苹果 ios 微信浏览器界面 ajax 提交带 file 的 form 总是走error方法

1. 问题

问题出在微信端，而且是苹果机的微信端(苹果你咋这么矫情，安卓正常).；代码还是之前的代码，貌似是苹果升级系统后部分版本出现的 BUG，后来证明确实跟 ios 版本有关，网上也找过类似的解决措施；

2. 解决方法

2.1 添加 async: false（未验证）

function saveUser() {
        $.ajax({
            type:"POST",
            url:"SaveUser.action",
            data:$('#fm').serialize(),
            dataTyep:"JSON",
            async: false, //加上之后不在跳转进error
            success:function(data) {
                var config = confirm("注册成功，是否登陆");
                if(config){
                    window.location.href="Login.action";
                }else{
                    window.location.reload();
                }
            },error:function(){
                alert("系统异常");
            }
        });
    }

修改方法：在ajax里边加上了async: false, 原来是没有加它的，加上然后问题解决了

转：https://blog.csdn.net/bin929/article/details/80183443

2.2 ajaxFileUpload 提交（已验证）

最终采取这种方式处理的

ajaxFileUpload.js文件 ↓

jQuery.extend({

    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);
            }
        }

        /*
        old code
        var oldElement = jQuery('#' + fileElementId);
        var newElement = jQuery(oldElement).clone();
        jQuery(oldElement).attr('id', fileId);
        jQuery(oldElement).before(newElement);
        jQuery(oldElement).appendTo(form);
        */

        /***
         * new code
         * support  multigroup、multi  fileupload
         * by keith
         * 2013-7-11
         * /
         **/

        if(typeof(fileElementId) == 'string'){
            fileElementId = [fileElementId];
        }
        for(var i in fileElementId){
            //按name
            var oldElement = jQuery("input[name="+fileElementId[i]+"]");
            oldElement.each(function() {
                var newElement = jQuery($(this)).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;
    },
    //jquery在1.4以后不支持handleError
    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] );
        }
    }
})

　　　　$.ajaxFileUpload({
                url : '/**/**.do',   //提交的路径
                secureuri : false, // 是否启用安全提交，默认为false
                fileElementId: ["pic1","pic2"],    // file控件name属性!!!不是控件id
                type: 'post',   //当要提交自定义参数时，这个参数要设置成post
                dataType : 'jsonp',
                /* data : {
                    fileName : fileName   //传递参数，用于解析出文件名
                }, // 键:值，传递文件名 */
                success : function(data, status) {

                    //alert("上传成功");

                },
                error : function(data, status) {

                    alert(status);
                }
            });

<input type="file" id="pic1" name="pic1" accept="image/*">
<input type="file" id="pic2" name="pic2" accept="image/*">

本文地址：https://www.cnblogs.com/niceyoo/p/9404694.html

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