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学习ng-repeat的过程中常常使用到ng-repeat=”item in array”来循环输出所需要的元素,但是当我们需要使用ng-repeat进行多层嵌套时则容易出现数据重复的问题。
如在加载与点击事件于js中进行两次http请求获取data分别为list01[]数组和list02[]赋值再如下显示则会导致it1下每个ul都会重复输出list02[]数组中的内容
1 2 3 4 5 6 | <ul ng-repeat= "it1 in list01" > <li ng-click= "show(it1)" >{{it1.value}}</li> <ul ng-repeat= "it2 in list02" > <li>{{it2.value}}</li> </ul> </ul> |
输出如:
1 2 3 4 | 1-1 1-2 1-1 1-2 |
而非
1 2 3 4 | 1-1 1-2 2-1 2-2 |
其实这个也不是问题,只要换一种思维方式将列表和父级元素相关联形成树状结构就好了
HTML中代码如下
1 2 3 4 5 6 7 8 9 10 11 12 | < ul ng-repeat = "it1 in list01" > < li ng-click = "show(it1)" >{{it1.name}}</ li > < ul ng-repeat = "it2 in it1.child" ng-show = "it1.showChild" style = "text-indent:10px;" > < li ng-click = "show(it1, it2)" >{{it2.name}}</ li > < ul ng-repeat = "it3 in it2.child" ng-show = "it2.showChild" style = "text-indent:10px;" > < li ng-click = "show(it1, it2, it3)" >{{it3.name}}</ li > < ul ng-repeat = "it4 in it3.child" ng-show = "it3.showChild" > < li >{{it4.name}}</ li > </ ul > </ ul > </ ul > </ ul > |
js中代码如下
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 | $http.get( 'ng01.json' ).success( function (_data) { $scope.list01 = []; $scope.list01 = _data.data; }); $scope.show = function (it1, it2, it3) { if (it3 != null ){ $http.get( "ng04.json" ).success( function (_data) { $scope.list04 = []; $scope.list04 = _data.data; for ( var x in $scope.list03){ $scope.list03[x].showChild = false ; } it3.showChild = true ; it3.child = _data.data; }); return ; } if (it2 != null ){ $http.get( "ng03.json" ).success( function (_data) { $scope.list03 = []; $scope.list03 = _data.data; for ( var x in $scope.list02){ $scope.list02[x].showChild = false ; } it2.showChild = true ; it2.child = _data.data; }); return ; } $http.get( "ng02.json" ).success( function (_data) { $scope.list02 = []; $scope.list02 = _data.data; for ( var x in $scope.list01){ $scope.list01[x].showChild = false ; } it1.showChild = true ; it1.child = _data.data; }); } |
json文件都是这样的
1 2 3 4 5 6 7 | { "success" :1, "data" :[ { "name" : "01" }, { "name" : "02" } ] } |