3

在下面的代码中,我正在尝试使用模板(带{{ value }}替换),但我已经尝试了两天来找到一种方法来获取渲染代码以在其上设置一些属性。

我不能使用样式选择器(效果很好),我需要使用 div 的 id。在我的真实代码中,我使用 a templateUrl:,而不是内联代码,但它具有相同的结果。

我应该听哪个事件?选择器将在什么时间点起作用?我已阅读有关编译和链接的信息,并认为答案就在某个地方?

提前致谢 ...

<!doctype html>
<html lang="en" ng-app="myApp">
   <head>
      <meta charset="utf-8">
      <title>My AngularJS App</title>
      <script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js"></script>
   </head>
   <body style="height:100%; width: 100%;">
      <tls-window window-id="fred" window-width="600" window-label-width="150"></tls-window>
      <script src="lib/angular/angular.js"></script>
      <script src="js/app.js"></script>
      <script src="js/core/services.js"></script>
      <script src="js/core/controllers.js"></script>
      <script src="js/core/filters.js"></script>
      <script src="js/core/directives.js"></script>
      <script src="js/core/tlscore-directives.js"></script>
      <script type="text/javascript">

      var coreDirectives = angular.module('tlsCore.directives', []);
      coreDirectives.directive('tlsWindow', function() {
        return {
          restrict: 'E',
          scope: {
            windowId: '@windowId',
            windowWidth: '@windowWidth',
            labelWidth: '@windowLabelWidth'
          },
          replace: true,
          transclude: false,
          template: '<div id="{{windowId}}" class="tls-window" ng-cloak tls-draggable >' +
            '<div id="{{windowId}}-winBackground" class="tls-window-background" style="width: 300px; height: 200px" >' +
            '<div id="{{windowId}}-winToolbarBackground" class="tls-window-toolbar-background">' +
            '<div id="{{windowId}}-winToolbarContent" class="tls-window-toolbar-content" style="width: 300px; height: 100px">' +
            '</div>' +
            '</div>' +
            '</div>',
          link: function(scope, element, attrs) {
            var ele = element.get(element.index(scope.windowId));
            // this works and sets the colour (by class)
            $('.tls-window-toolbar-content').css("background-color", 'red');
            // this does not work as the id of the element is not yet substituted and rendered ??
            $('#fred-winBackground').css("background-color", 'green');
          }
        }
      });   

      </script>
   </body>
</html>
4

2 回答 2

1

选项 1 - 更好

不使用该template方法,而是将 HTML 移动到该link方法中。这使我们能够$interpolate在编译之前手动将括号括起来,然后使用 ID 选择器。=请注意,如果不使用而不是@隔离范围绑定,这将是不可能的,因为@绑定被推迟到以后并且在方法中未定义(在此处link查看更多信息)。

app.directive('tlsWindow', function($interpolate,$compile) {
  return {
    restrict: 'E',
    scope: {
        windowId: '=',
        windowWidth: '=',
        labelWidth: '='
    },
    link: function (scope, element, attrs) {
        var template = '<div id="{{windowId}}" class="tls-window" ng-cloak tls-draggable >' +
        '<div id="{{windowId}}-winBackground" class="tls-window-background" style="width: 300px; height: 200px" >' +
            '<div id="{{windowId}}-winToolbarBackground" class="tls-window-toolbar-background">' +
                '<div id="{{windowId}}-winToolbarContent" class="tls-window-toolbar-content" style="width: 300px; height: 100px">' +
                '</div>' +
            '</div>' +
        '</div>';

        var interpolated = $interpolate(template)(scope);
        var html = $(interpolated);
        element.replaceWith($compile(html)(scope));
        
        $('.tls-window-toolbar-content').css('background-color', 'red');
        $('#fred-winBackground').css('background-color', 'green');
    }   
  }
}); 

这是一个小提琴


选项 2

不是最强大的解决方案,但这也可以。在这里,操作被推迟到使用$timeout. 这也会导致轻微的延迟。

$timeout(function(){
    $('#fred-winBackground').css("background-color", 'green');
},0);

这也需要$timeout注入指令中。

于 2013-06-18T11:23:51.193 回答
0

我看到你有一个关于为什么id 在链接时不可用的答案,但我可能会质疑使用 id 选择器的原因吗?children有了指令后,您可以通过链接函数中的 jqLit​​e/jquery 元素的方法访问模板中的顶级 div 。看这个例子:

angular.module('myApp', [])
.directive('tlsWindow', function() {
        return {
          restrict: 'E',
          scope: {
            windowId: '@windowId',
            windowWidth: '@windowWidth',
            labelWidth: '@windowLabelWidth'
          },
          replace: true,
          transclude: false,
          template: '<div id="{{windowId}}" class="tls-window" ng-cloak tls-draggable >' +
            '<div id="{{windowId}}-winBackground" class="tls-window-background" style="width: 300px; height: 200px" >' +
            '<div id="{{windowId}}-winToolbarBackground" class="tls-window-toolbar-background">' +
            '<div id="{{windowId}}-winToolbarContent" class="tls-window-toolbar-content" style="width: 300px; height: 100px">' +
            '</div>' +
            '</div>' +
            '</div>',
          link: function(scope, element, attrs) {
            // var ele = element.get(element.index(scope.windowId));
            // this works and sets the colour (by class)
            // $('.tls-window-toolbar-content').css("background-color", 'red');
            // this does not work as the id of the element is not yet substituted and rendered ??
            // $('#fred-winBackground').css("background-color", 'green');
            
            // Use the jqlite or jquery children method to locate the first child of your directive
            // element (from linkFn) is the element of tls-window and children() gets you access to the <div> container in your template
            element.children().css("background-color", "green");
          }
        }
      });
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.7.5/angular.min.js"></script>
<div ng-app="myApp">
  <tls-window window-id="fred" window-width="600" window-label-width="150"></tls-window>
</div>

angularjs 不鼓励通过 id 选择器引用元素。通过传递给链接函数的元素上下文使用 jqLit​​e/jquery 方法。

于 2020-04-05T13:49:14.903 回答