Question

我有2个嵌套的ng-repeat和boolean，这将隐藏加载div，但是在渲染所有内容之前加载div是隐藏的。 Boolean取决于获取所有数据的回调函数。

<tr ng-repeat="package in packages track by $index">
   <td> {{ pack.Name }}</td>
   <td>
      <select ng-hide="package.spinStart" class="form-control" ng-model="package.selectedVersion">
            <option ng-repeat="pack in package.allPackageVersions track by $index"
                    value="{{pack.Version}}"
                    ng-hide="pack.shouldHide"
                    ng-disabled="!expertModeOn && pack.shouldDissable"
                    ng-style="!expertModeOn && pack.shouldDissable && {'color':'#ddd'}">

                    {{pack.NuGetPackageId}} | {{pack.Version}} | {{pack.Published}}
            </option>
      </select>

当所有2个嵌套循环完成后，我如何调用该函数？

我尝试使用$watch语句和directive。谢谢你！

Answer 1

你能用$ last吗？

<!DOCTYPE html>
<html data-ng-app="myApp">

<head>
  <link rel="stylesheet" href="style.css">
  <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.8/angular.min.js"></script>
  <script src="script.js"></script>
</head>

<body data-ng-controller="testController">


  <div ng-repeat="package in packages">
    {{package.name}}
    <div ng-repeat=" pkg in package.selectedVersion" ng-init="$last && call()">
      {{pkg.name}}
    </div>
  </div>

  <script>
    angular
      .module('myApp', [])
      .run(function($rootScope) {
        $rootScope.title = 'myTest Page';
      })
      .controller('testController', ['$scope',
        function($scope) {
          $scope.packages = [{
            name: 'test1',
            selectedVersion: [{
              name: 'test_ver1'
            }, {
              name: 'test_ver2'
            }, {
              name: 'test_ver3'
            }]
          }, {
            name: 'test2',
            selectedVersion: [{
              name: 'test_ver1'
            }, {
              name: 'test_ver2'
            }, {
              name: 'test_ver3'
            }]
          }];

          var counter = 0
          $scope.call = function() {
            counter++
            if (counter == $scope.packages.length) {
              alert("All loops finished");
            }
          }
        }
      ])
  </script>
</body>

</html>

Answer 2

您可以使用在外部循环结束时发出事件的指令您可以在任何循环中重用此指令，只需重新订阅该事件。

app.directive('onRepeatFinish', function($timeout) {
    return {
        restrict: 'A',
        link: function(scope, element, attrs) {
            // $last is a boolean set by angular inside ng-repeats
            if (scope.$last) {
                // Wait for view to fully render
                $timeout(function() {
                    // Emit upwards the tree
                    scope.$emit('repeatFinished');
                });
            }
        }
    };
});

在您的控制器中，订阅该活动：

$scope.$on('repeatFinished', function() {
    $scope.showLoader = false;
});

视图中的用法：

<tr ng-repeat="package in packages track by $index" on-repeat-finish>

完成后，angularjs嵌套的ng-repeat函数调用

2 个答案: