我有一个页面,其中包括分布在几个选项卡上的HTML表单元素.我希望用户能够切换标签而不会丢失他在表单元素上输入的数据(我还想保存不必要的数据重新加载).我仍然希望能够将某个链接传递给特定标签.

这听起来像ui-extras粘性状态应该完全符合我的需要.除了我一直没有成功地让它工作.

我研究了示例源代码,当我启动示例时,例如在controllers.js的第57行中找到的库存控制器的构造函数中使用firebug设置断点,我看到构造函数只被触发一次.然而,我的控制器构造函数一次又一次地被触发,我的应用程序的行为非常类似于粘性状态不存在,尽管如果我启用粘性状态调试它告诉我它正在做某事(停用和重新激活状态).

我发现有人声称粘性状态仅适用于此答案中的注释中的命名视图,所以我试图给我的视图命名,但这没有任何区别.

我尝试在我的标签之前插入一个明确的"根状态".

我尝试通过ng-controller或控制器定义在状态中插入控制器.

github上的例子是一个很好的炫耀,但它不仅仅是最小的,而且很难看到实际需要什么,什么不是.

什么是开始使用粘性状态所需的最小例子？(额外奖励:我的代码出了什么问题？).

作为参考,这里有一个尝试失败的傻瓜(参见历史以查看先前尝试的选择).

这是我目前失败的源代码:

var log = '';

function mkController(msg) {
  return function($scope) {
    // This is the constructor of a controller
    // I'd expect this constructor to the first time a state is loaded.
    // When switching to a sister state and back it should not be called again.

    if (!$scope.random) {
      // I expect the $scope object to be retained when changing states for and
      // back. So even if my assumption that the controller will be persistent
      // would be wrong this is to check whether the $scope survives.
      // If the scope survives the random number will be initialized only once
      // and then it won't change anymore:

      $scope.random = Math.round(Math.random()*10000);
    }
    // This log will tell us how often the controller constructor has been called
    // (Should be only once, I think)
    log += 'creating: ' + msg + '\n';
    this.message = log;
  }
}
angular.module('plunker', ['ui.router', 'ct.ui.router.extras.sticky', 'ct.ui.router.extras.dsr'])
.controller('ControllerA', mkController('ControllerA'))
.controller('ControllerB', mkController('ControllerB'))
.run(function($templateCache) {
  $templateCache.put('root.html', '
');
  $templateCache.put('templateA.html', '
Random: {{random}}, Message (templateA): {{controller.message}}
');
  $templateCache.put('templateB.html', '
Random: {{random}}, Message (templateB): {{controller.message}}
');
})
.config(function($stateProvider) {
  $stateProvider
  .state('root', {
    url: '/',
    templateUrl: 'root.html'
  }).state('root.stateA', {
    url: '/stateA',
    views: {
      myview: {
        templateUrl: 'templateA.html',
      }
    },
    sticky: true,
    deepStateRedirect: true
  }).state('root.stateB', {
    url: '/stateB',
    views: {
      myview: {
        templateUrl: 'templateB.html',
      }
    },
    sticky: true,
    deepStateRedirect: true
  });
})
.config(function($stickyStateProvider) {
  $stickyStateProvider.enableDebug(true);
});

yankee.. 8

我想到了:

首先,我没有意识到命名视图实际上是如何使用的:每个选项卡都有一个单独的视图.

其次,我没有意识到自己需要隐藏和展示观点.

两者都在演示页面中提到,但我不得不承认我并没有真正阅读演示页面的文本,因为我认为这只是关于这个特定演示的信息.

无论如何:这是一个我认为是获得粘性状态所需的最小值的例子:

HTML

  
    
    
    
    
    
    
    
    
  

  
    

        
StateA
        
StateB
    
    

  

var log = '';

function mkController(msg) {
  return function($scope) {
    // This is the constructor of a controller
    // I'd expect this constructor to the first time a state is loaded.
    // When switching to a sister state and back it should not be called again.

    if (!$scope.random) {
      // I expect the $scope object to be retained when changing states for and
      // back. So even if my assumption that the controller will be persistent
      // would be wrong this is to check whether the $scope survives.
      // If the scope survives the random number will be initialized only once
      // and then it won't change anymore:

      $scope.random = Math.round(Math.random()*10000);
    }
    // This log will tell us how often the controller constructor has been called
    // (Should be only once, I think)
    log += 'creating: ' + msg + '\n';
    this.message = 'Current msg: ' + msg + '\n\n' + log;
  }
}
angular.module('plunker', ['ui.router', 'ct.ui.router.extras.sticky'])
.controller('ControllerA', mkController('ControllerA'))
.controller('ControllerB', mkController('ControllerB'))
.config(function($stateProvider) {
  $stateProvider
  .state('root', {
    url: '/',
    template: '
'
  }).state('root.stateA', {
    url: '/stateA',
    views: {
      'a@root': {
        template: '
A
Random: {{random}}, Message (templateA): {{controller.message}}
',
      }
    },
    sticky: true
  }).state('root.stateB', {
    url: '/stateB',
    views: {
      'b@root': {
        template: '
B
Random: {{random}}, Message (templateB): {{controller.message}}
',
      }
    },
    sticky: true
  });
})
.config(function($stickyStateProvider) {
  $stickyStateProvider.enableDebug(true);
})
.run(function ($rootScope, $state) {
  $rootScope.$state = $state;
});

  
    
    
    
    
    
    
    
    
  

  
    

        
StateA
        
StateB
    
    

  

var log = '';

function mkController(msg) {
  return function($scope) {
    // This is the constructor of a controller
    // I'd expect this constructor to the first time a state is loaded.
    // When switching to a sister state and back it should not be called again.

    if (!$scope.random) {
      // I expect the $scope object to be retained when changing states for and
      // back. So even if my assumption that the controller will be persistent
      // would be wrong this is to check whether the $scope survives.
      // If the scope survives the random number will be initialized only once
      // and then it won't change anymore:

      $scope.random = Math.round(Math.random()*10000);
    }
    // This log will tell us how often the controller constructor has been called
    // (Should be only once, I think)
    log += 'creating: ' + msg + '\n';
    this.message = 'Current msg: ' + msg + '\n\n' + log;
  }
}
angular.module('plunker', ['ui.router', 'ct.ui.router.extras.sticky'])
.controller('ControllerA', mkController('ControllerA'))
.controller('ControllerB', mkController('ControllerB'))
.config(function($stateProvider) {
  $stateProvider
  .state('root', {
    url: '/',
    template: '
'
  }).state('root.stateA', {
    url: '/stateA',
    views: {
      'a@root': {
        template: '
A
Random: {{random}}, Message (templateA): {{controller.message}}
',
      }
    },
    sticky: true
  }).state('root.stateB', {
    url: '/stateB',
    views: {
      'b@root': {
        template: '
B
Random: {{random}}, Message (templateB): {{controller.message}}
',
      }
    },
    sticky: true
  });
})
.config(function($stickyStateProvider) {
  $stickyStateProvider.enableDebug(true);
})
.run(function ($rootScope, $state) {
  $rootScope.$state = $state;
});