【发布时间】：2015-02-26 11:16:29
【问题描述】：
在我的 JQM 1.4 + Phonegap 3.6 应用程序中，我使用 listview，如下代码所示。
HTML：
<div id="boardselection">
<ul id="modelsListview" data-role="listview" data-icon="false">
</ul>
</div>
JS：
function resetModelsListView(prodata, firsttime, funfeatureOn, specificBrand, specificPro) {
console.log("on passe dans resetModelsListView");
// funfeatureOn = 0;
//debug timer
var time = [];
var dummy;
var i;
var listviewdeferred = $.Deferred();
var optionspro = '';
var optionsbrand = '';
var optionsmodel = '';
var countpros = 0;
var countbrands = 0;
var countmodels = 0;
var chosenmodelListViewHandle = $('#modelsListview');
var chosenbrandSelect = $('#chosenbrand');
optionsmodel += '';
var alreadyusedbrands = [];
prodata.sort(SortByName);
// get previously selected model to reselect it later
//var previouslySelectedModelId =parseInt(chosenmodelSelect.find('li:selected').val());
if (!funfeatureOn) {
prodata.sort(SortByModel);
} else {
prodata.sort(SortByFUN);
}
//populate model list
//~ if (firsttime){
//~ var perfIsChecked = true;
//~ var smallwaveIsChecked = true;
//~ var stepupIsChecked = true;
//~ }else {
var perfIsChecked = $('#checkboxperf').is(":checked");
var smallwaveIsChecked = $('#checkboxsmallwave').is(":checked");
var stepupIsChecked = $('#checkboxstepup').is(":checked");
//~ }
console.log("perfIsChecked, smallwaveIsChecked, stepupIsChecked =");
console.log(perfIsChecked);
console.log(smallwaveIsChecked);
console.log(stepupIsChecked);
//if none checked then no filter
if (!perfIsChecked && !smallwaveIsChecked && !stepupIsChecked) {
perfIsChecked = true;
smallwaveIsChecked = true;
stepupIsChecked = true;
}
for (i = 1; i < prodata.length; ++i) {
if (specificBrand && prodata[i]['brand'] != specificBrand) {
} else if (specificPro && prodata[i]['name'] != specificPro) {
} else {
if (prodata[i]['fun'] == 0 && perfIsChecked) {
optionsmodel += '<li><a class="optionfuninit" href="#" data-proid="' + prodata[i]['id'] + '"><div class="listviewtexts"><span class="listviewtextsmodel">' + prodata[i]['model'] + '</span> - <span class="listviewtextspro">as surfed by ' + prodata[i]['name'] + '</span></div></a></li>';
} else if (prodata[i]['fun'] == 1 && smallwaveIsChecked) {
optionsmodel += '<li><a class="optionfuninit" href="#" data-proid="' + prodata[i]['id'] + '"><div class="listviewtexts"><span class="listviewtextsmodel">' + prodata[i]['model'] + '</span> - <span class="listviewtextspro">as surfed by ' + prodata[i]['name'] + '</span></div></a></li>';
} else if (prodata[i]['fun'] == 2 && stepupIsChecked) {
optionsmodel += '<li><a class="optionstepupinit" href="#" data-proid="' + prodata[i]['id'] + '"><div class="listviewtexts"><span class="listviewtextsmodel">' + prodata[i]['model'] + '</span> - <span class="listviewtextspro">as surfed by ' + prodata[i]['name'] + '</span></div></a></li>';
} else if (prodata[i]['fun'] == 3 && smallwaveIsChecked) {
optionsmodel += '<li><a class="optionkidsinit" href="#" data-proid="' + prodata[i]['id'] + '"><div class="listviewtexts"><span class="listviewtextsmodel">' + prodata[i]['model'] + '</span> - <span class="listviewtextspro">as surfed by ' + prodata[i]['name'] + '</span></div></a></li>';
}
if (prodata[i]['model'] !== prodata[i - 1]['model']) { //eliminate name duplicates if prodata sorted by model
countmodels = countmodels + 1;
}
}
}
chosenmodelListViewHandle.html(optionsmodel);
if (chosenmodelListViewHandle.listview("option", "disabled")) {
chosenmodelListViewHandle.listview("option", "disabled", false);
}
//~ if (resetModelsOnly) {
//~ if ( !isNaN(previouslySelectedModelId) ) {
//~ chosenmodelListViewHandle.find('li[href="' + previouslySelectedModelId + '"]').attr("selected", "selected").siblings('li').removeAttr('selected');
//~ }
//~ }
//~ highlightFunModels(funfeatureOn, 1);
//~ highlightStepupModels(funfeatureOn, 0);
chosenmodelListViewHandle.listview("refresh", true);
$("#chosenmodel-button").addClass("ui-icon-carat-d ui-btn-icon-right");
if (!funfeatureOn) {
} else {
$('ul#chosenmodel-menu').find("a.ui-btn:contains(SMALL-WAVE)").addClass("optionfun");
$('ul#chosenmodel-menu').find("a.ui-btn:contains(STEP-UP)").addClass("optionstepup");
}
prodata.sort(SortById); //we need this otherwise prodata is not usable by the $('#chosenpro').trigger
$("#chosenmodel-button span").attr({ 'data-i18n': 'select.3' });
$("#boardselection").i18n();
listviewdeferred.resolve();
return listviewdeferred;
}
这会动态显示一长串图像和文本，具体取决于是否选中了过滤器（复选框），而且这个列表生成起来很长，而且在 iOS 中滚动特别困难.... 性能很差。
你能帮我找出提高性能的方法吗？
【问题讨论】：
-
你可以只加载前 10 个项目，然后要么有一个 MORE 按钮不断添加到列表中，要么实现一些分页，这样一次只加载 10 个项目，你有 NEXT 和 PREVIOUS 按钮. 10 是任意的，您的页面大小可能会更大或更小，具体取决于您的项目中最适合的内容。
-
嗨@ezanker，感谢您的评论。我希望不给用户增加更多按钮的负担，所以我想找到一个不涉及添加按钮的解决方案。有没有办法检测列表上的滑动并加载更多项目？
标签： performance cordova jquery-mobile phonegap-build