angularJS中的ng-repeat指令!
ng-repeat 指令:
ng-repeat 指令用来遍历一个数组重复创建当前元素;
<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}}的年龄是{{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){//常见写法,不写 i $scope.datashuju[$scope.datashuju.length] = {id:i,name:'赵小黑'+i,age:20+i};}; }]); script>
在这个例子中,Models中有:
$id:10
item:Objet
$index:1
$first:false
$last:false
$middle:true
$even:false
$odd:true
例如:$first 和 $last的简单使用:
<ul ng-app="myApp" ng-controller="myAppController"><li ng-repeat="item in datashuju track by $index" data-id="{{item.id}}">{{$first?'开始':''}}{{$index}}:{{item.name}}的年龄是{{item.age}}{{$last?'结束':''}}li> ul>
ng-repeat结合ng-class实现各行换色:
ng-class:会根据当前设置对象的属性和属性值决定是否添加特定的类名:
<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?'开始':''}}{{$index}}:{{item.name}}的年龄是{{item.age}}{{$last?'结束':''}}li> ul>
实现各行换色:(注意这里用到的是一个大括号)
<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?'开始':''}}{{$index}}:{{item.name}}的年龄是{{item.age}}{{$last?'结束':''}}li> ul>
ng-class拓展:结合双向数据绑定,实现选择颜色替换背景:
<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">redoption><option value="orange">orangeoption><option value="yellow">yellowoption> select> <div id="box" ng-class="color">div> div>
ng-repeat 解决重复项,使用 trak by $index
结合 startsWith()做一个筛选:
<ul ng-app="myApp" ng-controller="myAppController"><li ng-repeat="item in datashuju track by $index" ng-class="{red:item.startsWith('张')}">{{item}}li> ul> <script type="text/javascript"> var myApp = angular.module("myApp",[]); myApp.controller('myAppController',['$scope',function($scope){$scope.datashuju = ['刘备','关羽','张飞','关兴','张三']; }]); script>
结合双向数据绑定使用:
<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>
转载于:https://www.cnblogs.com/e0yu/p/7221470.html
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