使用陣列裏面的基因敲除可觀察

但是，UI上這些字段的更改沒有反映在視圖模型中，因爲按照Knockout文檔，observableArray會跟蹤數組中的哪些對象，而不是這些對象的狀態。

代碼看起來如下：

var RewardMissionModel = function() { 
    var self = this; 
    self.achievementID = ko.observable(); 
    self.rewardAsset = ko.observable(); 
    self.rewards = ko.observableArray([new Reward("Points", "Qty", "", "Item", "")]); 

    self.isDirty = false; 

    //Add reward 
    self.addReward = function() { 
     //var self = this; 
     var tempRewardType = "Points"; 
     self.rewards.push(new Reward(tempRewardType, "Qty", "", "Item", "", 0)); 
    }; 

    //Remove reward 
    self.removeReward = function (reward) { 
     if (self.rewards().length > 1) 
      self.rewards.remove(reward); 
    }; 
    //------------------------------------------------------------------------------ 
}; 

function Reward(rewardType, quantityLabel, rewardQuantity, itemLabel, item, itemID) { 
    var self = this; 
    //self.viewModel = viewModel; 
    self.rewardTypes = ["Points", "Coins", "Items"];  
    self.rewardType = ko.observable(rewardType); 
    self.itemLabel = ko.observable(itemLabel); 
    self.itemText = ko.observable(item); 
    self.quantityLabel = ko.observable(quantityLabel); 
    self.rewardQuantity = ko.observable(rewardQuantity); 
    this.selectedRewardType = ko.observable(rewardType); 
    self.isItemType = function (selectedRewardType) { 
     return selectedRewardType === this.selectedRewardType(); 
    } 

    self.itemID = ko.observable(itemID); 

}

HTML代碼：

<div data-bind="template: { name: 'rewards-template', foreach: rewards }"></div> 
       <script type="text/html" id="rewards-template"> 
        <span style="margin-left:30px">Reward Type</span> 
        <select class="dropdown" data-bind="options: rewardTypes, value: selectedRewardType"></select> 
        <span data-bind="text: itemLabel, visible: isItemType('Items')"></span>

當添加或移除對象到可觀察到的陣列的視圖模型髒標誌置位，但是當我修改上它不被考慮。

其中一種方法可能是將普通數組放入可觀察對象中。

是否有任何代碼示例來說明這個或任何更好的方法？

請幫忙。

來源

2013-04-01 Prasad

我認爲讓可觀察數組對象的屬性作爲可觀察對象的最好方法是使它們也可觀察，以便創建包含可觀察對象的可觀察數組。例如::

var viewModel = { 
    accounts: ko.observableArray([]), 
    init: function() { 
     this.accounts.push({ 
      Property1: ko.observable("some value"), 
      Property2: ko.observable("some value"), 
      Property3: ko.observable("some value") 
      }); 
     } 
    };

查收這個問題，我認爲這是你在找什麼

Updating of object inside observable array is done but changes are not coming on browser

來源

2013-04-01 12:01:45

function MyObject(val1, val2) 
{ 
    this.firstProperty = ko.observable(val1); 
    this.secondProperty = ko.observable(val1); 
} 

var myViewModel = new function() 
{ 
    var self = this; 
    self.values = ko.observableArray([]); 
    self.values.push(new MyObject("value11", "value12")); 
    self.values.push(new MyObject("value21", "value22")); 
}

來源

2013-04-01 12:06:54 Ilya

我實施類似於這裏提到的方法，但它不能正常工作。我用代碼塊更新了我的問題 – Prasad

使用陣列裏面的基因敲除可觀察

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