javascript - 如何在 ng-grid 的顶行显示新添加的记录？

Question

当我添加一条记录时，我有一个 ng-grid，该行被插入到网格的底部，我想在我的网格顶部显示新添加的行，以便用户能够知道添加了哪些数据。

这是我的 app.js

var app = angular.module('myApp', ['ngGrid']);
app.controller('MyCtrl', function($scope, $http) {

    $scope.filterOptions = {
        filterText: "",
        useExternalFilter: true
    };

    $scope.totalServerItems = 0;
    $scope.pagingOptions = {
        pageSizes: [5, 10, 20],
        pageSize: 5,
        currentPage: 1
    };
    $scope.setPagingData = function(data, page, pageSize){
        var pagedData = data.slice((page - 1) * pageSize, page * pageSize);
        $scope.myData = pagedData;
        $scope.totalServerItems = data.length;
        if (!$scope.$$phase) {
            $scope.$apply();
        }
    };
    $scope.getPagedDataAsync = function (pageSize, page, searchText) {
        setTimeout(function () {
            var data;
            if (searchText) {
                var ft = searchText.toLowerCase();
                $http.get('largeLoad.json').success(function (largeLoad) {
                    data = largeLoad.filter(function(item) {
                        return JSON.stringify(item).toLowerCase().indexOf(ft) != -1;
                    });
                    $scope.setPagingData(data,page,pageSize);
                });
            } else {
                $http.get('largeLoad.json').success(function (largeLoad) {
                    $scope.setPagingData(largeLoad,page,pageSize);
                });
            }
        }, 100);
    };

    $scope.getPagedDataAsync($scope.pagingOptions.pageSize, $scope.pagingOptions.currentPage);

    $scope.$watch('pagingOptions', function (newVal, oldVal) {
        if (newVal !== oldVal && newVal.currentPage !== oldVal.currentPage) {
            $scope.getPagedDataAsync($scope.pagingOptions.pageSize, $scope.pagingOptions.currentPage, $scope.filterOptions.filterText);
        }
    }, true);

    $scope.$watch('filterOptions', function (newVal, oldVal) {
        if (newVal !== oldVal) {
            $scope.getPagedDataAsync($scope.pagingOptions.pageSize, $scope.pagingOptions.currentPage, $scope.filterOptions.filterText);
        }
    }, true);

    $scope.edit = function (row) {
        row.entity.edit = !row.entity.edit;
    };

    $scope.gridOptions = {
        data: 'myData',
        enableRowSelection: true,
        showGroupPanel: true,
        enableCellSelection: false,
        jqueryUIDraggable: true,
        enablePaging: true,
        showFooter: true,
        totalServerItems:'totalServerItems',
        pagingOptions: $scope.pagingOptions,
        filterOptions: $scope.filterOptions,
        columnDefs: [{
            field: 'nm',
            displayName: 'Name',
            cellTemplate: '<div class="ngCellText"><div ng-show="!row.entity.edit">{{row.getProperty(col.field)}}</div>' +
            '<div ng-show="row.entity.edit" class="ngCellText"><input type="text" ng-model="row.entity.nm"/></div></div>'
        },
            {
            field: 'cty',
            displayName: 'city',
            cellTemplate: '<div class="ngCellText"><div ng-show="!row.entity.edit">{{row.getProperty(col.field)}}</div>' +
            '<div ng-show="row.entity.edit" class="ngCellText"><input type="text" ng-model="row.entity.cty"/></div></div>'
        },
            {
            field: 'hse',
            displayName: 'Address',
            cellTemplate: '<div class="ngCellText"><div ng-show="!row.entity.edit">{{row.getProperty(col.field)}}</div>' +
            '<div ng-show="row.entity.edit" class="ngCellText"><input type="text" ng-model="row.entity.hse"/></div></div>'
            },

            {
                field: 'yrs',
                displayName: 'PinCode',
                cellTemplate: '<div class="ngCellText"><div ng-show="!row.entity.edit">{{row.getProperty(col.field)}}</div>' +
                '<div ng-show="row.entity.edit" class="ngCellText"><input type="text" ng-model="row.entity.yrs"/></div></div>'
            },
         {
            displayName: 'Edit',
            cellTemplate: '<button id="editBtn" type="button" class="btn btn-primary" ng-click="edit(row)" >Modify</button> '

        },
            {
                displayName: 'Remove',
                cellTemplate: '<button id="removebtn" type="button" class="btn btn-primary" ng-click="removeRow($index)" >Remove</button> '
            }

    ]
    };

    $scope.removeRow = function() {
        var index = this.row.rowIndex;
        $scope.gridOptions.selectItem(index, false);
        $scope.myData.splice(index, 1);
    };

这是我的addRow 函数；当这个函数被执行时，一行被插入到网格的底部我希望这个新行在点击添加按钮时显示在最顶部

$scope.addRow = function() {
        $scope.myData.push({nm: 'abc', cty: 0 , hse:'abcd' , yrs:2014});
    };

});

这是我在 plunker 上的代码: http://plnkr.co/edit/QbsQ6uDgNxts9TUMERj2?p=info

Answer 1

当你把数据压入一个数组时，javascript 总是把它放在最后。一个可能的解决方案是使用 unshift 代替 push:

The unshift() method adds new items to the beginning of an array, and returns the new length.