是否有一种方法可以ng-repeat定义的次数，而不是总是要迭代一个数组?
例如，下面我希望列表项显示5次，假设为$scope。数字等于5，加上增加的数字，所以每个列表项都增加，如1,2,3,4,5
预期的结果:
<ul>
<li><span>1</span></li>
<li><span>2</span></li>
<li><span>3</span></li>
<li><span>4</span></li>
<li><span>5</span></li>
</ul>
当前回答
一个更简单的方法是(以5次为例):
<div ng-repeat="x in [].constructor(5) track by $index">
...
</div>
其他回答
Angular提供了一个非常可爱的函数slice..使用它你可以达到你想要的效果。 例如ng-repeat="ab in abc.slice(startIndex,endIndex)"
这个演示:http://jsfiddle.net/sahilosheal/LurcV/39/将帮助你，并告诉你如何使用这个“让生活更简单”的功能。：）
html:
<div class="div" ng-app >
<div ng-controller="Main">
<h2>sliced list(conditional NG-repeat)</h2>
<ul ng-controller="ctrlParent">
<li ng-repeat="ab in abc.slice(2,5)"><span>{{$index+1}} :: {{ab.name}} </span></li>
</ul>
<h2>unsliced list( no conditional NG-repeat)</h2>
<ul ng-controller="ctrlParent">
<li ng-repeat="ab in abc"><span>{{$index+1}} :: {{ab.name}} </span></li>
</ul>
</div>
CSS:
ul
{
list-style: none;
}
.div{
padding:25px;
}
li{
background:#d4d4d4;
color:#052349;
}
ng-JS:
function ctrlParent ($scope) {
$scope.abc = [
{ "name": "What we do", url: "/Home/AboutUs" },
{ "name": "Photo Gallery", url: "/home/gallery" },
{ "name": "What we work", url: "/Home/AboutUs" },
{ "name": "Photo play", url: "/home/gallery" },
{ "name": "Where", url: "/Home/AboutUs" },
{ "name": "playground", url: "/home/gallery" },
{ "name": "What we score", url: "/Home/AboutUs" },
{ "name": "awesome", url: "/home/gallery" },
{ "name": "oscar", url: "/Home/AboutUs" },
{ "name": "american hustle", url: "/home/gallery" }
];
}
function Main($scope){
$scope.items = [{sort: 1, name: 'First'},
{sort: 2, name: 'Second'},
{sort: 3, name: 'Third'},
{sort: 4, name:'Last'}];
}
简单的方法:
public defaultCompetences: Array<number> = [1, 2, 3];
在组件/控制器中，然后:
<div ng-repeat="i in $ctrl.defaultCompetences track by $index">
这段代码来自我的typescript项目，但可以重新安排到纯javascript
下面是一个如何做到这一点的例子。请注意，我的灵感来自ng-repeat文档中的一个注释:http://jsfiddle.net/digitalzebra/wnWY6/
注意ng-repeat指令:
<div ng-app>
<div ng-controller="TestCtrl">
<div ng-repeat="a in range(5) track by $index">{{$index + 1}}</div>
</div>
</div>
这是控制器:
function TestCtrl($scope) {
$scope.range = function(n) {
return new Array(n);
};
};
你可以使用ng-if指令和ng-repeat
因此，如果num是元素需要重复的次数:
<li ng-repeat="item in list" ng-if="$index < num">
$scope.number = 5;
<div ng-repeat="n in [] | range:$scope.number">
<span>{{$index}}</span>
</div>
