Angular.js 将参数传递给指令 [英] Angular.js passing parameter to directive

问题描述

我是 Angular 的新手，所以如果这个问题的答案非常基本，请不要感到惊讶.

我正在尝试将地图封装在指令中，该地图将具有一些自定义行为:我希望它与服务通信以检索与商家相关的所有点.

所以我想将 merchant 作为参数传递给指令:

这是 HTML:

<div ng-controller="Ctrl1"><p>Ctrl 1: {{merchant1}}</p><map MerchantDetails="{{merchant1}}"></map>

这是javascript:

var myApp = angular.module('myApp', []);myApp.controller('Ctrl1', function ($scope) {$scope.merchant1 = "foo"});myApp.controller('Ctrl2', function ($scope) {$scope.merchant2 = "bar"}).directive('map', function () {返回 {限制:'E'，链接:函数(范围、元素、属性、控制器){scope.merchant2 = attrs.merchantDetails;},范围: {商户详情:"@"},模板:'Ctrl2:{{merchant2}}'}});

问题是模板中的 scope.merchant2 永远不会更新.我希望它有foo"，或者最坏的bar"，而不是空白.

当我在 Chrome 中调试时，控制器 Ctrl2 初始化从未执行.为什么?我希望它在链接阶段之前完成.

如何将foo"值传递给 Ctrl2?

jsfiddle 在这里可用.

解决方案

您实际上不需要第二个控制器.我更新了提琴手，请检查它是否是您需要的:

https://jsfiddle.net/e7cfcakv/7/

<div ng-controller="Ctrl1"><p>Ctrl 1: {{merchant1}}</p><map Merchant-details="{{merchant1}}"></map>

var myApp = angular.module('myApp', []);myApp.controller('Ctrl1', function ($scope) {$scope.merchant1 = "foo"});myApp.directive('map', function () {返回 {限制:'E'，链接:函数(范围、元素、属性、控制器){scope.merchant2 = scope.merchantDetails;},范围: {商户详情:"@"},模板:'Ctrl2:{{merchant2}}'}});

I'm a newbie at Angular, so don't be surprise if the answer to this question is pretty basic.

I'm trying to encapsulate a map in a directive, the map will have some custom behavior: I want it to communicate with a Service to retrieve all the points related to a merchant.

So I want to pass the merchant as a parameter to the directive:

This is the HTML:

<div ng-app="myApp">
    <div ng-controller="Ctrl1">
        <p>Ctrl 1: {{merchant1}}</p>
        <map merchantDetails="{{merchant1}}"></map>
    </div>
</div>

This is the javascript:

var myApp = angular.module('myApp', []);

myApp.controller('Ctrl1', function ($scope) {
    $scope.merchant1 = "foo"
});

myApp.controller('Ctrl2', function ($scope) {
    $scope.merchant2 = "bar"
})
    .directive('map', function () {
    return {
        restrict: 'E',
        link: function (scope, element, attrs, controller) {
            scope.merchant2 = attrs.merchantDetails;
        },
        scope: {
            merchantDetails: "@"
        },
        template: 'Ctrl2: {{merchant2}}'
    }

});

The problem is that scope.merchant2 at the template never gets updated. I would like it to have "foo", or at worst "bar", not blank.

When I debug this in Chrome, controller Ctrl2 initialization is never executed. Why? I would expect it to be done before the link phase.

How do I do to get the "foo" value passed to Ctrl2?

The jsfiddle is available here.

解决方案

You actually don't need the second controller. I update the fiddler, please check if it's what you need:

https://jsfiddle.net/e7cfcakv/7/

<div ng-app="myApp">
    <div ng-controller="Ctrl1">
        <p>Ctrl 1: {{merchant1}}</p>
        <map merchant-details="{{merchant1}}"></map>
    </div>
</div>

var myApp = angular.module('myApp', []);

myApp.controller('Ctrl1', function ($scope) {
    $scope.merchant1 = "foo"
});

myApp.directive('map', function () {
    return {
        restrict: 'E',
        link: function (scope, element, attrs, controller) {
            scope.merchant2 = scope.merchantDetails;
        },
        scope: {
            merchantDetails: "@"
        },
        template: 'Ctrl2: {{merchant2}}'
    }
});

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