我有一个页面，其中包含分布在多个选项卡上的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。
听起来像ui-extras粘性状态应该完全符合我的需要。除非我一直没有成功地让它发挥作用。
我研究了example源代码，当我启动示例时，例如在Line 57 in controllers.js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会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this answer中的评论中的命名视图，所以我尝试给我的视图命名，但这没有任何区别。
我尝试插入一个明确的＆＃34; root状态＆＃34;在我的标签之前。
我试图通过ng-controller或控制器定义在状态中插入控制器。
关于github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。
开始使用粘性状态需要什么样的最小示例？（奖励：我的代码出了什么问题？）。
此处参考的是plunkr with my failed attempt（请参阅历史记录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', '<div ui-view="myview"></div>');
$templateCache.put('templateA.html', '<div ng-controller="ControllerA as controller"><pre>Random: {{random}}, Message (templateA): {{controller.message}}</pre></div>');
$templateCache.put('templateB.html', '<div ng-controller="ControllerB as controller"><pre>Random: {{random}}, Message (templateB): {{controller.message}}</pre></div>');
})
.config(function($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) {
$stickyStateProvider.enableDebug(true);
});
答案 0 :(得分：8)
我明白了：
在演示页面中都提到了这两个，但我不得不承认我并没有真正仔细阅读演示页面的文本，因为我认为这只是关于这个特定演示的信息。
无论如何：这是一个我认为是实现粘性状态所需的最低要求的例子：
<!DOCTYPE html>
<html ng-app="plunker">
<head>
<meta charset="utf-8" />
<title>AngularJS Plunker</title>
<script>document.write('<base href="' + document.location + '" />');</script>
<link href="style.css" rel="stylesheet" />
<script data-semver="1.3.12" src="https://code.angularjs.org/1.3.12/angular.js" data-require="angular.js@1.3.x"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular-ui-router/0.2.13/angular-ui-router.js"></script>
<script src="ui-router-extras.js"></script>
<script src="app.js"></script>
</head>
<body>
<ul class="nav nav-tabs nav-tabs-head" role="tablist">
<li ui-sref-active="active"><a ui-sref="root.stateA" role="tab">StateA</a></li>
<li ui-sref-active="active"><a ui-sref="root.stateB" role="tab">StateB</a></li>
</ul>
<div ui-view="" />
</body>
</html>
var log = '';
function mkController(msg) {
return function($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) {
$stateProvider
.state('root', {
url: '/',
template: '<div ui-view="a" ng-show="$state.includes(\'root.stateA\')"></div><div ui-view="b" ng-show="$state.includes(\'root.stateB\')"></div>'
}).state('root.stateA', {
url: '/stateA',
views: {
'a@root': {
template: '<div ng-controller="ControllerA as controller"><h1>A</h1><pre>Random: {{random}}, Message (templateA): {{controller.message}}</pre></div>',
}
},
sticky: true
}).state('root.stateB', {
url: '/stateB',
views: {
'b@root': {
template: '<div ng-controller="ControllerB as controller"><h1>B</h1><pre>Random: {{random}}, Message (templateB): {{controller.message}}</pre></div>',
}
},
sticky: true
});
})
.config(function($stickyStateProvider) {
$stickyStateProvider.enableDebug(true);
})
.run(function ($rootScope, $state) {
$rootScope.$state = $state;
});