d-_*_*_-b 5 javascript angularjs
使用Angular JS的ngRepeat指令,我怎样才能使得生成的迭代以相反的顺序进行？我正在使用一个对象,其中键是数字,我想按那些排序,降序.
我知道你不能用这样的键对对象进行真正的排序(不保留对数组的引用),但这对Angular来说是否可能？
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.9/angular.min.js"></script>
<body>
<script>
var app = angular.module('myApp', []);
app.filter('orderObjectBy', function() {
return function(items, field, reverse) {
var filtered = [];
angular.forEach(items, function(item) {
filtered.push(item);
});
filtered.sort(function(a, b) {
return (a[field] > b[field] ? 1 : -1);
});
if (reverse) filtered.reverse();
return filtered;
};
});
app.controller('myController', ['$scope',
function($scope) {
$scope.data = {
2013: 'oldest 4',
2014: 'older 3',
2015: 'new 2',
2016: 'newest 1'
};
}
]);
</script>
<div id="myApp" ng-app='myApp' ng-controller="myController">
<div ng-repeat="(date,text) in data">{{text}}</div>
<hr/>
<div ng-repeat="(date,text) in data | orderBy:date:reverse">{{text}}</div>
<hr/>
<div ng-repeat="(date,text) in data | orderBy:'-date'">{{text}}</div>
<hr/>
<div><b>Correct Answer!:</b></div><hr/>
<div ng-repeat="(date,text) in data | orderObjectBy:date:true">{{text}}</div>
</div>
</body>例如,我想从最近到最旧的排序(与此代码中的相反)
ng-repeat不能与对象一起使用,您需要创建自定义过滤器.
<div ng-repeat="(date,text) in data | orderObjectBy:date:true">{{text}}</div>
app.filter('orderObjectBy', function() {
return function(items, field, reverse) {
var filtered = [];
angular.forEach(items, function(item) {
filtered.push(item);
});
filtered.sort(function (a, b) {
return (a[field] > b[field] ? 1 : -1);
});
if(reverse) filtered.reverse();
return filtered;
};
});
希望能帮助到你 :)