对于页面加载和模态，最简单的方法是使用ng-show指令并使用一个作用域数据变量。喜欢的东西:

ng-show="angular.isUndefined(scope.data.someObject)".

在这里，当someObject未定义时，旋转器将显示。一旦服务返回数据并填充someObject，微调器将返回其隐藏状态。

如果你正在使用ngResource，对象的$resolved属性对加载器很有用:

对于资源，如下所示:

var User = $resource('/user/:id', {id:'@id'});
var user = User.get({id: 1})

你可以将加载器链接到资源对象的$resolved属性:

<div ng-hide="user.$resolved">Loading ...</div>

下面是AngularJS当前使用的咒语:

angular.module('SharedServices', [])
    .config(function ($httpProvider) {
        $httpProvider.responseInterceptors.push('myHttpInterceptor');
        var spinnerFunction = function (data, headersGetter) {
            // todo start the spinner here
            //alert('start spinner');
            $('#mydiv').show();
            return data;
        };
        $httpProvider.defaults.transformRequest.push(spinnerFunction);
    })
// register the interceptor as a service, intercepts ALL angular ajax http calls
    .factory('myHttpInterceptor', function ($q, $window) {
        return function (promise) {
            return promise.then(function (response) {
                // do something on success
                // todo hide the spinner
                //alert('stop spinner');
                $('#mydiv').hide();
                return response;

            }, function (response) {
                // do something on error
                // todo hide the spinner
                //alert('stop spinner');
                $('#mydiv').hide();
                return $q.reject(response);
            });
        };
    });

//regular angular initialization continued below....
angular.module('myApp', [ 'myApp.directives', 'SharedServices']).
//.......

这里是它的其余部分(HTML / CSS)....使用

$('#mydiv').show(); 
$('#mydiv').hide(); 

来切换它。注意:以上是在post开头的angular模块中使用的

#mydiv {  
    position:absolute;
    top:0;
    left:0;
    width:100%;
    height:100%;
    z-index:1000;
    background-color:grey;
    opacity: .8;
 }

.ajax-loader {
    position: absolute;
    left: 50%;
    top: 50%;
    margin-left: -32px; /* -1 * image width / 2 */
    margin-top: -32px;  /* -1 * image height / 2 */
    display: block;     
}

<div id="mydiv">
    <img src="lib/jQuery/images/ajax-loader.gif" class="ajax-loader"/>
</div>

如果你在一个服务/工厂中包装你的api调用，那么你可以跟踪那里的加载计数器(每个答案和@JMaylin的优秀同步建议)，并通过一个指令引用加载计数器。或其任何组合。

API 包装器

yourModule
    .factory('yourApi', ['$http', function ($http) {
        var api = {}

        //#region ------------ spinner -------------

        // ajax loading counter
        api._loading = 0;

        /**
         * Toggle check
         */
        api.isOn = function () { return api._loading > 0; }

        /**
         * Based on a configuration setting to ignore the loading spinner, update the loading counter
         * (for multiple ajax calls at one time)
         */
        api.spinner = function(delta, config) {
            // if we haven't been told to ignore the spinner, change the loading counter
            // so we can show/hide the spinner

            if (NG.isUndefined(config.spin) || config.spin) api._loading += delta;

            // don't let runaway triggers break stuff...
            if (api._loading < 0) api._loading = 0;

            console.log('spinner:', api._loading, delta);
        }
        /**
         * Track an ajax load begin, if not specifically disallowed by request configuration
         */
        api.loadBegin = function(config) {
            api.spinner(1, config);
        }
        /**
         * Track an ajax load end, if not specifically disallowed by request configuration
         */
        api.loadEnd = function (config) {
            api.spinner(-1, config);
        }

        //#endregion ------------ spinner -------------

        var baseConfig = {
            method: 'post'
            // don't need to declare `spin` here
        }

        /**
         * $http wrapper to standardize all api calls
         * @param args stuff sent to request
         * @param config $http configuration, such as url, methods, etc
         */
        var callWrapper = function(args, config) {
            var p = angular.extend(baseConfig, config); // override defaults

            // fix for 'get' vs 'post' param attachment
            if (!angular.isUndefined(args)) p[p.method == 'get' ? 'params' : 'data'] = args;

            // trigger the spinner
            api.loadBegin(p);

            // make the call, and turn of the spinner on completion
            // note: may want to use `then`/`catch` instead since `finally` has delayed completion if down-chain returns more promises
            return $http(p)['finally'](function(response) {
                api.loadEnd(response.config);
                return response;
            });
        }

        api.DoSomething = function(args) {
            // yes spinner
            return callWrapper(args, { cache: true });
        }
        api.DoSomethingInBackground = function(args) {
            // no spinner
            return callWrapper(args, { cache: true, spin: false });
        }

        // expose
        return api;
    });

微调控制项指令

(function (NG) {
    var loaderTemplate = '<div class="ui active dimmer" data-ng-show="hasSpinner()"><div class="ui large loader"></div></div>';

    /**
     * Show/Hide spinner with ajax
     */
    function spinnerDirective($compile, api) {
        return {
            restrict: 'EA',
            link: function (scope, element) {
                // listen for api trigger
                scope.hasSpinner = api.isOn;

                // attach spinner html
                var spin = NG.element(loaderTemplate);
                $compile(spin)(scope); // bind+parse
                element.append(spin);
            }
        }
    }

    NG.module('yourModule')
        .directive('yourApiSpinner', ['$compile', 'yourApi', spinnerDirective]);
})(angular);

使用

<div ng-controller="myCtrl" your-api-spinner> ... </div>

下面的方法将记录所有的请求，并且只在所有请求完成时隐藏:

app.factory('httpRequestInterceptor', function(LoadingService, requestCount) { return { request: function(config) { if (!config.headers.disableLoading) { requestCount.increase(); LoadingService.show(); } return config; } }; }).factory('httpResponseInterceptor', function(LoadingService, $timeout, error, $q, requestCount) { function waitAndHide() { $timeout(function() { if (requestCount.get() === 0){ LoadingService.hide(); } else{ waitAndHide(); } }, 300); } return { response: function(config) { requestCount.descrease(); if (requestCount.get() === 0) { waitAndHide(); } return config; }, responseError: function(config) { requestCount.descrease(); if (requestCount.get() === 0) { waitAndHide(); } var deferred = $q.defer(); error.show(config.data, function() { deferred.reject(config); }); return deferred.promise; } }; }).factory('requestCount', function() { var count = 0; return { increase: function() { count++; }, descrease: function() { if (count === 0) return; count--; }, get: function() { return count; } }; })

显示不同url更改之间加载的另一个解决方案是:

$rootScope.$on('$locationChangeStart', function() {
  $scope.loading++;
});

$rootScope.$on('$locationChangeSuccess', function() {
  $timeout(function() {
    $scope.loading--;
  }, 300);
});

然后在标记中用ng-show="loading"切换旋转器。

如果你想在ajax请求中显示它，只需添加$scope。当请求开始和结束时加载++，添加$scope.loading——。