我正在使用AngularJS的$http服务来进行Ajax请求。
如何在Ajax请求执行时显示旋转GIF(或另一种类型的忙碌指示器)?
我在AngularJS文档中没有看到类似ajaxstartevent的东西。
我正在使用AngularJS的$http服务来进行Ajax请求。
如何在Ajax请求执行时显示旋转GIF(或另一种类型的忙碌指示器)?
我在AngularJS文档中没有看到类似ajaxstartevent的东西。
当前回答
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 = $q.defer(); error.show(config.data, function() { deferred.reject(config); }); return deferred.promise; } }; }).factory('requestCount', function() { var count = 0; return { increase: function() { count++; }, descrease: function() { if (count === 0) return; count--; }, get: function() { return count; } }; })
其他回答
如果你在一个服务/工厂中包装你的api调用,那么你可以跟踪那里的加载计数器(每个答案和@JMaylin的优秀同步建议),并通过一个指令引用加载计数器。或其任何组合。
API 包装器
yourModule
.factory('yourApi', ['$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>
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
$timeout(function() {
if(requestInitiated) return;
_stopLoading();
console.log('Response received with interceptor');
},300);
return response;
}
authInterceptorServiceFactory.request = _request;
authInterceptorServiceFactory.responseError = _responseError;
authInterceptorServiceFactory.requestError = _requestError;
authInterceptorServiceFactory.response = _response;
return authInterceptorServiceFactory;
}]);
刚刚发现了angular-busy指令,它显示了一个依赖于某些异步调用的小加载器。
例如,如果你必须创建一个GET,在$作用域中引用承诺,
$scope.req = $http.get('http://google.fr');
像这样称呼它:
<div cg-busy="req"></div>
这是GitHub。
你也可以使用bower安装它(别忘了更新你的项目依赖项):
bower install angular-busy --save
这是我的解决方案,我觉得比其他贴在这里的要容易得多。虽然不知道它有多“漂亮”,但它解决了我所有的问题
我有一个css样式叫做loading
.loading { display: none; }
加载div的html可以是任何东西,但我使用了一些FontAwesome图标和旋转方法:
<div style="text-align:center" ng-class="{ 'loading': !loading }">
<br />
<h1><i class="fa fa-refresh fa-spin"></i> Loading data</h1>
</div>
在你想要隐藏的元素上,你只需这样写:
<something ng-class="{ 'loading': loading }" class="loading"></something>
在函数中,我把这个设为load。
(function (angular) {
function MainController($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。
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"/>