ajax 延迟显示加载中提示
近期做项目时用到了jquery的ajax,我希望实现“加载时提示用户”的功能,于是先习惯性的度娘谷哥了下,发现按照网上朋友所说的做,每次加载都会提示,不符合我的需求。于是我改进了下,现在如果deferTime内加载成功,则不提示用户,否则就显示加载中图片。
ajaxHelper
var ajaxHelper = (function () { function _judgeAndShowLoadingImg(timeCount, timer, loading, whole, imgPath) { var imgSrc = "<img src='" + imgPath + "' border='0'/>"; //加载中图片 if (timeCount !== 0) { //如果已经加载成功或加载失败,则清除重复执行并返回 clearInterval(timer); return; } else { $(whole).hide(); $(loading).html(imgSrc).show(); clearInterval(timer); } } return { /** * 设定ajax全局事件,显示加载中、加载失败 示例: <div id="loading" style="border:1px solid red;display:none;"> </div> <div id="whole" > </div> * @param loading 显示信息的层的ID * @param whole 正文所在层的ID * @param deferTime 延迟时间(秒)。如果延迟时间内加载成功,则不显示加载中图片,否则显示 * @param imgPath 加载中图片的路径。如"/Content/Image/Shared/Loading/ico_loading3.gif" * @returns */ showWholeLoading: function (loading, whole, deferTime, imgPath) { var _timeCount = 0, _timer = null; $(loading).ajaxStart(function () { _timeCount = 0; //归位 _timer = setInterval(function () { _judgeAndShowLoadingImg(_timeCount, _timer, loading, whole, imgPath); }, deferTime * 1000); }).ajaxSuccess(function () { _timeCount++; //计数加1,用来判断是否加载成功 $(this).hide(); $(whole).show(); }).ajaxError(function (e, xhr, settings, exception) { _timeCount += 2; //计数加2,用来判断是否加载失败 $(this).html("加载失败:" + exception).show(); $(whole).hide(); }); }, /** * 设置单次ajax的事件,显示加载中、加载失败 示例: <div id="loading" style="border:1px solid red;display:none;"> </div> <div id="whole" > </div> * @param loading 显示信息的层的ID * @param whole 正文所在层的ID * @param deferTime 延迟时间(秒)。如果延迟时间内加载成功,则不显示加载中图片,否则显示 * @param imgPath 加载中图片的路径。如"/Content/Image/Shared/Loading/ico_loading3.gif" * @param setting ajax的参数。包括url、data、type、dataType、success * @returns */ showSingleLoading: function (loading, whole, deferTime, imgPath, setting) { var _timeCount = 0, _timer = null, self = this; $.ajax({ url: setting.url, data: setting.data, type: setting.type || "GET", dataType: setting.dataType, beforeSend: function () { _timeCount = 0; //归位 _timer = setInterval(function () { _judgeAndShowLoadingImg(_timeCount, _timer, loading, whole, imgPath); }, deferTime * 1000); }, error: function (jqXHR, textStatus, exception) { _timeCount += 2; //计数加2,用来判断是否加载失败 $(loading).html("加载失败:" + exception).show(); $(whole).hide(); }, success: function (data) { _timeCount++; //计数加1,用来判断是否加载成功 $(loading).hide(); $(whole).show(); setting.success(data) } }); } } }());
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