上传图片,展示图片。代码可以直接复制使用。
HTML代码
<div id="localImag">
<img id="preview" src="" width="70px" />
</div>
<input class="weui_uploader_input" name="imgUrl" id="doc" type="file" accept="image/jpg,image/jpeg,image/png,image/gif" multiple onChange="javascript:setImagePreview();" />
JS代码
<script type="text/javascript">
function setImagePreview(avalue) {
//input
var docObj = document.getElementById("doc");
//img
var imgObjPreview = document.getElementById("preview");
//div
var divs = document.getElementById("localImag");
if (docObj.files && docObj.files[0]) {
//火狐下,直接设img属性
imgObjPreview.style.display = 'block';
imgObjPreview.style.width = '80px';
imgObjPreview.style.height = '80px';
//imgObjPreview.src = docObj.files[0].getAsDataURL();
//火狐7以上版本不能用上面的getAsDataURL()方式获取,需要一下方式
imgObjPreview.src = window.URL.createObjectURL(docObj.files[0]);
} else {
//IE下,使用滤镜
docObj.select();
var imgSrc = document.selection.createRange().text;
var localImagId = document.getElementById("localImag");
//必须设置初始大小
localImagId.style.width = "100px";
localImagId.style.height = "100px";
//图片异常的捕捉,防止用户修改后缀来伪造图片
try {
localImagId.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale)";
localImagId.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = imgSrc;
} catch(e) {
alert("您上传的图片格式不正确,请重新选择!");
return false;
}
imgObjPreview.style.display = 'none';
document.selection.empty();
}
return true;
}
</script>