AngularJS - 加载图标，而等待数据/数据​​计算 [英] AngularJS - Loading icon whilst waiting for data/data calculation

问题描述

我有一个简单的角度http.get：

I have a simple Angular http.get:

app.factory('countriesService', function($http) {
return {
    getCountryData: function(done) {
        $http.get('/resources/json/countries.json')
        .success(function(data) { done(data);})
        .error(function(error) {
            alert('An error occured');
        });
    }
}
});

例如以.json：

Example .JSON:

{
"NoCities": 66,
"Balance": 2103,
"Population":  63705000,
"CityInfo": [
    {
        "CityName": "London",
        "CityPopulation": "7825200",
        "Facts": {
            "SubFact1": "xzy",
            "SubFact2": "xzy",
            "SubFact3": "xzy",
            "SubFact4": "xzy",
            "SubFact5": "xzy"
        },
    },
    {
        "CityName": "Manchester",
        "CityPopulation": "2584241",
        "Facts": {
            "SubFact1": "abc",
            "SubFact2": "abc",
            "SubFact3": "abc",
            "SubFact4": "abc"
        },
    }

],
"SubmitInfo": null,
"FormAction": null,
"FormController": null,
}

我注意到，当我的页面进行。长度，有时可能需要一段时间的数据加载，例如：

I've noticed when my page is performing a .length, sometimes it can take a while for the data to load, for example:

<div>
    <a>Countries</a> : {{Countries.length}}
</div>

角是否有某种形式的等待/加载图标的，我可以证明，而该数据在DIV被填充？

Does Angular have some form of waiting/loading icon that i could show whilst the data in the DIV is being populated?

在理想情况下的东西重量轻，这并不需要一个库（我的应用程序使用jQuery太）

Ideally something lightweight and that doesnt require a library to be loaded (my application is using jQuery too)

感谢

推荐答案

这是我的一贯做法。要OZ_的角度来看，这需要字体真棒。在＆LT; I＆GT;的类发发微调发旋是该库的引用

This is my usual approach. To OZ_'s point, this requires Font Awesome. The <i>'s classes fa fa-spinner fa-spin are a reference to that library.

虽然，你也可以选择显示/隐藏 .gif注意：指示加载。

Although, you could also opt to show/hide a .gif that indicates loading.

使用 NG-隐藏和 NG-节目来控制微调和元素将包含人口的知名度数据。

Using ng-hide and ng-show to control visibility of the spinner and element that will contain your populated data.

<p class="text-center" ng-hide="dataLoaded">
    <i class="fa fa-spinner fa-spin"></i>
</p>
<div ng-show="dataLoaded">
    <a>Countries</a> : {{Countries.length}}
</div>

JS

在您的来电，设置 $ scope.dataLoaded 到假。然后，你的成功块中，将其设置为真正。另外值得一提的，您需要 $范围传递给你的工厂。

JS

Before your call, set $scope.dataLoaded to false. Then, within your success block, set it to true. Also worth noting you'll need to pass $scope to your factory.

app.factory('countriesService', function($http, $scope) {
    return {
        getCountryData: function(done) {
            $scope.dataLoaded = false;
            $http.get('/resources/json/countries.json')
            .success(function(data) { 
                done(data); 
                $scope.dataLoaded = true;
             })
            .error(function(error) {
                alert('An error occured');
            });
        }
    }
});

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