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我想創建一個計算的observable並將其顯示在頁面上,並且我已經這樣做過,但是我開始懷疑淘汰賽是否已經改變 - 除了totalAmount上的綁定之外,由於某種原因,它永遠不會改變......任何想法?淘汰賽計算沒有更新
我的模型如下:
var cartItem = function(item){
this.itemName = item.title;
this.itemPrice = item.price;
this.itemID = item.id;
this.count=0;
}
var cartModel = {
self:this,
footers:ko.observableArray([{title:'item1',text:'this is item1 text',image:'images/products/items/item1.png',price:15.99,id:1},
{title:'item2',text:'this is item2 text',image:'images/products/items/item2.png',price:25.99,id:2},
{title:'item3',text:'this is item3 text',image:'images/products/items/item3.png',price:55.99,id:3},
{title:'item4',text:'this is item4 text',image:'images/products/items/item4.png',price:5.99,id:4},
]),
cart:ko.observableArray([]),
addToCart:function(){
if(cartModel.cart().length>0){
for(var i=0;i<cartModel.cart().length;i++){
if(this.id==cartModel.cart()[i].itemID){
cartModel.cart()[i].count += 1;
}
else{
cartModel.cart().push(new cartItem(this));
}
}
}else{
cartModel.cart().push(new cartItem(this));
}
console.log(cartModel.cart().length);
}
}
this.cartModel.totalAmount=ko.computed(function(){
return this.cart().length;
},this.cartModel);
ko.applyBindings(cartModel);
這裏是相關的HTML:
<div data-bind="template:{name:'footerTemplate',foreach:cartModel.footers}">
<script type="text/html" id="footerTemplate">
<div class="row">
<span class="span2"><h3 data-bind="text: title"></h3></span>
<span class="span2"><img data-bind="attr:{src: image}"/></span>
<span class="span5" data-bind="text:text"></span>
<span class="span1" data-bind="text:price"></span>
<spand class="span2"><button data-bind="click:$parent.addToCart">add</button></span>
</div>
</script>
</div>
<div class="row">
<span class="span2" data-bind="text:totalAmount"></span>
</div>
您的模型是否在車身標籤內? – 2013-05-14 12:25:09
是的,對不起,我沒有包含所有的HTML,只是相應的代碼片段 – 2013-05-14 12:50:19