Question

我有一个带有登录页面和注册页面的角应用程序以及用户登录后可以访问的仪表板。目前用户可以直接访问登录页面或注册页面，所以我有两页顶部的ng-app。但这似乎不是正确的做事方式，而且不止一次初始化我的应用程序也没有意义。但是如果我在登录页面上只有ng-app并且用户直接进入注册页面，那么应用程序将不会被初始化，我将无法访问我的注册页面的控制器。我怎么能绕过这个？

我想刚刚初始化我的应用程序，因为我已经阅读了它应该如何完成。

谢谢

Answer 1

将ng-app放在index.html文件中，然后在正文中添加如下内容：

<body>
  <div data-ui-view></div>
</body>

然后你可以使用ui-router或ng-route切换'状态'（即登录，注册等），'view'将填入data-ui-view。我个人认为ui-router要好一些，但要么可以做到。

Answer 2

大多数情况下，每个应用程序必须使用一次ng-app。您可以使用ngRoute模块或使用ui-router管理视图，您可以在其上找到更多选项。

请参阅下面的示例，您可以从中学到一些额外的东西。

＆＃13;

angular.module('demoApp', ['ui.router'])
	.run(function($rootScope, $state) {
            $rootScope.$on('$stateChangeError', function(evt, to, toParams, from, fromParams, error) {
          if (error.redirectTo) {
            $state.go(error.redirectTo);
          } else {
            $state.go('error', {status: error.status})
          }
        })
    })
	.factory('userService', userService)
	.config(routes);

function userService() {
	var usersMock = {
    	'testUser': {
        	username: 'testUser',
            password: '1234'
        },
        'testUser2': {
        	username: 'testUser2',
            password: '1234'
        }
    };
	var userService = {
    	user: undefined,
    	login: function(userCredentials) {
        	// later --> $http.post('auth', userCredentials).then(...)
            // for demo use local data
            var user = usersMock[userCredentials.username]
            userService.user = ( user && ( user.password == userCredentials.password ) ) ? 
            	user : undefined;
            return user;
        },
        logout: function() {
        	userService.user = undefined;
        }
    }
    
    return userService;
}
function routes($urlRouterProvider, $stateProvider) {

	$urlRouterProvider.otherwise('/');
    
    $stateProvider
    	.state('root', {
        	url: '',
        	abstract:true,
            resolve: {
            	'user': function(userService) {
                	return userService.user; // would be async in a real app
                }
            },
            views: {
            	'': {
                	templateUrl: 'layout.html',
                },
            	'header@root': {
                	template: '<h1>header View<span ng-if="user"><button ng-click="logout()">logout</button></span><span ng-if="!user"><button ng-click="login()">login</button></span></h1>',
                    controller: function($scope, $state, user, userService) {
                    	$scope.user = user;
                        $scope.login = function() {
                        	$state.go('login');
                        };
                        $scope.logout = function() {
                        	userService.logout();
                            $state.go('root.home', {}, {reload: true});
                        };
                    }
            	},
                'footer@root': {
                    template: '<p>footer view</p>'
                }
            }
        })
    	.state('root.home', {
            url: '/',
            views: {
                'content': {
                    template: 'Hello at home'
                }
            }
        })
        .state('root.about', {
            url: '/about',
            views: {
                'content': {
                    template: 'about view'
                }
            }
    	})
        .state('root.restricted', {
            url: '/restricted',
            resolve: {
            	auth: function(userService, $q, $timeout) {
                
                	var deferred = $q.defer();
                	/* //with an async
                    return UserService.load().then(function(user){
                      if (permissionService.can(user, {goTo: state})) {
                        return deferred.resolve({});
                      } else {
                        return deferred.reject({redirectTo: 'some_other_state'});
                      }
                    }*/
                    
                   $timeout(function() {
                        if ( angular.isUndefined(userService.user) ) {
                            return deferred.reject({redirectTo: 'login'});
                        }
                        else {
                            return deferred.resolve(userService.user);
                        }
                    });
                    
                    return deferred.promise;
                }
            },
            views: {
                'content': {
                    template: 'this is only visible after login. Hello {{user}}!',
                    controller: function($scope, auth) {
                    	$scope.user = auth.username;
                    }
                }
            }
    	})
        .state('login', {
            url: '/login',
            templateUrl: 'views/login.html',
            controller: function($scope, $state, userService) {
            	$scope.login = function(cred) {
                	var user = userService.login(cred);
                    
                    if (angular.isUndefined(user)) {
                    	alert('username or password incorrect.')
                    }
                    else {
                    	$state.go('root.restricted');
                    }
                };
            }
        });
}

＆＃13;

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular-ui-router/0.2.18/angular-ui-router.js"></script>
<div ng-app="demoApp">
    <a ui-sref="root.home" href="#">home</a>
    <a ui-sref="root.about" href="#">about</a>
    <a ui-sref="root.restricted" href="#">restricted page</a>
    
    <div ui-view>
    </div>
    
    <script type="text/ng-template" id="views/login.html">
    	<h1>Login</h1>
        <label>Username</label><input ng-model="userCred.username"/>
        <label>Password</label><input type="password" ng-model="userCred.password"/>
        <button ng-click="login(userCred)">login</button>
    </script>
    
    <script type="text/ng-template" id="layout.html">
    	<div>
            <div ui-view="header"></div>
            <div ui-view="content"></div>
            <div ui-view="footer"></div>
    	</div>
    </script>
</div>

＆＃13;

多个角落的Angular JS ng-app

2 个答案: