将绑定传递到组件中的嵌入范围 [英] Passing a binding to transcluded scope in component
问题描述
在 AngularJS 1.5 中,我想将一个组件的绑定传递到(多槽)内嵌作用域中 - 用于模板中的引用(在一个特定的或所有这些中 - 没有任何一种方式都可以).
In AngularJS 1.5, I want to pass a binding from a component into the (multi-slot) transcluded scope - for a reference in the template (in either one specific or all of them - no either way is fine).
这是为了创建一个通用的自定义选择列表
This is for creating a generic custom-select list
// Component
.component('mySelect', {
bind: {
collection: '<'
},
transclude:{
header: 'mySelectHeader',
item: 'mySelectItem'
},
templateUrl: 'my-select-template',
controller: function(){
.....
}
});
...
// Component template
<script id="my-select-template" type="text/ng-template">
<ol>
<li ng-transclude="header"> </li>
<li ng-transclude="item"
ng-click="$ctrl.select($item)"
ng-repeat"$item in $ctrl.collection">
</li>
</ol>
</script>
...
// Example usage
<my-select collection="[{id: 1, name: "John"}, {id: 2, name: "Erik"}, ... ]>
<my-select-head></my-select-head>
<!-- Reference to $item from ng-repeate="" in component -->
<my-select-item>{{$item.id}}: {{$item.name}}</my-select-item>
</my-select>
这可能来自 .component()
吗?带有 transclusion
的自定义指令?
Is this possible from a .component()
? with custom-directives for the transclusion
?
推荐答案
在你的父组件 my-select 中保留一个像 "selectedItem" 这样的变量
In your parent component my-select keep a variable like "selectedItem"
在你的子组件 my-select-item 中,像下面这样需要你的父组件
In your child component my-select-item, require your parent component like below
require: {
mySelect: '^mySelect'
}
在你的 my-select-item 组件的控制器中,访问你的父组件
And in your my-select-item component's controller, to access your parent component
$onInit = () => {
this.mySelectedItem= this.mySelect.selectedItem; // to use it inside my-select-item component.
};
select($item) {
this.mySelect.selectedItem = $item; // to change the selectedItem value stored in parent component
}
以便现在可以从以下位置访问所选项目
So that the selected item is now accessible from
<my-select-item>{{selectedItem.id}}: {{selectedItem.name}}</my-select-item>
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