一、将圖檔轉成icon碼的實作方式,手動多個
效果圖：
代碼片段：
<!DOCTYPE html>
<html >
<head>
<meta charset="UTF-8">
<meta name="renderer" content="webkit">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>多圖上傳測試</title>
<script type="text/javascript">
//圖檔預覽功能 divViewIdNum 圖檔的id号
function picViewImagesLook(file,divViewIdNum)
{
var viewMaxW = 200;
var viewMaxH = 200;
var div = document.getElementById('look_view'+divViewIdNum);
if (file.files && file.files[0])
{
div.innerHTML ='<img id=look_img_tag_id'+divViewIdNum+'>';
var img = document.getElementById('look_img_tag_id'+divViewIdNum+'');
img.onload = function(){
var rect = picViewZoom(viewMaxW, viewMaxH, img.offsetWidth, img.offsetHeight);
img.width = rect.width;
img.height = rect.height;
//img.style.marginLeft = rect.left+'px';
img.style.marginTop = rect.top+'px';
}
var reader = new FileReader();
reader.onload = function(evt){img.src = evt.target.result;}
reader.readAsDataURL(file.files[0]);
}
else
{
var sFilter='filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale,src="';
file.select();
var src = document.selection.createRange().text;
div.innerHTML = '<img id=look_img_tag_id'+divViewIdNum+'>';
var img = document.getElementById('imghead2');
img.filters.item('DXImageTransform.Microsoft.AlphaImageLoader').src = src;
var rect = picViewZoom(viewMaxW, viewMaxH, img.offsetWidth, img.offsetHeight);
status =('rect:'+rect.top+','+rect.left+','+rect.width+','+rect.height);
div.innerHTML = "<div id=look_div_tag_id"+divViewIdNum+" style='width:"+rect.width+"px;height:"+rect.height+"px;margin-top:"+rect.top+"px;"+sFilter+src+"\"'></div>";
}
}
function picViewZoom( maxWidth, maxHeight, width, height ){
var param = {top:0, left:0, width:width, height:height};
if( width>maxWidth || height>maxHeight )
{
rateWidth = width / maxWidth;
rateHeight = height / maxHeight;
if( rateWidth > rateHeight )
{
param.width = maxWidth;
param.height = Math.round(height / rateWidth);
}else
{
param.width = Math.round(width / rateHeight);
param.height = maxHeight;
}
}
param.left = Math.round((maxWidth - param.width) / 2);
param.top = Math.round((maxHeight - param.height) / 2);
return param;
}
</script>
</head>
<body>
圖檔一
<div>
<div>
<input name="pic_file" onchange="picViewImagesLook(this,5)" type="file"/>
</div>
<div id="look_view5" >
<img src="" alt="" height="200" width="200" style="display:none;"/>
</div>
</div>
圖檔二
<div>
<div>
<input name="pic_file" onchange="picViewImagesLook(this,6)" type="file"/>
</div>
<div id="look_view6" >
<img src="" alt="" height="200" width="200" style="display:none;"/>
</div>
</div>
</body>
</html>
二、使用js的另一種方法一次選中多個圖檔預覽展示
效果圖：
代碼片段：
<!DOCTYPE html>
<html >
<head>
<meta charset="UTF-8">
<meta name="renderer" content="webkit">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>多圖上傳測試</title>
<script type="text/javascript">
var all_picW = "100px";//預覽的寬度
var all_picH = "100px";//預覽的高度
function multiImagePreview(avalue) {
var upMultilImagesObj = document.getElementById("upMultilImages");
var picViewsBox = document.getElementById("picViewsBox");
picViewsBox.innerHTML = "";
var fileList = upMultilImagesObj.files;
for (var i = 0; i < fileList.length; i++) {
picViewsBox.innerHTML += "<div style='float:left' > <img id='img" + i + "' /> </div>";
var picjPreviewInfo = document.getElementById("img"+i);
if (upMultilImagesObj.files && upMultilImagesObj.files[i]) {
//火狐
picjPreviewInfo.style.display = 'block';
picjPreviewInfo.style.width = all_picW;
picjPreviewInfo.style.height = all_picH;
//picjPreviewInfo.src = upMultilImagesObj.files[0].getAsDataURL();
//火狐7+版本,用不了getAsDataURL()
picjPreviewInfo.src = window.URL.createObjectURL(upMultilImagesObj.files[i]);
} else {
//IE
upMultilImagesObj.select();
var picTagSrc = document.selection.createRange().text;
alert(picTagSrc);
var localImagId = document.getElementById("img" + i);
//設定初始大小
localImagId.style.width = all_picW;
localImagId.style.height = all_picH;
//圖檔異常捕捉
try {
localImagId.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale)";
localImagId.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = picTagSrc;
}
catch (e) {
alert("圖檔格式不正确!");
return false;
}
picjPreviewInfo.style.display = 'none';
document.selection.empty();
}
}
return true;
}
</script>
</head>
<body>
<div>
<input type="file" name="file" id="upMultilImages" multiple="multiple" onchange="javascript:multiImagePreview();" accept="image/*" />
<div id="picViewsBox"></div>
</div>
</body>
</html>
最後再給大家推薦一個源碼網站，原創源碼庫，我感覺很不錯，可以找到很多大部分的網站程式，很值得收藏。