使用拦截器来显示http请求上的加载条

'use strict';
appServices.factory('authInterceptorService', ['$q', '$location', 'localStorage','$injector','$timeout', function ($q, $location, localStorage, $injector,$timeout) {

var authInterceptorServiceFactory = {};
var requestInitiated;

//start loading bar
var _startLoading = function () {
   console.log("error start loading");
   $injector.get("$ionicLoading").show();

}

//stop loading bar
var _stopLoading = function () {
    $injector.get("$ionicLoading").hide();
}

//request initiated
var _request = function (config) {
     requestInitiated = true;
    _startLoading();
    config.headers = config.headers || {};
    var authDataInitial = localStorage.get('authorizationData');
    if (authDataInitial && authDataInitial.length > 2) {
        var authData = JSON.parse(authDataInitial);
        if (authData) {
            config.headers.Authorization = 'Bearer ' + authData.token;
        }
    }
    return config;
}

//request responce error
var _responseError = function (rejection) {
   _stopLoading();
    if (rejection.status === 401) {
        $location.path('/login');
    }
    return $q.reject(rejection);
}

//request error
var _requestError = function (err) {
   _stopLoading();
   console.log('Request Error logging via interceptor');
   return err;
}

//request responce
var _response = function(response) {
    requestInitiated = false;

   // Show delay of 300ms so the popup will not appear for multiple http request
   $timeout(function() {

        if(requestInitiated) return;
        _stopLoading();
        console.log('Response received with interceptor');

    },300);

return response;
}



authInterceptorServiceFactory.request = _request;
authInterceptorServiceFactory.responseError = _responseError;
authInterceptorServiceFactory.requestError = _requestError;
authInterceptorServiceFactory.response = _response;

return authInterceptorServiceFactory;
}]);

这是我的解决方案，我觉得比其他贴在这里的要容易得多。虽然不知道它有多“漂亮”，但它解决了我所有的问题

我有一个css样式叫做loading

.loading { display: none; }

加载div的html可以是任何东西，但我使用了一些FontAwesome图标和旋转方法:

<div style="text-align:center" ng-class="{ 'loading': !loading }">
    <br />
    <h1><i class="fa fa-refresh fa-spin"></i> Loading data</h1>
</div>

在你想要隐藏的元素上，你只需这样写:

<something ng-class="{ 'loading': loading }" class="loading"></something>

在函数中，我把这个设为load。

(function (angular) {
    function MainController($scope) {
        $scope.loading = true

我使用的是SignalR，所以在hubProxy.client.allLocks函数(当它完成了通过锁)，我只是把

 $scope.loading = false
 $scope.$apply();

当页面加载时，这也隐藏了{{someField}}，因为我在load上设置了加载类，AngularJS随后删除了它。

这真的取决于你的特定用例，但一个简单的方法是遵循这样的模式:

.controller('MainCtrl', function ( $scope, myService ) {
  $scope.loading = true;
  myService.get().then( function ( response ) {
    $scope.items = response.data;
  }, function ( response ) {
    // TODO: handle the error somehow
  }).finally(function() {
    // called no matter success or failure
    $scope.loading = false;
  });
});

然后在模板中对它做出反应:

<div class="spinner" ng-show="loading"></div>
<div ng-repeat="item in items>{{item.name}}</div>

这对我来说很管用:

HTML:

  <div id="loader" class="ng-hide" ng-show="req.$$state.pending">
    <img class="ajax-loader" 
         width="200" 
         height="200" 
         src="/images/spinner.gif" />
  </div>

角:

  $scope.req = $http.get("/admin/view/"+id).success(function(data) {          
      $scope.data = data;
  });

当$http返回的承诺是未决的，ng-show将评估它是“真实的”。一旦承诺被解决，这将自动更新…这正是我们想要的。

使用拦截器来显示http请求上的加载条

'use strict';
appServices.factory('authInterceptorService', ['$q', '$location', 'localStorage','$injector','$timeout', function ($q, $location, localStorage, $injector,$timeout) {

var authInterceptorServiceFactory = {};
var requestInitiated;

//start loading bar
var _startLoading = function () {
   console.log("error start loading");
   $injector.get("$ionicLoading").show();

}

//stop loading bar
var _stopLoading = function () {
    $injector.get("$ionicLoading").hide();
}

//request initiated
var _request = function (config) {
     requestInitiated = true;
    _startLoading();
    config.headers = config.headers || {};
    var authDataInitial = localStorage.get('authorizationData');
    if (authDataInitial && authDataInitial.length > 2) {
        var authData = JSON.parse(authDataInitial);
        if (authData) {
            config.headers.Authorization = 'Bearer ' + authData.token;
        }
    }
    return config;
}

//request responce error
var _responseError = function (rejection) {
   _stopLoading();
    if (rejection.status === 401) {
        $location.path('/login');
    }
    return $q.reject(rejection);
}

//request error
var _requestError = function (err) {
   _stopLoading();
   console.log('Request Error logging via interceptor');
   return err;
}

//request responce
var _response = function(response) {
    requestInitiated = false;

   // Show delay of 300ms so the popup will not appear for multiple http request
   $timeout(function() {

        if(requestInitiated) return;
        _stopLoading();
        console.log('Response received with interceptor');

    },300);

return response;
}



authInterceptorServiceFactory.request = _request;
authInterceptorServiceFactory.responseError = _responseError;
authInterceptorServiceFactory.requestError = _requestError;
authInterceptorServiceFactory.response = _response;

return authInterceptorServiceFactory;
}]);

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;
      }
    }
  }]);