從json獲取數據，如使用javascript和jquery加載更多

Question

嗨，我是javascript的noob並且做練習以提高我的技能。

我做了一個示例項目並使用getJSON從json獲取數據。

它工作正常，但我想要的是先顯示第三個索引數據，然后單擊loadMore按鈕。

首先我將用json填充“3 list item”，之后我需要每2 li才能填充loadMore點擊...這里是我的json數組

[
{
"imagepath" : "sample url",
"heading" : "sample heading",
"details" : "sample details"
},
{
"imagepath" : "sample url",
"heading" : "sample heading",
"details" : "sample details"
},
{
"imagepath" : "sample url",
"heading" : "sample heading",
"details" : "sample details"
},
{
"imagepath" : "sample url",
"heading" : "sample heading",
"details" : "sample details"
},
{
"imagepath" : "sample url",
"heading" : "sample heading",
"details" : "sample details"
},
{
"imagepath" : "sample url",
"heading" : "sample heading",
"details" : "sample details"
},
{
"imagepath" : "sample url",
"heading" : "sample heading",
"details" : "sample details"
},
]

這是示例代碼

$(document).ready(function(){
                $('#fetchit').click(function(){
                $.ajax({
                    url:"one.json",
                    cache: false,
                    dataType : "json",
                    success :function(){
                        //alert('bf c')
                        $('.hold').empty();
                        $.getJSON("one.json",function(data){
                            $.each(data ,function(i,value){
                                var list ="<li>" + "<img src'" + value.imagepath + "' alt=''/>" + "<span>" + value.heading + "</span>" + "<span>" + value.details + "</span>" 
                            $('.hold').append(list)
                            })
                        })
                    },
                    error:function(xhr,status,error){
                        alert(xhr.status)
                    }
                })
            })
        });

這個代碼只需點擊一下即可獲取整個json，但我想解析它或在點擊時將其加載到各個部分。 請使用ajax getJSON或javascript幫助我。 我無法做出loadMore的邏輯，我知道我們必須通過一些反擊來做到這一點......

Answer 1

試試這個： - http://jsfiddle.net/adiioo7/8erwrha2/

JS： -

var json = [{
    "imagepath": "sample url",
        "heading": "sample heading",
        "details": "sample details"
}, {
    "imagepath": "sample url",
        "heading": "sample heading",
        "details": "sample details"
}, {
    "imagepath": "sample url",
        "heading": "sample heading",
        "details": "sample details"
}, {
    "imagepath": "sample url",
        "heading": "sample heading",
        "details": "sample details"
}, {
    "imagepath": "sample url",
        "heading": "sample heading",
        "details": "sample details"
}, {
    "imagepath": "sample url",
        "heading": "sample heading",
        "details": "sample details"
}, {
    "imagepath": "sample url",
        "heading": "sample heading",
        "details": "sample details"
}];

jQuery(function ($) {
    $.each(json, function (i, value) {
        var list = "<li class='hidden' >" + "<img src'" + value.imagepath + "' alt=''/>" + "<span>" + value.heading + "</span>" + "<span>" + value.details + "</span>"
        $('.hold').append(list);
    });

    function loadMore(){
        $(".hold .hidden").slice(0,2).removeClass("hidden");
    }

    loadMore();

    $("#btnLoadMore").on("click",loadMore);        

});

HTML： -

<div class="hold"></div>
<input type="button" id="btnLoadMore" value="Load More"/>

CSS： -

.hidden {
    display:none;
}