我正在尝试跨控制器共享数据。用例是一种多步骤形式，在一个输入中输入的数据稍后将用于原始控制器之外的多个显示位置。下面和jsfiddle中的代码。
HTML
<div ng-controller="FirstCtrl">
<input type="text" ng-model="FirstName"><!-- Input entered here -->
<br>Input is : <strong>{{FirstName}}</strong><!-- Successfully updates here -->
</div>
<hr>
<div ng-controller="SecondCtrl">
Input should also be here: {{FirstName}}<!-- How do I automatically updated it here? -->
</div>
JS
// declare the app with no dependencies
var myApp = angular.module('myApp', []);
// make a factory to share data between controllers
myApp.factory('Data', function(){
// I know this doesn't work, but what will?
var FirstName = '';
return FirstName;
});
// Step 1 Controller
myApp.controller('FirstCtrl', function( $scope, Data ){
});
// Step 2 Controller
myApp.controller('SecondCtrl', function( $scope, Data ){
$scope.FirstName = Data.FirstName;
});
任何帮助都非常感激。
有多种方法可以在控制器之间共享数据
角服务
$broadcast， $emit方法
父到子控制器通信
rootscope美元
众所周知，$rootscope不是数据传输或通信的首选方式，因为它是一个全局作用域，可用于整个应用程序
对于Angular Js控制器之间的数据共享，Angular服务是最佳实践，例如.factory， .service
供参考
如果数据从父控制器传输到子控制器，您可以通过$scope直接访问子控制器中的父数据
如果你正在使用ui-router，那么你可以使用$stateParmas来传递url参数，如id，名称，键等
$broadcast也是在控制器之间从父控制器传输数据到子控制器的好方法，$emit是将数据从子控制器传输到父控制器的好方法
HTML
<div ng-controller="FirstCtrl">
<input type="text" ng-model="FirstName">
<br>Input is : <strong>{{FirstName}}</strong>
</div>
<hr>
<div ng-controller="SecondCtrl">
Input should also be here: {{FirstName}}
</div>
JS
myApp.controller('FirstCtrl', function( $rootScope, Data ){
$rootScope.$broadcast('myData', {'FirstName': 'Peter'})
});
myApp.controller('SecondCtrl', function( $rootScope, Data ){
$rootScope.$on('myData', function(event, data) {
$scope.FirstName = data;
console.log(data); // Check in console how data is coming
});
});
参考给出的链接了解更多关于$broadcast的信息
有许多方法可以在控制器之间共享数据
使用服务
使用美元的状态。去服务
使用stateparams
使用rootscope
各方法说明:
I am not going to explain as its already explained by someone
using $state.go
$state.go('book.name', {Name: 'XYZ'});
// then get parameter out of URL
$state.params.Name;
$stateparam works in a similar way to $state.go, you pass it as object from sender controller and collect in receiver controller using stateparam
using $rootscope
(a) sending data from child to parent controller
$scope.Save(Obj,function(data) {
$scope.$emit('savedata',data);
//pass the data as the second parameter
});
$scope.$on('savedata',function(event,data) {
//receive the data as second parameter
});
(b) sending data from parent to child controller
$scope.SaveDB(Obj,function(data){
$scope.$broadcast('savedata',data);
});
$scope.SaveDB(Obj,function(data){`enter code here`
$rootScope.$broadcast('saveCallback',data);
});
正如@MaNn在接受的答案的一个评论中指出的那样，如果页面被刷新，解决方案将无法工作。
解决方案是使用localStorage或sessionStorage来临时持久化希望跨控制器共享的数据。
Either you make a sessionService whose GET and SET method, encrypts and decrypts the data and reads the data from either localStorage or sessionStorage. So now you use this service directly to read and write the data in the storage via any controller or service you want. This is a open approach and easy one
Else you make a DataSharing Service and use localStorage inside it - so that if the page is refreshed the service will try and check the storage and reply back via the Getters and Setters you have made public or private in this service file.
最简单的解决方案:
我使用了AngularJS服务。
我已经创建了一个名为SharedDataService的AngularJS服务。
myApp.service('SharedDataService', function () {
var Person = {
name: ''
};
return Person;
});
步骤2:创建两个控制器并使用上面创建的服务。
//First Controller
myApp.controller("FirstCtrl", ['$scope', 'SharedDataService',
function ($scope, SharedDataService) {
$scope.Person = SharedDataService;
}]);
//Second Controller
myApp.controller("SecondCtrl", ['$scope', 'SharedDataService',
function ($scope, SharedDataService) {
$scope.Person = SharedDataService;
}]);
步骤3:在视图中使用已创建的控制器。
<body ng-app="myApp">
<div ng-controller="FirstCtrl">
<input type="text" ng-model="Person.name">
<br>Input is : <strong>{{Person.name}}</strong>
</div>
<hr>
<div ng-controller="SecondCtrl">
Input should also be here: {{Person.name}}
</div>
</body>
要查看此问题的工作解决方案，请按下面的链接
https://codepen.io/wins/pen/bmoYLr
. html文件:
<!DOCTYPE html>
<html>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"></script>
<body ng-app="myApp">
<div ng-controller="FirstCtrl">
<input type="text" ng-model="Person.name">
<br>Input is : <strong>{{Person.name}}</strong>
</div>
<hr>
<div ng-controller="SecondCtrl">
Input should also be here: {{Person.name}}
</div>
//Script starts from here
<script>
var myApp = angular.module("myApp",[]);
//create SharedDataService
myApp.service('SharedDataService', function () {
var Person = {
name: ''
};
return Person;
});
//First Controller
myApp.controller("FirstCtrl", ['$scope', 'SharedDataService',
function ($scope, SharedDataService) {
$scope.Person = SharedDataService;
}]);
//Second Controller
myApp.controller("SecondCtrl", ['$scope', 'SharedDataService',
function ($scope, SharedDataService) {
$scope.Person = SharedDataService;
}]);
</script>
</body>
</html>
有多种方法可以在控制器之间共享数据
角服务
$broadcast， $emit方法
父到子控制器通信
rootscope美元
众所周知，$rootscope不是数据传输或通信的首选方式，因为它是一个全局作用域，可用于整个应用程序
对于Angular Js控制器之间的数据共享，Angular服务是最佳实践，例如.factory， .service
供参考
如果数据从父控制器传输到子控制器，您可以通过$scope直接访问子控制器中的父数据
如果你正在使用ui-router，那么你可以使用$stateParmas来传递url参数，如id，名称，键等
$broadcast也是在控制器之间从父控制器传输数据到子控制器的好方法，$emit是将数据从子控制器传输到父控制器的好方法
HTML
<div ng-controller="FirstCtrl">
<input type="text" ng-model="FirstName">
<br>Input is : <strong>{{FirstName}}</strong>
</div>
<hr>
<div ng-controller="SecondCtrl">
Input should also be here: {{FirstName}}
</div>
JS
myApp.controller('FirstCtrl', function( $rootScope, Data ){
$rootScope.$broadcast('myData', {'FirstName': 'Peter'})
});
myApp.controller('SecondCtrl', function( $rootScope, Data ){
$rootScope.$on('myData', function(event, data) {
$scope.FirstName = data;
console.log(data); // Check in console how data is coming
});
});
参考给出的链接了解更多关于$broadcast的信息
只需简单地执行(在v1.3.15中测试):
<article ng-controller="ctrl1 as c1">
<label>Change name here:</label>
<input ng-model="c1.sData.name" />
<h1>Control 1: {{c1.sData.name}}, {{c1.sData.age}}</h1>
</article>
<article ng-controller="ctrl2 as c2">
<label>Change age here:</label>
<input ng-model="c2.sData.age" />
<h1>Control 2: {{c2.sData.name}}, {{c2.sData.age}}</h1>
</article>
<script>
var app = angular.module("MyApp", []);
var dummy = {name: "Joe", age: 25};
app.controller("ctrl1", function () {
this.sData = dummy;
});
app.controller("ctrl2", function () {
this.sData = dummy;
});
</script>
