AngularJS:显示加载器图像,直到加载数据

时间:2015-12-17 05:37:52

标签: javascript php angularjs

screen image1

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使用angular js + php显示结果,如何在加载数据之前显示加载器图像,这里我的代码写在下面,

如何在数据加载完成之前让AngularJS显示加载图像?

app.js文件

var app = angular.module('myApp3', ['ui.bootstrap']);

app.filter('startFrom', function() {

    return function(input, start) {
        if(input) {
            start = +start; //parse to int
            return input.slice(start);
        }
        return [];
    }
});
app.controller('customersCrtl', function ($scope, $http, $timeout) {
    $http.get('http://www.testurl.com/index.php/site/getprofileLocations').success(function(data){

        $scope.list = data;
        $scope.currentPage = 1; //current page
        $scope.entryLimit = 20; //max no of items to display in a page
        $scope.filteredItems = $scope.list.length; //Initially for no filter  
        $scope.totalItems = $scope.list.length;
    });
    $scope.setPage = function(pageNo) {
        $scope.currentPage = pageNo;
    };
    $scope.filter = function() {
        $timeout(function() { 
            $scope.filteredItems = $scope.filtered.length;
        }, 10);
    };
    $scope.sort_by = function(predicate) {
        $scope.predicate = predicate;
        $scope.reverse = !$scope.reverse;
    };
});

和php代码在这里

<html ng-app="myApp3" ng-app lang="en">


<div ng-controller="customersCrtl">
<div class="content" >

    <div class="row">
        <div class="col-md-2">PageSize:
            <select ng-model="entryLimit" class="form-control">
                <option>5</option>
                <option>10</option>
                <option>20</option>
                <option>50</option>
                <option>100</option>
            </select>
        </div>
        <div class="col-md-3">Filter:
            <input type="text" ng-model="search" ng-change="filter()" placeholder="Filter" class="form-control" />
        </div>
        <div class="col-md-4">
            <h5>Filtered {{ filtered.length }} Of {{ totalItems}} Total Locations</h5>
        </div>
    </div>
    <br/>
    <div class="row">
        <div class="col-md-12" ng-show="filteredItems > 0">
            <table class="table table-striped table-bordered">
            <thead>
            <th>Id&nbsp;<a ng-click="sort_by('id');"><i class="glyphicon glyphicon-sort"></i></a></th>
            <th>Place Name&nbsp;<a ng-click="sort_by('name');"><i class="glyphicon glyphicon-sort"></i></a></th>
            <th>Category ID&nbsp;<a ng-click="sort_by('category_name');"><i class="glyphicon glyphicon-sort"></i></a></th>


            </thead>
            <tbody>
                <tr ng-repeat="data in filtered = (list | filter:search | orderBy : predicate :reverse) | startFrom:(currentPage-1)*entryLimit | limitTo:entryLimit">
                   <td>{{data.id}}</td>
                    <td>{{data.name}}</td>
                    <td>{{data.category_name}}</td>



                </tr>
            </tbody>
            </table>
        </div>
        <div class="col-md-12" ng-show="filteredItems == 0">
            <div class="col-md-12">
                <h4>No Locations found</h4>
            </div>
        </div>
        <div class="col-md-12" ng-show="filteredItems > 0">    
            <div pagination="" page="currentPage" on-select-page="setPage(page)" boundary-links="true" total-items="filteredItems" items-per-page="entryLimit" class="pagination-small" previous-text="&laquo;" next-text="&raquo;"></div>


        </div>
    </div>
</div>
</div>

<script src="<?php echo Yii::app()->baseUrl; ?>/angular/js/angular.min.js"></script>
<script src="<?php echo Yii::app()->baseUrl; ?>/angular/js/ui-bootstrap-tpls-0.10.0.min.js"></script>
<script src="<?php echo Yii::app()->baseUrl; ?>/angular/app/app.js"></script>

</html>

6 个答案:

答案 0 :(得分:18)

显示加载器onload并在加载数据后隐藏它。

$scope.showLoader = true;
$http.get('http://www.testurl.com/index.php/site/getprofileLocations').success(function(data){
    $scope.showLoader = false;
    // rest of your code
});

编辑:来自赛义德答案的HTML代码

<div ng-show="showLoader"><!-- so this div containing img will be dislpayed only when the showLoader is equal to true-->
    <img src="source"> <!-- or any other spinner -->
</div>

答案 1 :(得分:1)

除了@Venugopal的回答。 在html中显示加载图像

<div ng-show="showLoader"><!-- so this div containing img will be dislpayed only when the showLoader is equal to true-->
  <img src="source"> <!-- or any other spinner -->
</div>

答案 2 :(得分:0)

您需要在ajax调用之前显示加载程序映像,并在成功和错误处理程序中完成后将其删除。

你会在网上找到大量的装载机图像,你可以将它用于你的应用程序。

JS CODE

 //show the loader image in center of screen & prevent any user interactions
 $scope.imLoading = true;
 $http.get('http://www.testurl.com/index.php/site/getprofileLocations').then(
   function(data){
       //hide the loader image & process successful data. 
       $scope.imLoading = false;    
   }, function (errorData) {
       //hide the loader image & show error message to user
       $scope.imLoading = false;
 });

<强> CSS:

.im_loading{
 display:none;
 position:fixed;
 top:50%;
 left:50%;
 margin:-35px 0px 0px -35px;
 background:#fff url(../images/loader.gif) no-repeat center center;
 width:70px;
 height:70px;
 z-index:9999;
 -moz-border-radius:10px;
 -webkit-border-radius:10px;
 border-radius:10px;
 -moz-box-shadow:1px 1px 3px #000;
 -webkit-box-shadow:1px 1px 3px #000;
 box-shadow:1px 1px 3px #000;
 opacity:0.7;
 filter:progid:DXImageTransform.Microsoft.Alpha(opacity=70);
}

HTML CODE:

<div class="im_loading" ng-show:"imLoading"></div>

注意:您的代码仅处理成功的ajax调用&amp;没有错误的调用,这是不好的,因为你的代码在返回错误时变得没有响应,所以你也需要处理错误情况。

答案 3 :(得分:0)

你可以做一件事:

  • 默认隐藏您的HTML内容
  • 收到回复时显示

像:

<div class="content" ng-show="!showLoader">
   .....
</div>

因此,只有使用此加载器才会显示,直到您从服务器获取数据。

答案 4 :(得分:0)

每当我们在AngularJS中使用HTTP调用时,我们都希望默认显示加载图像。所以在这里,我们将通过使用自定义指令来实现这一目标。

JS CODE

int Numberone = 0, Numbertwo = 0;
char Op;
char line[512];
if (!fgets(line, sizeof line, stdin))
{
    // error reading ...
}
if (sscanf(line, "%d %c %d", &Numberone, &Op, &Numbertwo) != 3)
{
    // error parsing ...
}

<强> CSS:

var app = angular.module('appMyCustomModule',[]);
app.directive('dirCustomLoader', ['$http', function ($http) {
    return {
        restrict: 'E',
        template: '<div class="loading-icon"></div>',
        link: function (scope, element, attrs) {
            scope.isLoading = function () {
                return $http.pendingRequests.length > 0;
            };
            scope.$watch(scope.isLoading, function (value) {
                if (value) 
                    element.removeClass('ng-hide');
                else 
                    element.addClass('ng-hide');
            });
        }
    };
}]);

HTML CODE:

.loading-icon {
    background: url(static image url) no-repeat scroll center #fff;
    display: inline-block;
    font-size: 0;
    height: 100%;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 9999999999999999999 !important;
    opacity: .5;
}

答案 5 :(得分:0)

有一种更好的方法可以阻止显示两个图标:

(BAD WAY)

当angular操纵DOM时,它可以在隐藏加载图标之前显示搜索图标。这就是为什么它有两个元素是不好的。

<i class="fa fa-search" ng-hide="loadingData" ></i>
<i class="fa fa-circle-o-notch fa-spin" ng-show="loadingData"></i>

(好的方式)

这种方式可以防止在角度隐藏和显示元素时显示加载和搜索图标。

<i class="fa" ng-class="loadingData ?  'fa-circle-o-notch fa-spin' : 'fa-search' " ></i>

脚本就是这样的。

$scope.clickEventThatDoSomething = function () {
    $scope.loadingData = true;
    http.get('http://YourAPIUrl').then(function (data) {
        $scope.loadingData = false;
        $scope.data = data.data;
    }).catch(function (err) {
        $scope.loadingData = false;
    })
}