Angularjs 过滤器页面第一次加载 [英] Angularjs filter page loads first time

问题描述

项目完成时出现了最后一个问题.第一次加载页面时如何避免过滤.

例如:打开电视时选中的页面?(ng-checked="true") 其他便利是假的.如果访客解除电视签到，则过滤器更新.

我的项目:fiddle

angular.module('hotelApp', []).controller('ContentControler', function ($scope, $timeout) {var mapOptions = {缩放:2，中心:新的 google.maps.LatLng(40.0000, -98.0000),mapTypeId: google.maps.MapTypeId.TERRAIN}$scope.location_name = "";$scope.names = [{prop_Name: '位置 1',纬度:43.7000，长:-79.4000，便利设施:'3'}, {prop_Name: '位置 2',纬度:40.6700，长:-73.9400，便利设施:'2'}, {prop_Name: '位置 3',纬度:41.8819，长:-87.6278，便利设施:'4'}, {prop_Name: '位置 4',纬度:34.0500，长:-118.2500，便利设施:'1, 2'}, {prop_Name: '位置 5',纬度:36.0800，长:-115.1522，便利设施:'2, 3'}];$scope.map = new google.maps.Map(document.getElementById('map'), mapOptions);$scope.markers = [];var infoWindow = new google.maps.InfoWindow();var createMarker = 函数(信息){var 标记 = 新的 google.maps.Marker({地图:$scope.map，位置:新 google.maps.LatLng(info.lat, info.long)，标题:info.prop_Name});marker.content = '<div class="infoWindowContent"><ul>'+ '
'+ info.prop_Desc + '
'+ '
'+ info.prop_Addr + '</li>'+ '
'+ info.prop_Price + '</li>'+ '
'+ info.prop_Dist + '</li>'+ '</ul></div>';google.maps.event.addListener(marker, 'click', function () {infoWindow.setContent('<h2>' + marker.title + '</h2>' + marker.content);infoWindow.open($scope.map, 标记);});$scope.markers.push(marker);}for (i = 0; i < $scope.names.length; i++) {createMarker($scope.names[i]);}$scope.openInfoWindow = function (e, selectedMarker) {e.preventDefault();google.maps.event.trigger(selectedMarker, 'click');}//这里是问题过滤器$scope.am_en = function(){x = $(".hosting_amenities input:checkbox:checked").map(function(){return $(this).val();}).get();$scope.ot_Filter = 函数(位置){var shouldBeShown = true;for (var i = 0; i < x.length; i++) {if (location.amenities.indexOf(x[i]) === -1) {shouldBeShown = 假；休息;}}返回 shouldBeShown;};}$scope.$watch('nas',函数(新值，旧值){for (jdx in $scope.markers) {$scope.markers[jdx].setMap(null);}$scope.markers = [];for ($scope.nas 中的 idx) {createMarker($scope.nas[idx]);}}， 真的);});

#map {高度:220px；宽度:400px；}.infoWindowContent {字体大小:14px ！重要；边框顶部:1px 实心 #ccc；填充顶部:10px；}h2{底边距:0；边距顶部:0；}#total_items{边距:0px 自动；填充:0px;文本对齐:居中；颜色:#0B173B；边距顶部:50px;边框:2px 虚线 #013ADF;字体大小:20px；宽度:200px；高度:50px；行高:50px；字体粗细:粗体；}#数量{颜色:#DF7401；字体大小:18px；字体粗细:粗体；}#slider-range{边距:0px 自动；填充:0px;文字对齐:居中；宽度:500px；}

<link href="https://code.jquery.com/ui/1.12.0/themes/smoothness/jquery-ui.css" rel="样式表"/><script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script><script src="https://code.jquery.com/jquery-1.12.4.js"></script><script src="https://maps.googleapis.com/maps/api/js?key=&sensor=false&extension=.js"></script><div ng-app="hotelApp" ng-controller="ContentControler"><div id="地图"></div><div id="class" ng-repeat="标记中的标记"></div><ul><li ng-repeat="x in nas = (names | filter:ot_Filter)">{{ x.prop_Name }}</li><div class="hosting_amenities"><h3>过滤器:</h3><input type="checkbox" name="more_filter[]" value="1" ng-checked="false">WIFI<input type="checkbox" name="more_filter[]" value="2" ng-checked="true">TV<input type="checkbox" name="more_filter[]" value="3" ng-checked="false">有线电视<input type="checkbox" name="more_filter[]" value="4" ng-checked="false">Klima<button ng-click="am_en();">提交</button>

解决方案

目前，您只能在按下提交"按钮后才能更改过滤器.但是，我建议您删除它，并将函数 ot_Filter 放在单击它时触发的函数之外.这将使加载页面时的初始过滤成为可能.

作为下一步，我将使用 ng-model 而不是 ng-checked:

WIFI<input type="checkbox" name="more_filter[]" value="2" ng-model="ot_Checkboxes['tv']">TV<input type="checkbox" name="more_filter[]" value="3" ng-model="ot_Checkboxes['cableTV']">有线电视<input type="checkbox" name="more_filter[]" value="4" ng-model="ot_Checkboxes['klima']">Klima

属性将在您的 javascript 中初始化:

$scope.ot_Checkboxes = {'wifi':假，'电视':真的，'有线电视':假，'klima': 假};

通过这些更改，您的代码将自动更新您的位置.这是一个很好的做法，您可以很好地控制您的元素.您可以在这个答案

中找到有关如何正确设置的更多信息

为了让您看到它的样子，我修改了您的小提琴 此处

There was a final problem when the project finished. How to avoid filtering when page loads first time.

For example : Opening page with TV checked ? (ng-checked="true") Other amenities is false. If the visitor lifts the tv checkin, the filter is renewed.

My project : fiddle

angular.module('hotelApp', [])
    .controller('ContentControler', function ($scope, $timeout) {

    var mapOptions = {
        zoom: 2,
        center: new google.maps.LatLng(40.0000, -98.0000),
        mapTypeId: google.maps.MapTypeId.TERRAIN
    }
    $scope.location_name = "";
    $scope.names = [{
        prop_Name: 'Location 1',
        lat: 43.7000,
        long: -79.4000,
        amenities: '3'
    }, {
        prop_Name: 'Location 2',
        lat: 40.6700,
        long: -73.9400,
        amenities: '2'
    }, {
        prop_Name: 'Location 3',
        lat: 41.8819,
        long: -87.6278,
        amenities: '4'
    }, {
        prop_Name: 'Location 4',
        lat: 34.0500,
        long: -118.2500,
        amenities: '1, 2'
    }, {
        prop_Name: 'Location 5',
        lat: 36.0800,
        long: -115.1522,
        amenities: '2, 3'
    }];
    $scope.map = new google.maps.Map(document.getElementById('map'), mapOptions);

    $scope.markers = [];

    var infoWindow = new google.maps.InfoWindow();

    var createMarker = function (info) {

        var marker = new google.maps.Marker({
            map: $scope.map,
            position: new google.maps.LatLng(info.lat, info.long),
            title: info.prop_Name
        });
        marker.content = '<div class="infoWindowContent"><ul>' + '<li>' + info.prop_Desc + '</li>' + '<li>' + info.prop_Addr + '</li>' + '<li>' + info.prop_Price + '</li>' + '<li>' + info.prop_Dist + '</li>' + '</ul></div>';

        google.maps.event.addListener(marker, 'click', function () {
            infoWindow.setContent('<h2>' + marker.title + '</h2>' + marker.content);
            infoWindow.open($scope.map, marker);
        });

        $scope.markers.push(marker);

    }

    for (i = 0; i < $scope.names.length; i++) {
        createMarker($scope.names[i]);
    }

    $scope.openInfoWindow = function (e, selectedMarker) {
        e.preventDefault();
        google.maps.event.trigger(selectedMarker, 'click');
    }

//PROBLEM FILTER HERE   
$scope.am_en = function()
{
  x = $(".hosting_amenities input:checkbox:checked").map(function(){return $(this).val();}).get();
  $scope.ot_Filter = function (location) {
  	var shouldBeShown = true;
  	for (var i = 0; i < x.length; i++) {
    		if (location.amenities.indexOf(x[i]) === -1) {
        		shouldBeShown = false;
            break;
        }
    }
  	return shouldBeShown;
  };
}



    $scope.$watch('nas',
    function (newValue, oldValue) {
        for (jdx in $scope.markers) {
            $scope.markers[jdx].setMap(null);
        }
        $scope.markers = [];
        for (idx in $scope.nas) {
            createMarker($scope.nas[idx]);
        }
    }, true);
});

#map {
  height: 220px;
  width: 400px;
}

.infoWindowContent {
  font-size: 14px !important;
  border-top: 1px solid #ccc;
  padding-top: 10px;
}

h2 {
  margin-bottom: 0;
  margin-top: 0;
}
#total_items
{
	margin:0px auto;
	padding:0px;
	text-align:center;
	color:#0B173B;
	margin-top:50px;
	border:2px dashed #013ADF;
	font-size:20px;
	width:200px;
	height:50px;
	line-height:50px;
	font-weight:bold;
}
#amount
{
	color:#DF7401;
	font-size:18px;
	font-weight:bold;
}
#slider-range
{
	margin:0px auto;
	padding:0px;
	text-align:center;
	width:500px;
}

<link href="https://code.jquery.com/ui/1.12.0/themes/smoothness/jquery-ui.css" rel="stylesheet"/>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://maps.googleapis.com/maps/api/js?key=&sensor=false&extension=.js"></script>
<div ng-app="hotelApp" ng-controller="ContentControler">
<div id="map"></div>
    <div id="class" ng-repeat="marker in markers"></div>
    <ul>
        <li ng-repeat="x in nas = (names | filter:ot_Filter)">{{ x.prop_Name }}</li>
    </ul>
    
    
<div class="hosting_amenities">
<h3>Filter:</h3>
<input type="checkbox" name="more_filter[]" value="1" ng-checked="false">WIFI
 <input type="checkbox" name="more_filter[]" value="2" ng-checked="true">TV
<input type="checkbox" name="more_filter[]" value="3" ng-checked="false">Cable TV
<input type="checkbox" name="more_filter[]" value="4" ng-checked="false">Klima 
<button ng-click="am_en();">Submit</button>
</div>

解决方案

Currently, you only change the filter once you press the button Submit. However, I recommend you to remove that and place the function ot_Filter outside of the function triggered when you click it. This will make the initial filtering when you load the page possible.

As the next step, I would use ng-model instead of ng-checked:

<input type="checkbox" name="more_filter[]" value="1" ng-model="ot_Checkboxes['wifi']">WIFI
<input type="checkbox" name="more_filter[]" value="2" ng-model="ot_Checkboxes['tv']">TV
<input type="checkbox" name="more_filter[]" value="3" ng-model="ot_Checkboxes['cableTV']">Cable TV
<input type="checkbox" name="more_filter[]" value="4" ng-model="ot_Checkboxes['klima']">Klima

The properties would be initialized in your javascript:

$scope.ot_Checkboxes = {
    'wifi': false,
    'tv': true,
    'cableTV': false,
    'klima': false
};

With these changes your code will update your locations automatically. This is a good practice and you can keep a good control of your elements. You will find more information about how to set this properly in this answer

In order for you to see how it looks like, I modified your fiddle here

这篇关于Angularjs 过滤器页面第一次加载的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！