基於zepto.js實作仿手機QQ空間的大圖檢視元件ImageView.js詳解_javascript技巧

呼叫方式 :ImageView(index,imgData)  --index參數 為圖片預設顯示的索引值，類型 為Number  --imaData參數 為圖片url陣列 ，類型為Array

使用之前要先引入 zepto.js 檔案

ImageView.js具體程式碼如下：

複製程式碼 程式碼如下:

/*
 * ImageView v1.0.0
 * --基於zepto.js的大圖檢視
 * --呼叫方法 ImageView(index,imgDada)
 * --index 圖片預設值顯示索引,Number  --imgData 圖片url陣列,Array
 * */
var ImageView=(function(window,$){
    var _this=$("#slideView"),_ImgData=[],_index=0,_length=0,
        _start=[],_org=[],_orgTime=null,
        _lastTapDate=null,
        _zoom=1,_zoomXY=[0,0],_transX=null,
        _advancedSupport = false,
        _doubleDistOrg=1,_doubleZoomOrg=1,isDoubleZoom = false,
        isSlide=true,isDrag=false,timer=null,
        winW=window.innerWidth,winH=window.innerHeight;
    /**
     * 事件物件 event
    */
    var Event={
        touchstart:function(e){
            e.preventDefault();
            if (_advancedSupport && e.touches && e.touches.length >= 2) {
                var img = getImg();
                $(img).css({"-webkit-transitionDuration": "0ms","transitionDuration": "0ms"});
                _doubleZoomOrg = _zoom;
                _doubleDistOrg = getDist(e.touches[0].pageX, e.touches[0].pageY, e.touches[1].pageX, e.touches[1].pageY                 isDoubleZoom = true;
                return
            }
            e = e.touches ? e.touches[0] : e;
            isDoubleZoom = false;
            _start = [e.pageX, e.pageY];
            _org = [e.pageX, e.pageY];
            _orgTime = Date.now();
            _transX = -_index * winW;
            if(_zoom!=1){
                _zoomXY = _zoomXY || [0, 0];
                _orgZoomXY = [_zoomXY[0], _zoomXY[1]];
                var img = getImg();
                img&&($(img).css({"-webkit-transitionDuration": "0ms","transitionDuration": "0ms"}));
                isDrag = true
            }else{
                _this.find(".pv-inner").css({"-webkit-transitionDuration":"0ms","transitionDuration":"0ms"});
;
;             }
        },
        touchmove:function(e){
            e.preventDefault();
            if (_advancedSupport && e.touches && e.touches.length >= 2) {
                var newDist = getDist(e.touches[0].pageX, e.touches[0].pageY, e.touches[1].pageX, e.touches[                var img = getImg();
                $(img).css({"-webkit-transitionDuration": "0ms","transitionDuration": "0ms"});
                if (_zoom                     _zoom = 1;
                    _zoomXY = [0, 0];
                    $(img).css({"-webkit-transitionDuration": "200ms","transitionDuration": "200ms"})
                } else if (_zoom > getScale(img) * 2){
                     _zoom = getScale(img) * 2;
                }
                $(img).css({"-webkit-transform": "scale(" _zoom ") 翻譯(" _zoomXY[0] "px," _zoomXY[1] "px)","transform": "scale(" _zoom ") 翻譯(" _zoomXY[0] "px," _zoomXY[1] "px)"});
                返回
            }
            if (isDoubleZoom){
                返回；
            }
            e = e.touches ? e.touches[0] : e;
            if (_zoom != 1) {
                var deltaX = (e.pageX - _start[0]) / _zoom;
                var deltaY = (e.pageY - _start[1]) / _zoom;
                _start = [e.pageX, e.pageY];
                var img = getImg();
                var newWidth = img.clientWidth *_zoom,
                    newHeight = img.clientHeight * _zoom;
                var borderX = (newWidth - winW) / 2 / _zoom,
                    borderY = (newHeight - winH) / 2 / _zoom;
                (borderX >= 0)&&(_zoomXY[0] borderX)&&(deltaX /= 3);
                (borderY > 0)&&(_zoomXY[1] borderY)&&(deltaY /= 3);
                _zoomXY[0] = deltaX;
                _zoomXY[1] = deltaY;
                (_length == 1 && newWidth                 (_length == 1 && newHeight                 $(img).css({"-webkit-transform": "scale(" _zoom ") 翻譯(" _zoomXY[0]
                    "px," _zoomXY[1] "px)","transform": "scale(" _zoom ") 翻譯(" _zoomXY[0]
                    "px," _zoomXY[1] "px)"})
            }其他{
                if (!isSlide) return;
                var deltaX = e.pageX - _start[0];
                (_transX > 0 || _transX                 _transX = -_index * winW deltaX;
                _this.find(".pv-inner").css({"-webkit-transform":"translate(" _transX "px,0px) translateZ(0)"});
            }
        },
        touchend:函數(e){
            if (isDoubleZoom) {
                返回；
            }
            if (_zoom != 1) {
                if (!isDrag){return;}
                var img = getImg();
                var newWidth = img.clientWidth *_zoom,
                    newHeight = img.clientHeight * _zoom;
                var borderX = (newWidth - winW) / 2 / _zoom,
                    borderY = (newHeight - winH) / 2 / _zoom;
                if (_length > 1 && borderX >= 0) {
                    var updateDelta = 0;
                    var switchDelta = winW / 6;
                    if (_zoomXY[0]                         updateDelta = 1;
                    }else if (_zoomXY[0] > borderX switchDelta / _zoom && _index > 0){
                        updateDelta = -1;
                    }
                    if (updateDelta != 0) {
                        縮小(img);
                        changeIndex(_index updateDelta);
                        返回
                    }
                }
                var delta = Date.now() - _orgTime;
                if (delta                     (delta                     var deltaDis = Math.pow(180 / delta, 2);
                    _zoomXY[0] = (_zoomXY[0] - _orgZoomXY[0]) * deltaDis;
                    _zoomXY[1] = (_zoomXY[1] - _orgZoomXY[1]) * deltaDis;
$(img).css({"-webkit-transition": "400ms 三次貝塞爾曲線(0.08,0.65,0.79,1)","transition": "400ms 三次貝塞爾曲線(0.08,0.65,0.79 ,1)" })
                } 其他{
                                $(img).css({"-webkit-transition": "200ms 線性","transition": "200ms 線性"});
;
;
;
;
;
;
;
;                 }
                if (borderX >= 0){
                    if (_zoomXY[0]                        _zoomXY[0] = -borderX;
                    }否則 if (_zoomXY[0] > borderX){
                       _zoomXY[0] = borderX;
                    }
                }
                if (borderY > 0){
                    if (_zoomXY[1]                        _zoomXY[1] = -borderY;
                    }否則 if (_zoomXY[1] > borderY){
                       _zoomXY[1] = borderY;
                    }
                }
                if (Math.abs(_zoomXY[0]) $(img).css({"-webkit-transform": "scale(" _zoom ") 翻譯(0px," _zoomXY[1] "px)","transform": "scale(" _zoom ") 翻譯(0px ," _zoomXY[1] "px)"});
                   且返回
                } 其他{
$(img).css({"-webkit-transform": "scale(" _zoom ") 翻譯(" _zoomXY[0] "px," _zoomXY[1] "px)","transform": "scale(" _zoom ") 翻譯(" _zoomXY[0] "px," _zoomXY[1] "px)"});
                }
                isDrag = false             }其他{                 if (!isSlide){ return;}                 var deltaX = _transX - -_index * winW;                 var updateDelta = 0;                 若 (deltaX > 50){                     updateDelta = -1;                }否則為 if(deltaX                     updateDelta = 1;
                }
                _index=_index updateDelta;
                變更索引(_index);
                isSlide =false
            }
        },
        點選：函數（e）{
            _zoom=1;
            _zoomXY=[0,0];
            _this.css("不透明度","0");
            計時器=setTimeout(function(){
                _this.css({"display":""}).html("");
                解除綁定();
            },150)
        },
        dobelTap:函數(e){
            清除逾時（計時器）；
            var now = 新日期;
            if (現在 - _lastTapDate                 返回；
            }
            _lastTapDate = 現在;
            var img = getImg();
            若 (!img){
                返回；
            }
            if (_zoom != 1){
                縮減(img);
            }其他{
                放大（img）；
            }
        },
        setView:function(e){
            winW=window.innerWidth;
            winH=window.innerHeight;
            _this.width(window.innerWidth).height(window.innerHeight);
            翻譯((-_index*window.innerWidth),0,0,$(".pv-inner")[0]);
            縮小（getImg（））
        }
    };
    var handleEvent=function(e){
        開關（e.type）{
            案例「touchstart」：
                Event.touchstart(e);
                休息；
            案例「touchmove」：
                Event.touchmove(e);
                休息；
            案例「touchcancel」：
            個案「touchend」：
                Event.touchend(e);
                休息；
            個案「方向改變」：
            個案「調整大小」：
                Event.setView(e);
                休息
        }
    };
    /**
     * 綁定事件
    */
    var bind=function(){
        _this.on("singleTap",function(e){
            e.preventDefault();
            var now = 新日期;
            if (現在 - _lastTapDate                 返回;           
            }
            _lastTapDate = 現在;
            Event.click(e);
            回復錯誤；
        }).on("doubleTap", function(e) {
            e.preventDefault();
            Event.dobelTap(e);
            回復錯誤；
        });
        _this.on("touchstart touchmove touchend touchcancel", function(e) {
            處理事件(e);
        });
        Event.setView();
        視窗中的「onorientationchange」？ window.addEventListener("orientationchange",Event.setView,false) : window.addEventListener("resize",Event.setView,false);
    };
    /**
     * 解除事件
    */
    var unbind= function() {
         _this.off();
        視窗中的「onorientationchange」？ window.removeEventListener("orientationchange",Event.setView, false) : window.removeEventListener("resize",Event.setView, false)
    };
    var getDist= function(x1, y1, x2, y2) {
        return Math.sqrt(Math.pow(x2 - x1, 2) Math.pow(y2 - y1, 2), 2)
    }
    /**
     * 圖片縮放
    */
    var getScale=function(img) {
        var h = img.naturalHeight, w = img.naturalWidth,
        比例=w*h/(img.clientHeight*img.clientWidth);
        回報比例；
    };
    var scaleUp=函數(img) {
        var scale = getScale(img);
        若（規模> 1）
$(img).css({"-webkit-transform": "scale("scale")","transform": "scale("scale")","-webkit-transition": "200ms","transition ": "200ms"});
        _zoom = 比例；
    };
    var scaleDown=函數(img) {
        _zoom = 1;
        _zoomXY = [0, 0];
        _doubleDistOrg = 1;
        _doubleZoomOrg = 1;
$(img).css({"-webkit-transform": "scale(1)","transform": "scale(1)","-webkit-transition": "200ms","transition": "200ms “});
    };
    /**
     * 滑動效果
     * dist
    */
    var 翻譯 = 函數( distX,distY,speed,ele) {
        if( !!ele ){ ele=ele.style; }else{ return; }
        ele.webkitTransitionDuration =  ele.MozTransitionDuration = ele.msTransitionDuration = ele.OTransitionDuration = ele.transitionDuration =  speed + 'ms';
        ele.webkitTransform = 'translate(' + distX + 'px,'+distY+'px)' + 'translateZ(0)';
        ele.msTransform = ele.MozTransform = ele.OTransform = 'translateX(' + distX + 'px) translateY(' + distY + 'px)';
    };
    /**
     * 更改索引值 _index
     */
    var changeIndex=function(index,force){
        if (index             index = 0;
        }else if(index >= _length){
            index =_length - 1;
        }
        _index = index;
        translate((-_index*window.innerWidth),0,force? "0" : "200" ,$(".pv-inner")[0]);
        $("#J_index").html(_index+1+"/"+_length);
        imgLoad();
    }
    /**
     * 图片获取
     */
    var getImg=function(index) {
        var img = _this.find("li").eq(index || _index).find("img");
        if (img.size() == 1){
            return img[0];
        }else{
            return null
        }
    }
    /**
     * 图片加载
     */
    var imgLoad=function(){
        if($(".pv-img").eq(_index).find("img")[0]){
            $("#J_loading").css("display","");
            return;
        }else{
            $("#J_loading").css("display","block");
            var tempImg=new Image(),w,h,set;
            tempImg.src=_ImgData[_index];
            $(".pv-img").eq(_index)[0].appendChild(tempImg);
            tempImg.onload=function(){
                $("#J_loading").css("display","");
            }
        }
    };
    /**
     * 创建大图查看Dome结构
     */
    var Create=function(){
        _this.append("

").append("

"+(_index+1)+"/"+_length+"

").append("")
        for(var i=0;i<_length>             $(".pv-inner").append("

")
        }
        imgLoad();
    };
    /**
     * 大图查看初始化
     */
    var init=function(){
        !!_this[0]||$("body").append("

");
        _this=$("#slideView");
        ($.os.iphone || $.os.android && parseFloat($.os.version) >= 4)&&(_advancedSupport = true);
    }();
    /**
     * 大圖檢視回傳介面函數
     * ImageView(index,data)
     * index 初始指標值 nubmer
     * data 圖片陣列 array
    */
    var ImageView=function(index,data){
        _ImgData=data;
        _index=index;
        _length=data.length;
        //建立dom結構
        Create();
        //dom結構顯示
        _this.css("display","block");
        //綁定事件
        bind();
    }
    return ImageView;
})(window,Zepto);

　　

ImageView.js用到的css程式碼如下：

複製程式碼 程式碼如下:

/*大圖查看*/
.slide-view {背景：#000；位置：固定；寬度：100%；高度：100%；溢出：隱藏；頂部：0；左：0；z-index：100；不透明度：0；顯示：無; -webkit-animation:fadeIn .2s 線性前進;animation:fadeIn .2s 線性前進;-webkit-touch-callout: none;-webkit-transform-style:preserve-3d; }
.slide-view .counts {位置：絕對；頂部：5%；左：0；右：0；文字對齊：中心；字體大小：0；-webkit-transform-style：保留-3d； }
.slide-view .counts .value {邊框半徑：9px；行高：18px；填滿：0 6px；字體大小：11px；顯示：內聯塊；背景顏色：rgba(102,102,102,.6);顏色：#f1f1f1 ;}
.pv-inner {位置：相對；z-index：-1；顯示：-webkit-box；顯示：box；寬度：100％；高度：100％；-webkit-transition：全部350ms線性；-webkit-backface -可見性：隱藏；過渡：全部350 毫秒線性；背面可見性：隱藏；-webkit-touch-callout：無；-webkit-transform-style：保留3d； }
.pv-inner li {文字對齊：中心；顯示：-webkit-box；顯示：框；-webkit-box-align：中心；溢出：隱藏；寬度：100％；高度：100％；-webkit-touch - callout：無；背面可見性：隱藏；-webkit-transform-style：preserve-3d； }
.pv-inner img {最大寬度：97％；最大高度：100％；-webkit-transform：scale（1）translate（0px，0px）;transform：scale（1）translate（0px，0px）;可見性:可見;-webkit-transition: 200ms;transition: 200ms;-webkit-user-select: none;user-select: none;display: block;margin: 0 auto;backface-visibility: hide;-webkit-transform-style ：保留-3d； }
@-webkit-keyframes fadeIn{
    0%{不透明度:0;}
    100%{不透明度:1;}
}
@關鍵影格淡入{
    0%{不透明度:0;}
    100%{不透明度:100%;}
}
/*--------------------正在加載------------------------*/
.ui-loading {位置：絕對；左：50%；上：50%；顯示：無；垂直對齊：中間；字體：0/0 arial；邊距：-5px 0 0 -10px;}
.ui-loading i {顯示：內聯塊；寬度：5px；高度：12px；背景：#fff；垂直對齊：頂部；-webkit-animation：加載旋轉1秒無限線性；動畫：加載旋轉1秒無限線性;}
.ui-loading i {-webkit-animation：loading-spin 1s無限線性;animation：loading-spin 1s無限線性}
.ui-loading i.t2 {邊距：0 3px;-webkit-animation-name：loading-spin-one;animation-name：loading-spin-one}
.ui-loading i.t3 {-webkit-animation-name：loading-spin-two;animation-name：loading-spin-two}
@-webkit-keyframes 載入旋轉 {
    0% {不透明度: 0}
    30% {不透明度: 1;-webkit-transform: scale(1,1.2)}
    60% {不透明度: 0;-webkit-transform: 比例(1)}
    100% {不透明度: 0}
}
@-webkit-keyframes 載入旋轉一 {
    0% {不透明度: 0}
    20% {不透明度: 0}
    50% {不透明度: 1;-webkit-transform: scale(1,1.2)}
    80% {不透明度: 0;-webkit-transform: 比例(1)}
    100% {不透明度: 0}
}
@-webkit-keyframes 載入旋轉兩個 {
    0% {不透明度: 0}
    40% {不透明度: 0}
    70% {不透明度: 1;-webkit-transform: scale(1,1.2)}
    100% {不透明度: 0;-webkit-transform: 比例(1)}
}
@keyframes 加載旋轉 {
    0% {不透明度: 0}
    30% {不透明度: 1;變換: 比例(1,1.2)}
    60% {不透明度: 0;變換: 比例(1)}
    100% {不透明度: 0}
}
@keyframes 載入旋轉一 {
    0% {不透明度: 0}
    20% {不透明度: 0}
    50% {不透明度: 1;變換: 比例(1,1.2)}
    80% {不透明度: 0;變換: 比例(1)}
    100% {不透明度: 0}
}
@keyframes 加載旋轉兩個 {
    0% {不透明度: 0}
    40% {不透明度: 0}
    70% {不透明度: 1;變換: 比例(1,1.2)}
    100% {不透明度: 0;變換: 比例(1)}
}
/*--------------------載入結束----------------------*/

ps:程式碼功能比較簡單，可能會有初始化問題。但也能勉強使用

下用的是使用ImageView.js的一個例子：

複製程式碼程式碼如下：

   
       
       
       
   
   
       
       
        <script><br />             ;(function(){<br />                 //取得 html 的圖片元素<br />                 var aImg=document.querySelectorAll("img"),<br />                     aImgSrc=[];<br />                 //為圖片綁定點選事件<br />                 for(var i=0,l=aImg.length;i<l;i ){<br />                     aImg[i].index=i;<br />                     aImg[i].className =" conPic";<br />                     aImgSrc.push(aImg[i].src);<br />                 }<br />                 for(var i=0;i<$(".conPic").length;i ){<br />                     if($(".conPic")[i].complete){<br />                         addTap($(".conPic")[i])<br />                     }else{<br />                         $(".conPic")[i].onload=function(){<br />                             addTap(this);<br />                         }<br />                     }<br />                 }<br />                 為 addTap(obj){<br />                     $(obj).on("tap",function(){<br />                         //則以ImageView<br />                         ImageView($(obj)[0].index,aImgSrc);<br />                     })<br />                 }<br />             })();<br />         </script>
   

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