SWFUpload多文件上传 文件个数限制 setStats()

使用swfupload仿赶集的图片上传


SWFUpload是一个基于flash与javascript的客户端文件上传组件。



handlers.js文件

完成文件入列队（fileQueued） →
完成选择文件（fileDialogComplete） → 开始上传文件（uploadStart） → 上传处理（uploadProgress） → 上传成功（uploadSuccess） → 上传完成（uploadComplete）  →
列队完成（queueComplete）

如上所示，单选文件顺序执行以上回调函数，需要注意的是选择多个文件，fileQueued、queueComplete只会执行一次，而fileDialogComplet...→ uploadComplete每个文件都执行一次。



参考官方例子完成基本功能后，仿赶集采用iframe的方式

为了实现缩略图预览 以及删除 和上传图片个数的限制

显示缩略图，生成删除缩略图的按钮，


thumbImages为父页面显示缩略图的div

src_s为生成的缩略图地址

src_b为原图地址

serverData是图片上传处理页面返回的数据 成功则以    success|缩略图地址|原图地址   这样的格式返回




[javascript] view plaincopyprint?

function uploadSuccess(file, serverData) { 

    try { 

        var result = serverData.split('|'); 

         

        if(result[0] != 'success') { 

            var progress = new FileProgress(file, this.customSettings.progressTarget); 

            progress.setError(); 

            progress.setStatus(serverData); 

            progress.toggleCancel(false); 

        } else { 

            var progress = new FileProgress(file, this.customSettings.progressTarget); 

            progress.setComplete(); 

            progress.setStatus("上传完成"); 

            progress.toggleCancel(false); 

            var img_url_s = result[1]; 

            var img_url_b = result[2]; 

            addImage(img_url_s,img_url_b); 

        } 

 

    } catch (ex) { 

        this.debug(ex); 

    } 

} 

[code="javascript"]function uploadSuccess(file, serverData) {
try {
var result = serverData.split('|');

if(result[0] != 'success') {
var progress = new FileProgress(file, this.customSettings.progressTarget);
progress.setError();
progress.setStatus(serverData);
progress.toggleCancel(false);
} else {
var progress = new FileProgress(file, this.customSettings.progressTarget);
progress.setComplete();
progress.setStatus("上传完成");
progress.toggleCancel(false);
var img_url_s = result[1];
var img_url_b = result[2];
addImage(img_url_s,img_url_b);
}

} catch (ex) {
this.debug(ex);
}
}







[javascript] view plaincopyprint?

function addImage(src_s,src_b) { 

    var newDiv = parent.document.createElement("div"); 

    newDiv.style.margin = "5px"; 

    newDiv.style.height = "60px"; 

    newDiv.style.width = "80px"; 

    newDiv.style.border = "1px solid #7F9DB9"; 

    newDiv.style.cssFloat = "left"; 

    newDiv.style.styleFloat = "left"; 

    newDiv.style.position = "relative"; 

     

    var newA = parent.document.createElement("a"); 

    newA.className = "delete"; 

    newA.title = "删除"; 

    newA.href = "javascript::"; 

    newA.onclick = function(){delDiv(newDiv);}; 

 

    var newInput_s = parent.document.createElement("input"); 

    newInput_s.type = "hidden"; 

    newInput_s.value = src_s; 

    newInput_s.name = "image_s[]"; 

 

    newA.appendChild(newInput_s); 

 

    var newInput_b = parent.document.createElement("input"); 

    newInput_b.type = "hidden"; 

    newInput_b.value = src_b; 

    newInput_b.name = "image_b[]"; 

 

    newA.appendChild(newInput_b); 

     

    var newImgDiv = parent.document.createElement("div"); 

 

    var newImg = parent.document.createElement("img"); 

    newImg.style.height = "60px"; 

    newImg.style.width = "80px"; 

 

    newImgDiv.appendChild(newImg); 

 

    newDiv.appendChild(newImgDiv); 

    newDiv.appendChild(newA); 

    parent.document.getElementById("thumbImages").appendChild(newDiv); 

 

    if (newImg.filters) { 

        try { 

            newImg.filters.item("DXImageTransform.Microsoft.Alpha").opacity = 0; 

        } catch (e) { 

            // If it is not set initially, the browser will throw an error.  This will set it if it is not set yet.  

            newImg.style.filter = 'progid:DXImageTransform.Microsoft.Alpha(opacity=' + 0 + ')'; 

        } 

    } else { 

        newImg.style.opacity = 0; 

    } 

 

    newImg.onload = function () { 

        fadeIn(newImg, 0); 

    }; 

    newImg.src = src_s; 

} 

 

function fadeIn(element, opacity) { 

    var reduceOpacityBy = 5; 

    var rate = 30;  // 15 fps  

 

 

    if (opacity

        opacity += reduceOpacityBy; 

        if (opacity > 100) { 

            opacity = 100; 

        } 

 

        if (element.filters) { 

            try { 

                element.filters.item("DXImageTransform.Microsoft.Alpha").opacity = opacity; 

            } catch (e) { 

                // If it is not set initially, the browser will throw an error.  This will set it if it is not set yet.  

                element.style.filter = 'progid:DXImageTransform.Microsoft.Alpha(opacity=' + opacity + ')'; 

            } 

        } else { 

            element.style.opacity = opacity / 100; 

        } 

    } 

 

    if (opacity

        setTimeout(function () { 

            fadeIn(element, opacity); 

        }, rate); 

    } 

} 

[code="javascript"]function addImage(src_s,src_b) {
var newDiv = parent.document.createElement("div");
newDiv.style.margin = "5px";
newDiv.style.height = "60px";
newDiv.style.width = "80px";
newDiv.style.border = "1px solid #7F9DB9";
newDiv.style.cssFloat = "left";
newDiv.style.styleFloat = "left";
newDiv.style.position = "relative";

var newA = parent.document.createElement("a");
newA.className = "delete";
newA.title = "删除";
newA.href = "javascript::";
newA.onclick = function(){delDiv(newDiv);};

var newInput_s = parent.document.createElement("input");
newInput_s.type = "hidden";
newInput_s.value = src_s;
newInput_s.name = "image_s[]";

newA.appendChild(newInput_s);

var newInput_b = parent.document.createElement("input");
newInput_b.type = "hidden";
newInput_b.value = src_b;
newInput_b.name = "image_b[]";

newA.appendChild(newInput_b);

var newImgDiv = parent.document.createElement("div");

var newImg = parent.document.createElement("img");
newImg.style.height = "60px";
newImg.style.width = "80px";

newImgDiv.appendChild(newImg);

newDiv.appendChild(newImgDiv);
newDiv.appendChild(newA);
parent.document.getElementById("thumbImages").appendChild(newDiv);

if (newImg.filters) {
try {
newImg.filters.item("DXImageTransform.Microsoft.Alpha").opacity = 0;
} catch (e) {
// If it is not set initially, the browser will throw an error.  This will set it if it is not set yet.
newImg.style.filter = 'progid:DXImageTransform.Microsoft.Alpha(opacity=' + 0 + ')';
}
} else {
newImg.style.opacity = 0;
}

newImg.onload = function () {
fadeIn(newImg, 0);
};
newImg.src = src_s;
}

function fadeIn(element, opacity) {
var reduceOpacityBy = 5;
var rate = 30; // 15 fps


if (opacity  100) {
opacity = 100;
}

if (element.filters) {
try {
element.filters.item("DXImageTransform.Microsoft.Alpha").opacity = opacity;
} catch (e) {
// If it is not set initially, the browser will throw an error.  This will set it if it is not set yet.
element.style.filter = 'progid:DXImageTransform.Microsoft.Alpha(opacity=' + opacity + ')';
}
} else {
element.style.opacity = opacity / 100;
}
}

if (opacity

[javascript] view plaincopyprint?

function queueComplete(numFilesUploaded) { 

    this.setButtonDisabled(false); 

    var stats = this.getStats(); 

    var status = document.getElementById("divStatus"); 

    status.innerHTML = "已上传 " + stats.successful_uploads + " 个文件,还可以上传"+ parseInt(this.settings['file_upload_limit']-stats.successful_uploads) +"个文件"; 

} 

 

function delDiv(mydiv) { 

    mydiv.parentNode.removeChild(mydiv); 

    //swfu参见iframe页面中的 swfu = new SWFUpload(settings);  

    var stats = swfu.getStats(); 

    stats.successful_uploads--; 

    swfu.setStats(stats); 

    var status = document.getElementById("divStatus"); 

    status.innerHTML = "已上传 " + stats.successful_uploads + " 个文件,还可以上传"+ parseInt(swfu.settings['file_upload_limit']-stats.successful_uploads) +"个文件"; 

} 

[code="javascript"]function queueComplete(numFilesUploaded) {
this.setButtonDisabled(false);
var stats = this.getStats();
var status = document.getElementById("divStatus");
status.innerHTML = "已上传 " + stats.successful_uploads + " 个文件,还可以上传"+ parseInt(this.settings['file_upload_limit']-stats.successful_uploads) +"个文件";
}

function delDiv(mydiv) {
mydiv.parentNode.removeChild(mydiv);
//swfu参见iframe页面中的 swfu = new SWFUpload(settings);
var stats = swfu.getStats();
stats.successful_uploads--;
swfu.setStats(stats);
var status = document.getElementById("divStatus");
status.innerHTML = "已上传 " + stats.successful_uploads + " 个文件,还可以上传"+ parseInt(swfu.settings['file_upload_limit']-stats.successful_uploads) +"个文件";
}

可能是由于使用iframe的关系

delDiv函数里的swfu不能用this代替


整体效果如下图：

[img]http://hi.csdn.net/attachment/201201/10/0_1326188578obQf.gif" alt="[/img]



当上传完图片后，再次修改信息时，需要取已经上传了多少个图片，结合到swfupload里

通过php从后台取到已上传的图片路径，通过smarty给到一个js数组里




[javascript] view plaincopyprint?

var img_arr = new Array(); 

{if isset($img_arr)} 

{section name='img_arr' loop=$img_arr} 

img_arr[{$smarty.section.img_arr.index}] = new Array('{$img_arr[img_arr].images_s}','{$img_arr[img_arr].images_b}'); 

{/section} 

{/if} 

[code="javascript"]var img_arr = new Array();
{if isset($img_arr)}
{section name='img_arr' loop=$img_arr}
img_arr[{$smarty.section.img_arr.index}] = new Array('{$img_arr[img_arr].images_s}','{$img_arr[img_arr].images_b}');
{/section}
{/if}

查询swfupload文档得到如下资料


flashReady()

该事件函数是内部事件，因此不能被重写。当SWFupload实例化，加载的FLASH完成所有初始化操作时触发此事件。


于是通过swfupload的settings里设置 swfupload_loaded_handler




[javascript] view plaincopyprint?

swfupload_loaded_handler : loaded, 

[code="javascript"]swfupload_loaded_handler : loaded,

再在handlers.js定义loaded函数




[javascript] view plaincopyprint?

function loaded() { 

    if(img_arr.length != 0) { 

        for( val in img_arr ) { 

            addImageFromDb(img_arr[val][0],img_arr[val][1],this); 

        } 

    } 

} 

[code="javascript"]function loaded() {
if(img_arr.length != 0) {
for( val in img_arr ) {
addImageFromDb(img_arr[val][0],img_arr[val][1],this);
}
}
}


调用addImageFromDb函数 修改已上传的图片数量 并且生成已上传的图片的缩略图




[javascript] view plaincopyprint?

//初始化已经上传过的图片  

function addImageFromDb(src_s,src_b,swfu) { 

     

    var stats = swfu.getStats(); 

    stats.successful_uploads++; 

    swfu.setStats(stats); 

    var status = document.getElementById("divStatus"); 

    status.innerHTML = "已上传" + stats.successful_uploads + "张,还可以上传"+ parseInt(swfu.settings['file_upload_limit']-stats.successful_uploads) +"张"; 

 

    addImage(src_s,src_b); 

} 

[code="javascript"]//初始化已经上传过的图片
function addImageFromDb(src_s,src_b,swfu) {

var stats = swfu.getStats();
stats.successful_uploads++;
swfu.setStats(stats);
var status = document.getElementById("divStatus");
status.innerHTML = "已上传" + stats.successful_uploads + "张,还可以上传"+ parseInt(swfu.settings['file_upload_limit']-stats.successful_uploads) +"张";

addImage(src_s,src_b);
}