我如何在Twitter Bootstrap的脚手架中使用AngularJS ng-repeat?

时间:2012-06-15 19:12:22

标签: twitter-bootstrap angularjs

如何使用AngularJS ng-repeat显示以下HTML(Twitter Bootstrap Scaffolding)?基本上,每隔三条记录我需要关闭</div>,打印<hr>,然后打开另一条<div class="span4">

    <div class="row">
      <div class="span4">
        <h3>
          Project A
        </h3>
      </div>
      <div class="span4">
        <h3>
          Project B
        </h3>
      </div>
      <div class="span4">
        <h3>
          Project C
        </h3>
      </div>
    </div>

    <hr>

    <div class="row">
      <div class="span4">
        <h3>
          Project D
        </h3>
      </div>
      <div class="span4">
        <h3>
          Lab Title
        </h3>
      </div>
      <div class="span4">
        <h3>
          Project E
        </h3>
      </div>
    </div>

我为代码演示创建了一个小提琴 http://jsfiddle.net/ADukg/261/

5 个答案:

答案 0 :(得分:38)

这是一种方式:

<div ng-controller="MyCtrl">
  <div ng-repeat="project in projects">
    <span ng-if="$index % 3 == 0">
      <hr />
      <div class="row">
        <h3 class="span4" ng-if="projects[$index+0]">{{projects[$index+0]}}</h3>
        <h3 class="span4" ng-if="projects[$index+1]">{{projects[$index+1]}}</h3>
        <h3 class="span4" ng-if="projects[$index+2]">{{projects[$index+2]}}</h3>
      </div>
    </span>
  </div>
</div>

如果您有7个数据项,这种方式也可以使用:在最后3个数据中,它只显示第7项,而不是尝试显示不存在的项目8和9。

http://jsfiddle.net/4LhN9/68/

编辑:已更新为使用ng-if&amp;角度1.2.12

答案 1 :(得分:16)

继续the more easy answer。我不喜欢原始的解决方案,因为它产生了空的dom元素。这是每行3个div。

<div ng-controller="ModulesCtrl">
    <div class="row" ng-repeat="i in fields.range()">
        <div class="span4" ng-repeat="field in fields.slice(i,i+3)">
            <h2>{{field}}</h2>
        </div>
    </div>
</div>

在函数FieldsCtrl($ scope)中:

$scope.fields.range = function() {
    var range = [];
    for( var i = 0; i < $scope.fields.length; i = i + 3 )
        range.push(i);
    return range;
}

如果你知道fields.length你可以代替fields.range()使用[0,3,6,9]等

答案 2 :(得分:15)

更优雅的方法是使用视图模型提供分块集合,然后让视图处理它像

<div ng-controller="Controller">
    Projects <input ng-model="projects"></input>
    <hr/>
    <div ng-repeat="row in rows">
        <div ng-repeat="project in row">
            Projects {{project}}
        </div>
        <hr/>
    </div>
</div>​

并且coffeescript非常简单

# Break up an array into even sized chunks.
chunk = (a,s)->
    if a.length == 0
        []
    else               
        ( a[i..i+s-1] for i in [0..a.length - 1 ] by s)

@Controller = ($scope)->
    $scope.projects = "ABCDEF"

    $scope.$watch "projects", ->      
       $scope.rows = chunk $scope.projects.split(""), 3

angular.bootstrap(document, []);

http://jsfiddle.net/ADukg/370/

答案 3 :(得分:2)

要使视图逻辑远离控制器并具有更可重用的解决方案,您可以创建一个自定义过滤器,将阵列拆分为行组:

angular.module('app').filter('group', function() {
    /**
     * splits an array into groups of the given size
     * e.g. ([1, 2, 3, 4, 5], 2) -> [[1, 2], [3, 4], [5]]
     */
    return function(array, groupSize) {
        return _.groupBy(array, function(val, index) {
            return Math.floor(index / groupSize);
        });
    };
});

在视图中:

<div class="row" ng-repeat="group in projects | group:3">
   <div class="span4" ng-repeat="project in group">
      {{project}}
   </div>
</div>

要包含小时,您可以使用ng-repeat起点和终点:

<div class="row" ng-repeat-start="group in projects | group:3">
   <div class="span4" ng-repeat="project in group">
      {{project}}
   </div>
</div>
<hr ng-repeat-end />

答案 4 :(得分:2)

ng-repeat-start and ng-repeat-end end points似乎是实现这一目标的便捷方式:

这导致简单的代码

<div ng-controller="MyCtrl">
    <div ng-repeat-start="project in projects">
        <span>
            <div class="row">
                <h3 class="span4">{{project}}</h3>
            </div
        </span>
    </div>
    <hr ng-repeat-end ng-if="($index + 1) % 3 == 0" />
</div>

请参阅此jsfiddle