由于position:fixed的功能最近发生了变化，我很难将gif加载器显示在所有元素之上，所以我不得不使用angular内置的jQuery。

Html

<div ng-controller="FetchController">
      <div id="spinner"></div>
</div>

Css

#spinner {display: none}
body.spinnerOn #spinner { /* body tag not necessary actually */
   display: block;
   height: 100%;
   width: 100%;
   background: rgba(207, 13, 48, 0.72) url(img/loader.gif) center center no-repeat;
   position: fixed;
   top: 0;
   left: 0;
   z-index: 9999;
}
body.spinnerOn main.content { position: static;} /* and whatever content needs to be moved below your fixed loader div */

控制器

app.controller('FetchController', ['$scope', '$http', '$templateCache', '$location', '$q',
function($scope, $http, $templateCache, $location, $q) {

angular.element('body').addClass('spinnerOn'); // add Class to body to show spinner

$http.post( // or .get(
    // your data here
})
.then(function (response) {
    console.info('success');     
    angular.element('body').removeClass('spinnerOn'); // hide spinner

    return response.data;               
}, function (response) {                   
    console.info('error'); 
    angular.element('body').removeClass('spinnerOn'); // hide spinner
});

})

希望这对你有所帮助。

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; } }; })

你可以使用angular interceptor来管理http请求调用

  <div class="loader">
    <div id="loader"></div>
  </div>

<script>
    var app = angular.module("myApp", []);

    app.factory('httpRequestInterceptor', ['$rootScope', '$location', function ($rootScope, $location) {
        return {
            request: function ($config) {
                $('.loader').show();
                return $config;
            },
            response: function ($config) {
                $('.loader').hide();
                return $config;
            },
            responseError: function (response) {
                return response;
            }
        };
    }]);

    app.config(['$stateProvider', '$urlRouterProvider', '$httpProvider',
        function ($stateProvider, $urlRouterProvider, $httpProvider) {
            $httpProvider.interceptors.push('httpRequestInterceptor');
        }]);

</script>

https://stackoverflow.com/a/49632155/4976786

分享来自@bulltorious的精彩答案的我的版本，更新到更新的angular构建(我使用了1.5.8版本的代码)，还加入了@JMaylin的想法，使用计数器来健壮地处理多个并发请求，以及选择跳过显示小于最小毫秒数的请求动画:

var app = angular.module('myApp');
var BUSY_DELAY = 1000; // Will not show loading graphic until 1000ms have passed and we are still waiting for responses.

app.config(function ($httpProvider) {
  $httpProvider.interceptors.push('busyHttpInterceptor');
})
  .factory('busyHttpInterceptor', ['$q', '$timeout', function ($q, $timeout) {
    var counter = 0;
    return {
      request: function (config) {
        counter += 1;
        $timeout(
          function () {
            if (counter !== 0) {
              angular.element('#busy-overlay').show();
            }
          },
          BUSY_DELAY);
        return config;
      },
      response: function (response) {
        counter -= 1;
        if (counter === 0) {
          angular.element('#busy-overlay').hide();
        }
        return response;
      },
      requestError: function (rejection) {
        counter -= 1;
        if (counter === 0) {
          angular.element('#busy-overlay').hide();
        }
        return rejection;
      },
      responseError: function (rejection) {
        counter -= 1;
        if (counter === 0) {
          angular.element('#busy-overlay').hide();
        }
        return rejection;
      }
    }
  }]);

https://github.com/wongatech/angular-http-loader是一个很好的项目。

例如http://wongatech.github.io/angular-http-loader/

下面的代码显示了发生请求时的模板示例/loader.tpl.html。

<div ng-http-loader template="example/loader.tpl.html"></div>

下面是我的实现，就像ng-show和请求计数器一样简单。

它使用一个新的服务为所有请求$http:

myApp.service('RqstSrv', [ '$http', '$rootScope', function($http, $rootScope) {
    var rqstService = {};

    rqstService.call = function(conf) {

        $rootScope.currentCalls = !isNaN($rootScope.currentCalls) ?  $rootScope.currentCalls++ : 0;

        $http(conf).then(function APICallSucceed(response) {
            // Handle success
        }, function APICallError(response) {
            // Handle error
        }).then(function() {
            $rootScope.currentCalls--;
        });
    }
} ]);

然后你可以根据当前调用的数量使用你的加载器:

<img data-ng-show="currentCalls > 0" src="images/ajax-loader.gif"/>