataContext.id); 
}; 
// adding argument for this, and then call: 
customFormatter(this, row, cell, value, columnDef, dataContext); 

var customFormatter = function (me, row, cell, value, columnDef, dataContext) { 
    var idx = me.dataview.getIdxById(dataContext.id); 
}; 
// adding argument for this, and then call: 
customFormatter(this, row, cell, value, columnDef, dataContext);