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Home  >  Article  >  Web Front-end  >  About how to use dropload.js

About how to use dropload.js

一个新手
一个新手Original
2017-10-20 11:15:1016588browse

The first step is to download the dropload plug-in. The official document of the dropload plug-in download address is: https://github.com/ximan/dropload
The second step is to download the dropload.css in the downloaded dropload plug-in, dropload. The min.js file is introduced into the page. Note Also introduce Jquery1.7 or Zepto. Choose one of the two, do not quote both at the same time, because dropload is based on jquery Implementation
The third step is to put the following code at the bottom of the page. Pay attention to the bottom, otherwise the dropload plug-in will not be able to obtain the height.

**基本代码结构**//#content为某个p的id  var dropload = $('#content').dropload({   
//scrollArea很关键，要不然加载更多不起作用  scrollArea : window,  
domUp : {  
    domClass   : 'dropload-up',  
    domRefresh : &#39;<p class="dropload-refresh">↓下拉刷新</p>&#39;,  
    domUpdate  : &#39;<p class="dropload-update">↑释放更新</p>&#39;,  
    domLoad    : &#39;<p class="dropload-load"><span class="loading"></span>加载中...</p>&#39;  },  
domDown : {  
    domClass   : &#39;dropload-down&#39;,  
    domRefresh : &#39;<p class="dropload-refresh">↑上拉加载更多</p>&#39;,  
    domLoad    : &#39;<p class="dropload-load"><span class="loading"></span>加载中...</p>&#39;,  
    domNoData  : &#39;<p class="dropload-noData">暂无数据</p>&#39;  
   },  
loadUpFn : function(me){  
        //下拉刷新需要调用的函数  
        alert("下拉刷新需要调用的函数");  
        //重置下拉刷新  
        me.resetload();      
},  
loadDownFn : function(me){  
        //上拉加载更多需要调用的函数  
        alert("上拉加载更多需要调用的函数");  
        //定时器函数,为了看出上拉加载更多效果  
            setTimeout(function(){  
                // 每次数据加载完，必须重置  
                    me.resetload();  
                },1000);  
           }  
});

Some complete examples on demand Just check it

Example 1, load the bottom

<script>$(function(){
    // 页数
    var page = 0;    // 每页展示5个
    var size = 5;    // dropload调用
    $(&#39;.content&#39;).dropload({
        scrollArea : window,
        loadDownFn : function(me){
            page++;            // 拼接HTML
            var result = &#39;&#39;;
            $.ajax({
                type: &#39;GET&#39;,
                url: &#39;http://ons.me/tools/dropload/json.php?page=&#39;+page+&#39;&size=&#39;+size,//配合后台接口
                dataType: &#39;json&#39;,
                success: function(data){
                    var arrLen = data.length;                    
                        if(arrLen > 0){                        
                            for(var i=0; i<arrLen; i++){
                            result +=   &#39;<a class="item opacity" href="&#39;+data[i].link+&#39;">&#39;
                                            +&#39;<img src="&#39;+data[i].pic+&#39;" alt="">&#39;
                                            +&#39;<h3>&#39;+data[i].title+&#39;</h3>&#39;
                                            +&#39;<span class="date">&#39;+data[i].date+&#39;</span>&#39;
                                        +&#39;</a>&#39;;
                        }                    // 如果没有数据
                    }else{                        // 锁定
                        me.lock();                        // 无数据
                        me.noData();
                    }                    // 为了测试，延迟1秒加载
                    setTimeout(function(){
                        // 插入数据到页面，放到最后面
                        $(&#39;.lists&#39;).append(result);                        // 每次数据插入，必须重置
                        me.resetload();
                    },1000);
                },
                error: function(xhr, type){
                    alert(&#39;Ajax error!&#39;);                    // 即使加载出错，也得重置
                    me.resetload();
                }
            });
        }
    });
});</script>

Example 2, load the top, bottom

<script>
$(function(){
    // 页数
    var page = 0;    // 每页展示10个
    var size = 10;    // dropload
    $(&#39;.content&#39;).dropload({
        scrollArea : window,
        domUp : {
            domClass   : &#39;dropload-up&#39;,
            domRefresh : &#39;<p class="dropload-refresh">↓下拉刷新-自定义内容</p>&#39;,
            domUpdate  : &#39;<p class="dropload-update">↑释放更新-自定义内容</p>&#39;,
            domLoad    : &#39;<p class="dropload-load"><span class="loading"></span>加载中-自定义内容...</p>&#39;
        },
        domDown : {
            domClass   : &#39;dropload-down&#39;,
            domRefresh : &#39;<p class="dropload-refresh">↑上拉加载更多-自定义内容</p>&#39;,
            domLoad    : &#39;<p class="dropload-load"><span class="loading"></span>加载中-自定义内容...</p>&#39;,
            domNoData  : &#39;<p class="dropload-noData">暂无数据-自定义内容</p>&#39;
        },
        loadUpFn : function(me){
            $.ajax({
                type: &#39;GET&#39;,
                url: &#39;json/update.json&#39;,
                dataType: &#39;json&#39;,
                success: function(data){
                    var result = &#39;&#39;;                    
                    for(var i = 0; i < data.lists.length; i++){
                        result +=   &#39;<a class="item opacity" href="&#39;+data.lists[i].link+&#39;">&#39;
                                        +&#39;<img src="&#39;+data.lists[i].pic+&#39;" alt="">&#39;
                                        +&#39;<h3>&#39;+data.lists[i].title+&#39;</h3>&#39;
                                        +&#39;<span class="date">&#39;+data.lists[i].date+&#39;</span>&#39;
                                    +&#39;</a>&#39;;
                    }                    // 为了测试，延迟1秒加载
                    setTimeout(function(){
                        $(&#39;.lists&#39;).html(result);                        // 每次数据加载完，必须重置
                        me.resetload();                        // 重置页数，重新获取loadDownFn的数据
                        page = 0;                        // 解锁loadDownFn里锁定的情况
                        me.unlock();                        me.noData(false);
                    },1000);
                },
                error: function(xhr, type){
                    alert(&#39;Ajax error!&#39;);                    // 即使加载出错，也得重置
                    me.resetload();
                }
            });
        },
        loadDownFn : function(me){
            page++;            // 拼接HTML
            var result = &#39;&#39;;
            $.ajax({
                type: &#39;GET&#39;,
                url: &#39;http://ons.me/tools/dropload/json.php?page=&#39;+page+&#39;&size=&#39;+size,
                dataType: &#39;json&#39;,
                success: function(data){
                    var arrLen = data.length;                    
                    if(arrLen > 0){                        for(var i=0; i<arrLen; i++){
                            result +=   &#39;<a class="item opacity" href="&#39;+data[i].link+&#39;">&#39;
                                            +&#39;<img src="&#39;+data[i].pic+&#39;" alt="">&#39;
                                            +&#39;<h3>&#39;+data[i].title+&#39;</h3>&#39;
                                            +&#39;<span class="date">&#39;+data[i].date+&#39;</span>&#39;
                                        +&#39;</a>&#39;;
                        }                    // 如果没有数据
                    }else{                        // 锁定
                        me.lock();                        // 无数据
                        me.noData();
                    }                    // 为了测试，延迟1秒加载
                    setTimeout(function(){
                        // 插入数据到页面，放到最后面
                        $(&#39;.lists&#39;).append(result);                        // 每次数据插入，必须重置
                        me.resetload();
                    },1000);
                },
                error: function(xhr, type){
                    alert(&#39;Ajax error!&#39;);                    // 即使加载出错，也得重置
                    me.resetload();
                }
            });
        },
        threshold : 50
    });
});
</script>

Example 3, load multiple times

$(function(){
        //利用此写法，可以限制多次加载的个数。
    var timer;

    $(&#39;.header .ipt&#39;).on(&#39;input&#39;,function(){
        var _length = $(this).val();        // 如果输入值不是数字或者是空，就跳出
        if(isNaN(_length) || _length === &#39;&#39;){            
        return false;
        }
        clearTimeout(timer);
        timer = setTimeout(function(){//也可不用定时器
            // 清空内容
            $(&#39;.lists&#39;).html(&#39;&#39;);
            $(&#39;.dropload-down&#39;).remove();            
            var counter = 0;            // 每页展示4个
            var num = 4;            
            var pageStart = 0,pageEnd = 0;            // dropload
            $(&#39;.content&#39;).dropload({
                scrollArea : window,
                loadDownFn : function(me){
                    $.ajax({
                        type: &#39;GET&#39;,
                        url: &#39;json/more.json&#39;,
                        dataType: &#39;json&#39;,
                        success: function(data){
                            var result = &#39;&#39;;
                            counter++;
                            pageEnd = num * counter;
                            pageStart = pageEnd - num;                            
                            .for(var i = pageStart; i < pageEnd; i++){
                                result +=   &#39;<a class="item opacity" href="&#39;+data.lists[i].link+&#39;">&#39;
                                                +&#39;<img src="&#39;+data.lists[i].pic+&#39;" alt="">&#39;
                                                +&#39;<h3>&#39;+data.lists[i].title+&#39;</h3>&#39;
                                                +&#39;<span class="date">&#39;+data.lists[i].date+&#39;</span>&#39;
                                            +&#39;</a>&#39;;                                
                                            if((i + 1) >= _length || (i + 1) >= data.lists.length){                                    // 锁定
                                    me.lock();                                    // 无数据
                                    me.noData();                                    
                                    break;
                                }
                            }                            // 为了测试，延迟1秒加载
                            setTimeout(function(){
                                $(&#39;.lists&#39;).append(result);                                // 每次数据加载完，必须重置
                                me.resetload();
                            },1000);
                        },
                        error: function(xhr, type){
                            alert(&#39;Ajax error!&#39;);                            // 即使加载出错，也得重置
                            me.resetload();
                        }
                    });
                }
            });
        },500);
    });

Example 4 , fixed layout, loading top and bottom

$(function(){
    // 按钮操作
    $(&#39;.header .btn&#39;).on(&#39;click&#39;,function(){
        var $this = $(this);        
        if(!!$this.hasClass(&#39;lock&#39;)){
            $this.attr(&#39;class&#39;,&#39;btn unlock&#39;);
            $this.text(&#39;解锁&#39;);            // 锁定
            dropload.lock();
            $(&#39;.dropload-down&#39;).hide();
        }else{
            $this.attr(&#39;class&#39;,&#39;btn lock&#39;);
            $this.text(&#39;锁定&#39;);            // 解锁
            dropload.unlock();
            $(&#39;.dropload-down&#39;).show();
        }
    });    // dropload
    var dropload = $(&#39;.inner&#39;).dropload({
        domUp : {
            domClass   : &#39;dropload-up&#39;,
            domRefresh : &#39;<p class="dropload-refresh">↓下拉刷新</p>&#39;,
            domUpdate  : &#39;<p class="dropload-update">↑释放更新</p>&#39;,
            domLoad    : &#39;<p class="dropload-load"><span class="loading"></span>加载中...</p>&#39;
        },
        domDown : {
            domClass   : &#39;dropload-down&#39;,
            domRefresh : &#39;<p class="dropload-refresh">↑上拉加载更多</p>&#39;,
            domLoad    : &#39;<p class="dropload-load"><span class="loading"></span>加载中...</p>&#39;,
            domNoData  : &#39;<p class="dropload-noData">暂无数据</p>&#39;
        },
        loadUpFn : function(me){
            $.ajax({
                type: &#39;GET&#39;,
                url: &#39;json/update.json&#39;,
                dataType: &#39;json&#39;,
                success: function(data){
                    var result = &#39;&#39;;                    
                    for(var i = 0; i < data.lists.length; i++){
                        result +=   &#39;<a class="item opacity" href="&#39;+data.lists[i].link+&#39;">&#39;
                                        +&#39;<img src="&#39;+data.lists[i].pic+&#39;" alt="">&#39;
                                        +&#39;<h3>&#39;+data.lists[i].title+&#39;</h3>&#39;
                                        +&#39;<span class="date">&#39;+data.lists[i].date+&#39;</span>&#39;
                                    +&#39;</a>&#39;;
                    }                    // 为了测试，延迟1秒加载
                    setTimeout(function(){
                        $(&#39;.lists&#39;).html(result);                        // 每次数据加载完，必须重置
                        dropload.resetload();
                    },1000);
                },
                error: function(xhr, type){
                    alert(&#39;Ajax error!&#39;);                    // 即使加载出错，也得重置
                    dropload.resetload();
                }
            });
        },
        loadDownFn : function(me){
            $.ajax({
                type: &#39;GET&#39;,
                url: &#39;json/more.json&#39;,
                dataType: &#39;json&#39;,
                success: function(data){
                    var result = &#39;&#39;;                    
                    for(var i = 0; i < data.lists.length; i++){
                        result +=   &#39;<a class="item opacity" href="&#39;+data.lists[i].link+&#39;">&#39;
                                        +&#39;<img src="&#39;+data.lists[i].pic+&#39;" alt="">&#39;
                                        +&#39;<h3>&#39;+data.lists[i].title+&#39;</h3>&#39;
                                        +&#39;<span class="date">&#39;+data.lists[i].date+&#39;</span>&#39;
                                    +&#39;</a>&#39;;
                    }                    // 为了测试，延迟1秒加载
                    setTimeout(function(){
                        $(&#39;.lists&#39;).append(result);                        // 每次数据加载完，必须重置
                        dropload.resetload();
                    },1000);
                },
                error: function(xhr, type){
                    alert(&#39;Ajax error!&#39;);                    // 即使加载出错，也得重置
                    dropload.resetload();
                }
            });
        }
    });
});

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