AngularJS UI路由器命名视图延迟加载 [英] AngularJS UI router named views lazy loading
问题描述
名为View的AngularJS UI路由器基于用户访问而不是在状态路由访问时加载视图.
AngularJS UI router named views loading based on user access rather than loading at the time of state route access.
$stateProvider
.state("login",
{
url: "/login",
templateUrl: getTemplateUrl("login/Index")
})
.state("main",
{
url: "/main",
views:
{
'': { templateUrl: getTemplateUrl('home/shell') },
'test1@main': { templateUrl: 'home/test1' },
'test2@main': { templateUrl: 'home/test2' },
'test3@main': { templateUrl: getTemplateUrl('home/test3') }
}
});
在上面的示例中，当用户访问状态main时，UI路由器将从服务器加载所有命名的html HTML.
In the above example, when a user accesses the state main the UI-router loads all the named views html from server.
我们可以在以下要求时加载命名视图吗?我的意思是，每当我们动态添加新标签时，便只会从服务器加载受尊重的视图html.
Can we load named-views when required below? I mean whenever we add new tab dynamically then only loading respected view html from server.
<tab ng-repeat="tab in tabs">
<div>
<div ui-view='{{tab.view}}'></div>
</div>
</tab>
推荐答案
如果您希望根据$scope.tabs中定义的用户可用标签的值从模板url动态加载标签内容，则应考虑使用简单的指令而不是ui-router视图.
If you are looking to load your tab content dynamically from template urls based on the value of tabs available to the user as defined in $scope.tabs, you should consider using a simple directive rather than ui-router views.
您已经发现ui-router将尝试加载子视图，无论是否在该状态的主视图中引用了子视图.
As you have already discovered ui-router will try and load the subviews regardless of whether they are referenced in the main view for that state.
但是，我们可以使用自己的指令来加载模板，因此，由于该指令仅在主视图中存在时才运行，因此模板可以按需加载.
We can however use our own directive to load templates, and therefore because the directive only runs when present in the main view, the templates load on demand.
我们创建一个template指令，该指令允许我们将模板拉入html元素.
We create a template directive, that allows us to pull in a template into an html element.
.directive('template', ['$compile', '$http', function($compile, $http) {
return {
restrict: 'A',
replace: false,
link: function($scope, element, attrs) {
var template = attrs['template'];
var controller = attrs['controller'];
if(template!==undefined){
// Load the template
$http.get(template).success(function(html){
// Set the template
var e = angular.element(controller === undefined || controller.length === 0 ? html : "<span ng-controller='" + controller + "'>" + html + "</span>");
var compiled = $compile(e);
element.html(e);
compiled($scope);
});
}
}
};
}]);
因此，此代码使用$http服务从服务器获取模板.然后，它使用$compile服务将范围应用于角度模板，并将其渲染到目标元素中.
So this code uses the $http service to get the template from the server. Then it uses the $compile service to apply the scope to the angular template, and renders it into the target element.
如下更新主标签模板的格式.请注意，我们不再引用ui-view，而是将template指令传递给要加载到div中的url. 使用div的当前内容作为加载指示器.
Update the format of your main tabs template as below. Note we no longer reference ui-view, instead we call our template directive passing in the url we want to load in the div. With the current content of the div being the loading indicator.
(如果设置了controller属性，则模板将被具有ng-controller属性的<span>包装，因此可以应用模板控制器.这是可选的.)
(If the controller attribute is set the template will be wrapped with an <span> having the ng-controller attribute, so a template controller can be applied. This is optional.)
<tab ng-repeat="(tabName,tab) in tabs">
<div template='{{tab.template}}' controller="{{tab.controller}}">Loading {{tabName}} ...</div>
</tab>
然后设置要显示的标签:
Then set the tabs you want to display:
$scope.tabs = {
'tab1': { template: 'home/tab1'},
'tab2': { template: 'home/tab2', controller: 'Tab2Controller' },
'tab3': { template: 'home/tab3'}
};
完整来源:
这只是将上面给出的代码作为AngularJS应用的示例. 假设模板路径有效，即home/shell，home/tab1等.
Full source:
This just puts the code given above, as an example AngularJS app. Assumes the template paths are valid i.e. home/shell, home/tab1 etc.
<!DOCTYPE html>
<html>
<head>
<script src="https://code.jquery.com/jquery-1.11.1.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.2/angular.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular-ui-router/0.2.15/angular-ui-router.js"></script>
<meta charset="utf-8">
<title>Angular Views</title>
</head>
<body ng-app="myTabbedApp">
<div ui-view></div>
<script>
angular.module('myTabbedApp', ['ui.router'])
/* Controller for the Main page ie. home/shell */
.controller('MainPageTabController', ['$scope', function($scope) {
// Set the page tabs dynamically as required by your code
$scope.tabs = {
'tab1': { template: 'home/tab1'},
'tab2': { template: 'home/tab2', controller: 'Tab2Controller' },
'tab3': { template: 'home/tab3'}
};
}])
/* Example controller for Tab 2 */
.controller('Tab2Controller', ['$scope', function($scope) {
$scope.hello = "world";
}])
/* State provider for ui router */
.config(['$stateProvider', function($stateProvider){
$stateProvider
.state("login",
{
url: "/login",
templateUrl: "login/index"
})
.state("main",
{
url: "/main",
templateUrl: 'home/shell',
controller: 'MainPageTabController'
});
}])
/* Directive to load templates dynamically */
.directive('template', ['$compile', '$http', function($compile, $http) {
return {
restrict: 'A',
replace: false,
link: function($scope, element, attrs) {
var template = attrs['template'];
if(template!==undefined){
// Load the template
$http.get(template).success(function(html){
// Set the template
var e = angular.element(html);
var compiled = $compile(e);
element.html(e);
compiled($scope);
});
}
}
};
}]);
</script>
</body>
</html>
我希望这会有所帮助.如果您对某事有疑问，请问.
I hope this helps. If you have questions about something just ask.
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