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 ){
$scope.FirstName = Data.FirstName;
});
任何帮助都非常感激。
还有另一种不用$watch的方法，使用angular.copy:
var myApp = angular.module('myApp', []);
myApp.factory('Data', function(){
var service = {
FirstName: '',
setFirstName: function(name) {
// this is the trick to sync the data
// so no need for a $watch function
// call this from anywhere when you need to update FirstName
angular.copy(name, service.FirstName);
}
};
return service;
});
// Step 1 Controller
myApp.controller('FirstCtrl', function( $scope, Data ){
});
// Step 2 Controller
myApp.controller('SecondCtrl', function( $scope, Data ){
$scope.FirstName = Data.FirstName;
});
还有另一种不用$watch的方法，使用angular.copy:
var myApp = angular.module('myApp', []);
myApp.factory('Data', function(){
var service = {
FirstName: '',
setFirstName: function(name) {
// this is the trick to sync the data
// so no need for a $watch function
// call this from anywhere when you need to update FirstName
angular.copy(name, service.FirstName);
}
};
return service;
});
// Step 1 Controller
myApp.controller('FirstCtrl', function( $scope, Data ){
});
// Step 2 Controller
myApp.controller('SecondCtrl', function( $scope, Data ){
$scope.FirstName = Data.FirstName;
});
有多种方法可以做到这一点。
事件——已经解释得很好了。
UI路由器-上面解释了。
Service -使用上面显示的更新方法
坏——注意变化。
另一种父-子方法而不是发射和广播-
*
<superhero flight speed strength> Superman is here! </superhero>
<superhero speed> Flash is here! </superhero>
*
app.directive('superhero', function(){
return {
restrict: 'E',
scope:{}, // IMPORTANT - to make the scope isolated else we will pollute it in case of a multiple components.
controller: function($scope){
$scope.abilities = [];
this.addStrength = function(){
$scope.abilities.push("strength");
}
this.addSpeed = function(){
$scope.abilities.push("speed");
}
this.addFlight = function(){
$scope.abilities.push("flight");
}
},
link: function(scope, element, attrs){
element.addClass('button');
element.on('mouseenter', function(){
console.log(scope.abilities);
})
}
}
});
app.directive('strength', function(){
return{
require:'superhero',
link: function(scope, element, attrs, superHeroCtrl){
superHeroCtrl.addStrength();
}
}
});
app.directive('speed', function(){
return{
require:'superhero',
link: function(scope, element, attrs, superHeroCtrl){
superHeroCtrl.addSpeed();
}
}
});
app.directive('flight', function(){
return{
require:'superhero',
link: function(scope, element, attrs, superHeroCtrl){
superHeroCtrl.addFlight();
}
}
});
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>
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);
});
我已经创建了一个工厂来控制路由路径模式之间的共享作用域，因此您可以在用户在相同的路由父路径中导航时维护共享数据。
.controller('CadastroController', ['$scope', 'RouteSharedScope',
function($scope, routeSharedScope) {
var customerScope = routeSharedScope.scopeFor('/Customer');
//var indexScope = routeSharedScope.scopeFor('/');
}
])
因此，如果用户转到另一个路由路径，例如'/Support'，路径'/Customer'的共享数据将被自动销毁。但是，如果用户去到“子”路径，比如“/Customer/1”或“/Customer/list”，作用域不会被销毁。
您可以在这里看到一个示例:http://plnkr.co/edit/OL8of9
