最佳答案
AngularJS: ng-repeat 列表在模型元素从模型数组拼接时不会更新
我有两个控制器，并通过 app.Factory 函数在它们之间共享数据。
当单击链接时，第一个控制器在模型数组(pluginsDisplay)中添加一个小部件。小部件被推送到数组中，这个更改被反映到视图中(该视图使用 n- 重复显示数组内容) :
<div ng-repeat="pluginD in pluginsDisplayed">
<div k2plugin pluginname="{{pluginD.name}}" pluginid="{{pluginD.id}}"></div>
</div>
这个小部件是基于三个指令构建的，即 k2plugin、删除和调整大小。Move 指令将 span 添加到 k2plugin 指令的模板中。当单击 span 时，使用 Array.splice()删除共享数组中的右元素。共享数组已正确更新，但更改是在视图中反映的 没有。但是，当添加另一个元素时，在删除之后，视图将被正确刷新，并且不会显示以前删除的元素。
我哪里搞错了? 你能解释一下为什么这个不起作用吗？ 有没有更好的方法来做我正在尝试做的 AngularJS？
这是我的 index.html:
<!doctype html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.0.5/angular.min.js">
</script>
<script src="main.js"></script>
</head>
<body>
<div ng-app="livePlugins">
<div ng-controller="pluginlistctrl">
<span>Add one of {{pluginList.length}} plugins</span>
<li ng-repeat="plugin in pluginList">
<span><a href="" ng-click="add()">{{plugin.name}}</a></span>
</li>
</div>
<div ng-controller="k2ctrl">
<div ng-repeat="pluginD in pluginsDisplayed">
<div k2plugin pluginname="{{pluginD.name}}" pluginid="{{pluginD.id}}"></div>
</div>
</div>
</div>
</body>
</html>
这是我的主要观点:
var app = angular.module ("livePlugins",[]);
app.factory('Data', function () {
return {pluginsDisplayed: []};
});
app.controller ("pluginlistctrl", function ($scope, Data) {
$scope.pluginList = [{name: "plugin1"}, {name:"plugin2"}, {name:"plugin3"}];
$scope.add = function () {
console.log ("Called add on", this.plugin.name, this.pluginList);
var newPlugin = {};
newPlugin.id = this.plugin.name + '_' + (new Date()).getTime();
newPlugin.name = this.plugin.name;
Data.pluginsDisplayed.push (newPlugin);
}
})
app.controller ("k2ctrl", function ($scope, Data) {
$scope.pluginsDisplayed = Data.pluginsDisplayed;
$scope.remove = function (element) {
console.log ("Called remove on ", this.pluginid, element);
var len = $scope.pluginsDisplayed.length;
var index = -1;
// Find the element in the array
for (var i = 0; i < len; i += 1) {
if ($scope.pluginsDisplayed[i].id === this.pluginid) {
index = i;
break;
}
}
// Remove the element
if (index !== -1) {
console.log ("removing the element from the array, index: ", index);
$scope.pluginsDisplayed.splice(index,1);
}
}
$scope.resize = function () {
console.log ("Called resize on ", this.pluginid);
}
})
app.directive("k2plugin", function () {
return {
restrict: "A",
scope: true,
link: function (scope, elements, attrs) {
console.log ("creating plugin");
// This won't work immediately. Attribute pluginname will be undefined
// as soon as this is called.
scope.pluginname = "Loading...";
scope.pluginid = attrs.pluginid;
// Observe changes to interpolated attribute
attrs.$observe('pluginname', function(value) {
console.log('pluginname has changed value to ' + value);
scope.pluginname = attrs.pluginname;
});
// Observe changes to interpolated attribute
attrs.$observe('pluginid', function(value) {
console.log('pluginid has changed value to ' + value);
scope.pluginid = attrs.pluginid;
});
},
template: "<div>{{pluginname}} <span resize>_</span> <span remove>X</span>" +
"<div>Plugin DIV</div>" +
"</div>",
replace: true
};
});
app.directive("remove", function () {
return function (scope, element, attrs) {
element.bind ("mousedown", function () {
scope.remove(element);
})
};
});
app.directive("resize", function () {
return function (scope, element, attrs) {
element.bind ("mousedown", function () {
scope.resize(element);
})
};
});
