获取 ng-repeat 的匹配 ng-if 的数量

Question

假设我有类似的东西：

<md-grid-tile class="gray" ng-repeat="carto in cartoList" ng-if="search(carto)">
         <md-button ng-click="changeSVG(carto.fileName)" aria-label="carto.displayName">
             <img src="style/images/thumbnails/{{carto.fileName}}.png" width="100%" height="100%" title="{{carto.fullDisplayName}}" style="max-height: 220px;"></img>
         </md-button>
         <md-grid-tile-footer><h3 align="center">{{carto.displayName}}</h3> </md-grid-tile-footer>
</md-grid-tile>

有没有办法检索显示的图块数？表示 ng-repeat 中匹配 ng-if 的元素数：

<md-grid-tile class="gray" ng-repeat="carto in cartoList" ng-if="search(carto)">

根据要求，search 函数：

    $scope.search = function (carto) {
    if ($scope.sideMenu) {
        var searchRegex = new RegExp('global', 'i');

        if (carto.fullDisplayName.search(searchRegex) != -1)
            return true;
    }
    else if ($scope.sideSearch) {
        if ($scope.searched.IS.indexOf(carto.informationSystem) === -1 && carto.informationSystem)
            return false;
        if ($scope.searched.area.indexOf(carto.area) === -1 && carto.area)
            return false;
        if ($scope.searched.block.indexOf(carto.block) === -1 && carto.block)
            return false;
        if ($scope.searched.type.indexOf(carto.type) === -1 && carto.type)
            return false;
        if ($scope.searched.level.indexOf(carto.level) === -1 && carto.level)
            return false;

        if ($scope.searchInput) {
            var searchRegex = new RegExp($scope.searchInput, 'i');

            if (carto.fullDisplayName.search(searchRegex) === -1)
                return false;
        }
        if (!$scope.homeVisible) {
            $scope.homeVisible = true;
            window.history.pushState("newUrl", "CartoViewer", window.location.origin + window.location.pathname);
        }
        return true;
    }
    else
        return true;
};

Answer 1

就个人而言，我会在将其发送到视图之前过滤 cartoList ：

$scope.cartoListFiltered = function() { return $scope.cartoList.filter($scope.search); };

在您看来：

<md-grid-tile class="gray" ng-repeat="carto in cartoListFiltered()"> <md-button ng-click="changeSVG(carto.fileName)" aria-label="carto.displayName"> <img src="style/images/thumbnails/{{carto.fileName}}.png" width="100%" height="100%" title="{{carto.fullDisplayName}}" style="max-height: 220px;"></img> </md-button> <md-grid-tile-footer><h3 align="center">{{carto.displayName}}</h3> </md-grid-tile-footer> </md-grid-tile>

这会针对每个人 carto 运行您的 $scope.search，并且仅包括 return 正确的 carto。与 ng-if 相同，除了逻辑在控制器上执行（它应该在的地方）

获取 ng-repeat 的匹配 ng-if 的数量

Get number of matching ng-if of a ng-repeat

html

javascript

angularjs

angularjs-ng-repeat

angular-ng-if