我已经仔细阅读了AngularJS关于这个主题的文档，然后摆弄了一个指令。这是小提琴。
以下是一些相关片段:
来自HTML: <窗格bi-title = "标题" title =“{{标题}}>{{文本}}> < /窗格 从窗格指令: scope: {biTitle: '='， title: '@'， bar: '='}，
有几件事我不明白:
为什么我必须使用“{{title}}”与“@”和“title”与“=”? 我也可以直接访问父范围，而不装饰我的元素与属性? 文档说:“通常情况下，通过表达式将数据从孤立的作用域传递到父作用域是可取的”，但这似乎也适用于双向绑定。为什么表达式路由会更好呢?
我发现另一个小提琴，显示表达式解决方案太:http://jsfiddle.net/maxisam/QrCXh/
当前回答
这里有很多很好的答案，但我想就@、=和&绑定之间的差异提供我的观点，这对我来说很有用。
这三种绑定都是通过元素属性将数据从你的父作用域传递到你指令的隔离作用域的方法:
@ binding is for passing strings. These strings support {{}} expressions for interpolated values. For example: . The interpolated expression is evaluated against directive's parent scope. = binding is for two-way model binding. The model in parent scope is linked to the model in the directive's isolated scope. Changes to one model affects the other, and vice versa. & binding is for passing a method into your directive's scope so that it can be called within your directive. The method is pre-bound to the directive's parent scope, and supports arguments. For example if the method is hello(name) in parent scope, then in order to execute the method from inside your directive, you must call $scope.hello({name:'world'})
我发现通过一个更短的描述来参考作用域绑定更容易记住这些区别:
@属性字符串绑定 =双向模型绑定 &回调方法绑定
这些符号还可以更清楚地说明作用域变量在指令实现中的含义:
@字符串 =模型 &方法
按用处排序(至少对我来说):
＝ @ ＆
其他回答
@属性字符串绑定(单向) =双向模型绑定 &回调方法绑定
=方法是双向绑定，它允许你在指令中进行实时更改。当有人在指令外更改变量时，你将在指令内拥有更改的数据，但@ way不是双向绑定。它像文本一样工作。你绑定一次，你就只有它的值。
为了更清楚地理解它，你可以使用这篇很棒的文章:
AngularJS指令作用域'@'和'='
这里有很多很好的答案，但我想就@、=和&绑定之间的差异提供我的观点，这对我来说很有用。
这三种绑定都是通过元素属性将数据从你的父作用域传递到你指令的隔离作用域的方法:
@ binding is for passing strings. These strings support {{}} expressions for interpolated values. For example: . The interpolated expression is evaluated against directive's parent scope. = binding is for two-way model binding. The model in parent scope is linked to the model in the directive's isolated scope. Changes to one model affects the other, and vice versa. & binding is for passing a method into your directive's scope so that it can be called within your directive. The method is pre-bound to the directive's parent scope, and supports arguments. For example if the method is hello(name) in parent scope, then in order to execute the method from inside your directive, you must call $scope.hello({name:'world'})
我发现通过一个更短的描述来参考作用域绑定更容易记住这些区别:
@属性字符串绑定 =双向模型绑定 &回调方法绑定
这些符号还可以更清楚地说明作用域变量在指令实现中的含义:
@字符串 =模型 &方法
按用处排序(至少对我来说):
＝ @ ＆
我一次性实现了所有可能的选项。
它处理所有的选项:
scope:{
name:'&'
},
scope:{
name:'='
},
scope:{
name:'@'
},
scope:{
},
scope:true,
https://jsfiddle.net/rishulmatta/v7xf2ujm
如果您想通过一个现场示例了解更多这是如何工作的。http://jsfiddle.net/juanmendez/k6chmnch/
var app = angular.module('app', []);
app.controller("myController", function ($scope) {
$scope.title = "binding";
});
app.directive("jmFind", function () {
return {
replace: true,
restrict: 'C',
transclude: true,
scope: {
title1: "=",
title2: "@"
},
template: "<div><p>{{title1}} {{title2}}</p></div>"
};
});
