調用函數內的對象文字元素

Question

我想調用函數內部的對象文字元素，它不工作......當它調用函數內部的元素「image」時它給了我一個未定義的錯誤。

var w1 = {warframeName:"Ash", health:450, shield:300, power:150, armor:65.0, sprint:1.15, stamina:100, image:"images/warframes/ash.jpg"}; 

$(".woption").click(function() { 
    var wClass = $(this).attr('class').split(' ')[0]; 

    for(var x = 1; x <23; x++) { 
     if(wClass == "w"+x) { 
      $(".warframe_selector").css("background", "url(" + ('w'+x).image +") no-repeat", "important"); 
      $(".warframe_selector").css("background-size", "100%"); 
     } else {} 
    } 

    $("#cover").fadeOut(function() {}); 
    $(".warframe_option").fadeOut(function() {}); 
}); 

Answer 1

在代碼w1心不是陣列，它的一個變量指向對象文本。這意味着你只是不能像('w' + 1).image那樣訪問它。你有兩個選擇

1. 使其成爲一個數組，訪問它像一個數組

   var w = [{warframeName:"Ash", health:450, shield:300, power:150, armor:65.0, sprint:1.15, stamina:100, image:"images/warframes/ash.jpg"}]; 
   ... w[x].image ... 
   

2. 使對象的文字有一定的範圍，並用方括號來訪問它

   window.myNamespace = {}; 
   window.myNamespace.w1 = {warframeName:"Ash", health:450, shield:300, power:150, armor:65.0, sprint:1.15, stamina:100, image:"images/warframes/ash.jpg"} 
   ... window.myNamespace['w' + x].image ... 
   

Answer 2

您可以使用如下的eval。

var w1 = {warframeName:"Ash", health:450, shield:300, power:150, armor:65.0, sprint:1.15, stamina:100, image:"images/warframes/ash.jpg"}; 

$(".woption").click(function() { 
    var wClass = $(this).attr('class').split(' ')[0]; 

    for(var x = 1; x <23; x++) { 
     if(wClass == "w"+x) { 
      $(".warframe_selector").css("background", "url(" + eval('w'+x).image +") no-repeat", "important"); 
      $(".warframe_selector").css("background-size", "100%"); 
     } else {} 
    } 

    $("#cover").fadeOut(function() {}); 
    $(".warframe_option").fadeOut(function() {}); 
}); 

但如果你使用

var w = []; w[1] = {warframeName:"Ash", health:450, shield:300, power:150, armor:65.0, sprint:1.15, stamina:100, image:"images/warframes/ash.jpg"}; 

，你可以訪問一個較爲帥氣的方式你的價值觀。 I.E.

var w = []; w[1] = {warframeName:"Ash", health:450, shield:300, power:150, armor:65.0, sprint:1.15, stamina:100, image:"images/warframes/ash.jpg"}; 
var x = 1; 
w[x].image