angularJS中的ng-repeat指令!
阿新 • • 發佈:2017-07-22
註意 func control wid 案例 del fis cnblogs ext
ng-repeat 指令:
ng-repeat 指令用來遍歷一個數組重復創建當前元素;
<ul ng-app="myApp" ng-controller="myAppController"> <li ng-repeat="item in userNames track by $index">{{$index}}:{{item}}</li> </ul> <script type="text/javascript"> var myApp = angular.module("myApp",[]); myApp.controller(‘myAppController‘,[‘$scope‘,function($scope){ $scope.userNames = { "id":1, "name":"小三", "age":"20" }; }]); </script>
案例二:
<ul ng-app="myApp" ng-controller="myAppController"> <li ng-repeat="item in datashuju track by $index" data-id="{{item.id}}">{{$index}}:{{item.name}}的年齡是{{item.age}}</li> </ul> <script type="text/javascript"> var myApp = angular.module("myApp",[]); myApp.controller(‘myAppController‘,[‘$scope‘,function($scope){ $scope.datashuju = []; for(var i=0; i<10; ++i){ //常見寫法,不寫 i $scope.datashuju[$scope.datashuju.length] = { id:i, name:‘趙小黑‘+i, age:20+i }; }; }]); </script>
在這個例子中,Models中有:
$id:10
item:Objet
$index:1
$first:false
$last:false
$middle:true
$even:false
$odd:true
例如:$first 和 $last的簡單使用:
<ul ng-app="myApp" ng-controller="myAppController"> <li ng-repeat="item in datashuju track by $index" data-id="{{item.id}}">{{$first?‘開始‘:‘‘}}{{$index}}:{{item.name}}的年齡是{{item.age}}{{$last?‘結束‘:‘‘}}</li> </ul>
ng-repeat結合ng-class實現各行換色:
ng-class:會根據當前設置對象的屬性和屬性值決定是否添加特定的類名:
<ul ng-app="myApp" ng-controller="myAppController"> <li ng-repeat="item in datashuju track by $index" ng-class="{red:true}" data-id="{{item.id}}">{{$first?‘開始‘:‘‘}}{{$index}}:{{item.name}}的年齡是{{item.age}}{{$last?‘結束‘:‘‘}}</li> </ul>
實現各行換色:(註意這裏用到的是一個大括號)
<ul ng-app="myApp" ng-controller="myAppController"> <li ng-repeat="item in datashuju track by $index" ng-class="{red:$even,green:$odd}" data-id="{{item.id}}">{{$first?‘開始‘:‘‘}}{{$index}}:{{item.name}}的年齡是{{item.age}}{{$last?‘結束‘:‘‘}}</li> </ul>
ng-class拓展:結合雙向數據綁定,實現選擇顏色替換背景:
<style type="text/css"> .red{background:red} .orange{background: orange;} .yellow{background: yellow;} #box{width: 200px; height: 200px;} </style> <div ng-app> <select ng-model=‘color‘> <option value="red">red</option> <option value="orange">orange</option> <option value="yellow">yellow</option> </select> <div id="box" ng-class="color"></div> </div>
ng-repeat 解決重復項,使用 trak by $index
結合 startsWith()做一個篩選:
<ul ng-app="myApp" ng-controller="myAppController"> <li ng-repeat="item in datashuju track by $index" ng-class="{red:item.startsWith(‘張‘)}">{{item}}</li> </ul> <script type="text/javascript"> var myApp = angular.module("myApp",[]); myApp.controller(‘myAppController‘,[‘$scope‘,function($scope){ $scope.datashuju = [‘劉備‘,‘關羽‘,‘張飛‘,‘關興‘,‘張三‘]; }]); </script>
結合雙向數據綁定使用:
<ul ng-app="myApp" ng-controller="myAppController"> <input type="text" ng-model="fistName"> <li ng-repeat="item in datashuju track by $index" ng-class="{red:item.startsWith(fistName)}">{{item}}</li> </ul>
angularJS中的ng-repeat指令!