javascript – 如何在UI-Router中修饰当前状态解析功能？不调用当前函数

我试图在$stateProvider中干,并阻止在每个解析中添加相同的auth函数.我已经创建了装饰器,在每个状态更改都会将此函数添加到当前状态,但是不调用auth函数,如何修复它或如何解决已讨论的问题？

app.config(function ($stateProvider, $urlRouterProvider, $provide) {
  $provide.decorator('$state', function($delegate, $rootScope) {
    $rootScope.$on('$stateChangeStart', function(event, state, params) {
      if ($delegate.current === "login" || $delegate.current === "register") {
        return;
      }
      console.log("decorator", $delegate);
      $delegate.current.resolve = {
        auth: ['AuthService', '$stateParams', function(AuthService, $stateParams) {
          //how to invoke this function?
          if (AuthService.isAuthenticated()) {
            return AuthService.me(); //promise
          } else {
            return false;
          }
        }]
      };
    });
    return $delegate;
  });

州定义：

  $stateProvider.state('root', {
    abstract: true,
    url: '/',
    views: {
      "": {
        controller: 'RootCtrl',
        templateUrl: 'views/root.html'
      },
      "header@root": {
        templateUrl: 'views/header.html'
      }
    }
  })
  .state('root.home', {
    url: urlPrefix,
    views: {
      "content@artworks": {
        templateUrl: 'views/home.html',
        //resolve: {
        //  auth: ['AuthService', '$stateParams', function(AuthService, $stateParams) {
        //  }]
        //}
      }
    }
  })
  ...

解决方法:

如果我正确理解您的要求,我们可以使用本机UI-Router内置装饰器：

decorator(name, func)

Allows you to extend (carefully) or override (at your own peril) the stateBuilder object used internally by $stateProvider. This can be used to add custom functionality to ui-router, for example inferring templateUrl based on the state name… (read 07001)

有a working plunker

所以,我们可以有这个var auth

var auth = ['AuthService', '$stateParams',
  function(AuthService, $stateParams) {
    //how to invoke this function on needed states?
    if (AuthService.isAuthenticated()) {
      return AuthService.me();
    } else {
      return false;
    }
  }
];

在这里我们只使用装饰器和一些“IF”逻辑

.config(['$stateProvider', 
  function($stateProvider) {

    $stateProvider.decorator('views', function(state, parent) {
      var result = {},
        views = parent(state);

      // some naive example when to not inject resolve
      if (state.name === "home") { 
        return views;
      }
      // child already has that in parent
      if (state.name.indexOf(".") > 0) { 
        return views;
      }

      angular.forEach(views, function(config, name) {

        // here inject the resolve (if not existing)
        config.resolve = config.resolve || {};
        // and extend it with the auth stuff above
        config.resolve.auth = auth;

        result[name] = config;
      });

      return result;
    });

  }
])

后来很少有我们的州,这将由上述东西扩展

$stateProvider
    .state('home', {
      url: "/home",
      templateUrl: 'tpl.html',
    })
    .state('parent', {
      url: "/parent",
      templateUrl: 'tpl.html',
      controller: 'SharedCtrl',
    })
    .state('parent.child', {
      url: "/child",
      templateUrl: 'tpl.html',
      controller: 'SharedCtrl',
    });

在行动here中检查它

标签：javascript,angularjs,angular-ui-router,angular-decorator
来源： https://codeday.me/bug/20190609/1204675.html