You need to create a service to be able to share data between controllers. app.factory('myService', function() { var savedData = {} function set(data) { savedData = data; } function get() { return savedData; } return { set: set, get: get } }); In your controller A: myService.set(yourSharedData); In your controller B: $scope.desiredLocation = myService.get(); Remember to inject myService in the controllers by passing it as a parameter.
If you only need to share data between views/scopes/controllers, the easiest way is to store it in $rootScope. However, if you need a shared function, it is better to define a service to do that.
app.controller('AController', function ($scope, $rootScope) {
$rootScope.varX = "XXX";
});
app.controller('BController', function ($scope, $rootScope) {
console.log("$rootScope.varX:", $rootScope.varX);
});
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做者:Ye Huang
連接:http://www.zhihu.com/question/33565135/answer/69651500
來源:知乎
1. 基於ui-router的頁面跳轉傳參(1) 在AngularJS的app.js中用ui-router定義路由,好比如今有兩個頁面,一個頁面(producers.html)放置了多個producers,點擊其中一個目標,頁面跳轉到對應的producer頁,同時將producerId這個參數傳過去。.state('producers', {
url: '/producers',
templateUrl: 'views/producers.html',
controller: 'ProducersCtrl'
})
.state('producer', {
url: '/producer/:producerId',
templateUrl: 'views/producer.html',
controller: 'ProducerCtrl'
})
(2) 在producers.html中,定義點擊事件,好比ng-click="toProducer(producerId)",在ProducersCtrl中,定義頁面跳轉函數 (使用ui-router的$state.go接口):.controller('ProducersCtrl', function ($scope, $state) {
$scope.toProducer = function (producerId) {
$state.go('producer', {producerId: producerId});
};
});
(3) 在ProducerCtrl中,經過ui-router的$stateParams獲取參數producerId,譬如:.controller('ProducerCtrl', function ($scope, $state, $stateParams) {
var producerId = $stateParams.producerId;
});
2. 基於factory的頁面跳轉傳參舉例:你有N個頁面,每一個頁面都須要用戶填選信息,最終引導用戶至尾頁提交,同時後一個頁面要顯示前面全部頁面填寫的信息。這個時候用factory傳參是比較合理的選擇(下面的代碼是一個簡化版,根據需求能夠不一樣定製):.factory('myFactory', function () {
//定義factory返回對象
var myServices = {};
//定義參數對象
var myObject = {};
/**
* 定義傳遞數據的set函數
* @param {type} xxx
* @returns {*}
* @private
*/
var _set = function (data) {
myObject = data;
};
/**
* 定義獲取數據的get函數
* @param {type} xxx
* @returns {*}
* @private
*/
var _get = function () {
return myObject;
};
// Public APIs
myServices.set = _set;
myServices.get = _get;
// 在controller中經過調set()和get()方法可實現提交或獲取參數的功能
return myServices;
});
3. 基於factory和$rootScope.$broadcast()的傳參(1) 舉例:在一個單頁中定義了nested views,你但願讓全部子做用域都監聽到某個參數的變化,而且做出相應動做。好比一個地圖應用,某個$state中定義元素input,輸入地址後,地圖要定位,同時另外一個狀態下的列表要顯示出該位置周邊商鋪的信息,此時多個$scope都在監聽地址變化。PS: $rootScope.$broadcast()能夠很是方便的設置全局事件,並讓全部子做用域都監聽到。.factory('addressFactory', ['$rootScope', function ($rootScope) {
// 定義所要返回的地址對象
var address = {};
// 定義components數組,數組包括街道,城市,國家等
address.components = [];
// 定義更新地址函數,經過$rootScope.$broadcast()設置全局事件'AddressUpdated'
// 全部子做用域都能監聽到該事件
address.updateAddress = function (value) {
this.components = value.slice();
$rootScope.$broadcast('AddressUpdated');
};
// 返回地址對象
return address;
}]);
(2) 在獲取地址的controller中:// 動態獲取地址,接口方法省略
var component = {
addressLongName: xxxx,
addressShortName: xxxx,
cityLongName: xxxx,
cityShortName: xxxx
};
// 定義地址數組
$scope.components = [];
$scope.$watch('components', function () {
// 將component對象推入$scope.components數組
components.push(component);
// 更新addressFactory中的components
addressFactory.updateAddress(components);
});
(3) 在監聽地址變化的controller中:// 經過addressFactory中定義的全局事件'AddressUpdated'監聽地址變化
$scope.$on('AddressUpdated', function () {
// 監聽地址變化並獲取相應數據
var street = address.components[0].addressLongName;
var city = address.components[0].cityLongName;
// 經過獲取的地址數據能夠作相關操做,譬如獲取該地址周邊的商鋪,下面代碼爲本人虛構
shopFactory.getShops(street, city).then(function (data) {
if(data.status === 200){
$scope.shops = data.shops;
}else{
$log.error('對不起,獲取該位置周邊商鋪數據出錯: ', data);
}
});
});
4. 基於localStorage或sessionStorage的頁面跳轉傳參注意事項:經過LS或SS傳參,必定要監聽變量,不然參數改變時,獲取變量的一端不會更新。AngularJS有一些現成的WebStorage dependency可使用,譬如gsklee/ngStorage · GitHub,grevory/angular-local-storage · GitHub。下面使用ngStorage來簡述傳參過程:(1) 上傳參數到localStorage - Controller A// 定義並初始化localStorage中的counter屬性
$scope.$storage = $localStorage.$default({
counter: 0
});
// 假設某個factory(此例暫且命名爲counterFactory)中的updateCounter()方法
// 能夠用於更新參數counter
counterFactory.updateCounter().then(function (data) {
// 將新的counter值上傳到localStorage中
$scope.$storage.counter = data.counter;
});
(2) 監聽localStorage中的參數變化 - Controller B$scope.counter = $localStorage.counter;
$scope.$watch('counter', function(newVal, oldVal) {
// 監聽變化,並獲取參數的最新值
$log.log('newVal: ', newVal);
});
http://www.zhihu.com/question/33565135html
service 到底這麼用?數組
...session