thinkphp+ajaxfileupload 非同步上傳圖片
阿新 • • 發佈：2019-01-09
藉助外掛實現非同步上傳圖片的，需要引用Jquery。
HTML：
<a onclick="selectImg(this)">照片</a>
<input type="file" id="file{$voc.id}" name="file{$voc.id}" onchange="ajaxFileUpload(this.id)"
accept="image/*" style="display: none;" />
<input type="hidden" id="hd{$voc.id}" name="hd{$voc.id}" />一個a連線供選擇照片，觸發file的click事件，
注意：
如果用jq的on方法，只能觸發一次選擇圖片，所以，應該把事件直接寫在file本身。
file標籤一定要有name屬性，不然提示“未上傳圖片”
JS事件：
觸發file的click事件：
function selectImg(obj){
$(obj).next().click();
}function ajaxFileUpload(file_id) { $.ajaxFileUpload ( { url: '{:U("Wap/Home/uploadImg")}', //用於檔案上傳的伺服器端請求地址 secureuri: false, //是否需要安全協議，一般設定為false fileElementId: file_id, //檔案上傳域的ID dataType: 'json', //返回值型別 一般設定為json success: function (data, status) //伺服器成功響應處理函式 { $("#"+file_id).parent().find("span").remove();//多次上傳時，移除舊的，再新增新的 $("#"+file_id).parent().append("<span onclick='viewImg(this)'>檢視</span>"); $("#"+file_id).parent().find("input[type=hidden]").val("__ROOT__/Uploads/"+data.imgurl); if (typeof (data.error) != 'undefined') { if (data.error != '') { alert(data.error); } else { alert(data.msg); } } }, error: function (data, status, e)//伺服器響應失敗處理函式 { alert(e); } } ); return false; }
輔助js程式碼，就是全屏檢視圖片，點選圖片關閉預覽：
JS部分：
function hideContainer(){
$("#img_container").hide();
}
function viewImg(obj){
var url=$(obj).prev().val();
$("#img_container img").attr("src", url);
$("#img_container").show();
}<div id="img_container" style="width: 100%;height: 1000px;z-index: 999;background-color: #2d2d2d;position: absolute;top:0px;left: 0px;display: none;"> <img style="width: 100%;" src="" onclick="hideContainer()" > </div>
伺服器接收非同步提交的圖片：
function uploadImg(){
$config = array(
'maxSize' => 3145728,
'rootPath' => './Uploads/',
'savePath' => '',
'saveName' => array('uniqid',''),
'exts' => array('jpg', 'gif', 'png', 'jpeg'),
'autoSub' => true,
'subName' => array('date','Ymd'),
);
$upload = new \Think\Upload($config);
// 上傳檔案
$info = $upload->upload();
if(!$info) {// 上傳錯誤提示錯誤資訊
echo "{\"error\":\"".$upload->getError()."\"}";
}else{// 上傳成功 獲取上傳檔案資訊
foreach($info as $file){
echo "{\"imgurl\":\"".$file['savepath'].$file['savename']."\"}";
}
}
}TP的方法，竟然不會自動建立根目錄的資料夾，好奇怪。
最後附上能用js外掛原始碼：
jQuery.extend({
handleError: function( s, xhr, status, e ) {
// If a local callback was specified, fire it
if ( s.error ) {
s.error.call( s.context || s, xhr, status, e );
}
// Fire the global callback
if ( s.global ) {
(s.context ? jQuery(s.context) : jQuery.event).trigger( "ajaxError", [xhr, s, e] );
}
},
createUploadIframe: function(id, uri)
{
//create frame
var frameId = 'jUploadFrame' + id;
var iframeHtml = '<iframe id="' + frameId + '" name="' + frameId + '" style="position:absolute; top:-9999px; left:-9999px"';
if(window.ActiveXObject)
{
if(typeof uri== 'boolean'){
iframeHtml += ' src="' + 'javascript:false' + '"';
}
else if(typeof uri== 'string'){
iframeHtml += ' src="' + uri + '"';
}
}
iframeHtml += ' />';
jQuery(iframeHtml).appendTo(document.body);
return jQuery('#' + frameId).get(0);
},
createUploadForm: function(id, fileElementId, data)
{
//create form
var formId = 'jUploadForm' + id;
var fileId = 'jUploadFile' + id;
var form = jQuery('<form action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>');
if(data)
{
for(var i in data)
{
jQuery('<input type="hidden" name="' + i + '" value="' + data[i] + '" />').appendTo(form);
}
}
var oldElement = jQuery('#' + fileElementId);
var newElement = jQuery(oldElement).clone();
jQuery(oldElement).attr('id', fileId);
jQuery(oldElement).before(newElement);
jQuery(oldElement).appendTo(form);
//set attributes
jQuery(form).css('position', 'absolute');
jQuery(form).css('top', '-1200px');
jQuery(form).css('left', '-1200px');
jQuery(form).appendTo('body');
return form;
},
ajaxFileUpload: function(s) {
// TODO introduce global settings, allowing the client to modify them for all requests, not only timeout
s = jQuery.extend({}, jQuery.ajaxSettings, s);
var id = new Date().getTime()
var form = jQuery.createUploadForm(id, s.fileElementId, (typeof(s.data)=='undefined'?false:s.data));
var io = jQuery.createUploadIframe(id, s.secureuri);
var frameId = 'jUploadFrame' + id;
var formId = 'jUploadForm' + id;
// Watch for a new set of requests
if ( s.global && ! jQuery.active++ )
{
jQuery.event.trigger( "ajaxStart" );
}
var requestDone = false;
// Create the request object
var xml = {}
if ( s.global )
jQuery.event.trigger("ajaxSend", [xml, s]);
// Wait for a response to come back
var uploadCallback = function(isTimeout)
{
var io = document.getElementById(frameId);
try
{
if(io.contentWindow)
{
xml.responseText = io.contentWindow.document.body?io.contentWindow.document.body.innerHTML:null;
xml.responseXML = io.contentWindow.document.XMLDocument?io.contentWindow.document.XMLDocument:io.contentWindow.document;
}else if(io.contentDocument)
{
xml.responseText = io.contentDocument.document.body?io.contentDocument.document.body.innerHTML:null;
xml.responseXML = io.contentDocument.document.XMLDocument?io.contentDocument.document.XMLDocument:io.contentDocument.document;
}
}catch(e)
{
jQuery.handleError(s, xml, null, e);
}
if ( xml || isTimeout == "timeout")
{
requestDone = true;
var status;
try {
status = isTimeout != "timeout" ? "success" : "error";
// Make sure that the request was successful or notmodified
if ( status != "error" )
{
// process the data (runs the xml through httpData regardless of callback)
var data = jQuery.uploadHttpData( xml, s.dataType );
// If a local callback was specified, fire it and pass it the data
if ( s.success )
s.success( data, status );
// Fire the global callback
if( s.global )
jQuery.event.trigger( "ajaxSuccess", [xml, s] );
} else
jQuery.handleError(s, xml, status);
} catch(e)
{
status = "error";
jQuery.handleError(s, xml, status, e);
}
// The request was completed
if( s.global )
jQuery.event.trigger( "ajaxComplete", [xml, s] );
// Handle the global AJAX counter
if ( s.global && ! --jQuery.active )
jQuery.event.trigger( "ajaxStop" );
// Process result
if ( s.complete )
s.complete(xml, status);
jQuery(io).unbind()
setTimeout(function()
{ try
{
jQuery(io).remove();
jQuery(form).remove();
} catch(e)
{
jQuery.handleError(s, xml, null, e);
}
}, 100)
xml = null
}
}
// Timeout checker
if ( s.timeout > 0 )
{
setTimeout(function(){
// Check to see if the request is still happening
if( !requestDone ) uploadCallback( "timeout" );
}, s.timeout);
}
try
{
var form = jQuery('#' + formId);
jQuery(form).attr('action', s.url);
jQuery(form).attr('method', 'POST');
jQuery(form).attr('target', frameId);
if(form.encoding)
{
jQuery(form).attr('encoding', 'multipart/form-data');
}
else
{
jQuery(form).attr('enctype', 'multipart/form-data');
}
jQuery(form).submit();
} catch(e)
{
jQuery.handleError(s, xml, null, e);
}
jQuery('#' + frameId).load(uploadCallback );
return {abort: function () {}};
},
uploadHttpData: function( r, type ) {
var data = !type;
data = type == "xml" || data ? r.responseXML : r.responseText;
// If the type is "script", eval it in global context
if ( type == "script" )
jQuery.globalEval( data );
// Get the JavaScript object, if JSON is used.
if ( type == "json" )
eval( "data = " + data );
// evaluate scripts within html
if ( type == "html" )
jQuery("<div>").html(data).evalScripts();
return data;
}
})
