javascript – AngularJS ng-repeat重新渲染
作者:互联网
我正在使用AngularJS构建一个简单的应用程序.该应用程序对服务器进行异步AJAX调用,服务器返回如下数组:
{
paragraphs: [
{content: "content one"},
{content: "cnt two"},
{content: "random three"},
{content: "last one yeeaah"}
]
}
所以我通过set方法将此内容设置到StorageService工厂.这里一切都很好.
我正在使用ng-repeat来渲染结果,而JQuery UI可以排序以便能够更改元素的顺序.交换项目时,我的脚本正在调用StorageService.swap方法,并且StorageService中的元素顺序已更新,但是ng-repeat并未重新呈现更改,但是如果我删除/添加或更改其正在运行的内容.我如何强制角度重新渲染ng-repeat?
= JSFIDDLE =
=示例=
当发生交换时,应重新呈现ng-repeat,因此ID是连续的
=代码=
HTML
<div ng-controller="Test" sortable>
<div ng-repeat="item in data().paragraphs" class="box slide_content" id="{{$index}}">
{{item.content}}, ID: {{$index}}
</div>
<input type="button" ng-click="add()" value="Add">
</div>
JS
var App = angular.module("MyApp", []);
App.controller("Test", function($scope, StorageService) {
StorageService.set({
paragraphs: [
{content: "content one"},
{content: "cnt two"},
{content: "random three"},
{content: "last one yeeaah"}
]
});
$scope.data = StorageService.get;
$scope.add = StorageService.add;
});
App.directive("sortable", function(StorageService) {
return {
link: function(scope, element, attrs) {
$(element[0]).sortable({
cancel: ".disabled",
items: "> .slide_content:not(.disabled)",
start: function(e, t) {
t.item.data("start_pos", t.item.index());
},
stop: function(e, t) {
var r = t.item.data("start_pos");
if (r != t.item.index()) {
StorageService.sort($(this).sortable("toArray"));
}
}
});
}
};
});
App.factory('StorageService', function() {
var output = {};
return {
set: function(data) {
angular.copy(data, output);
return output;
},
get: function() {
return output;
},
add: function() {
output.paragraphs.push({
content: 'Content'
});
},
sort: function(order) {
var localOutput = [];
for (var j in order) {
var id = parseInt(order[j]);
localOutput.push(output.paragraphs[id]);
}
console.log('new order', localOutput);
output.paragraphs = localOutput;
return output;
}
};
});
解决方法:
Angular不知道你已经改变了数组.在范围内执行排序.$apply()将解决这个问题.
请注意,我添加了一个变量,因为这会改变apply中的含义.
var that = this;
scope.$apply(function() {
StorageService.sort($(that).sortable("toArray"));
}
但是这个解决方案揭示了其他问题,这些问题似乎是由jQuery sortable和Angular之间的交互引起的(这里的fiddle表示试图解决问题,但仍有问题).这些问题已于Angular UI Sortable解决.因此,向前迈进的良好道路可能就是转向这一问题.
标签:javascript,angularjs,rendering,angularjs-ng-repeat,jquery-ui-sortable 来源: https://codeday.me/bug/20190624/1280781.html