0
我有服務,它有參數的異步初始化,我希望每個控制器都要等到init完成。加載控制器之前的離子服務初始化
問題是在參數變量init完成之前,控制器正在調用getObject方法。
服務:
angular.module('core')
.factory('localstorage', ['$window', '$cordovaSQLite', '$q',
function ($window, $cordovaSQLite, $q) {
var db;
var parameters = {};
if (window.cordova) {
db = $cordovaSQLite.openDB({name: "my.db"}); //device
} else {
db = window.openDatabase("my.db", '1', 'life', 1024 * 1024 * 100);
}
var promise = $q(function (resolve, reject) {
$cordovaSQLite.execute(db, "SELECT * FROM life_table")
.then(function (res) {
if (res.rows.length == 0) {
$cordovaSQLite.execute(db,
"CREATE TABLE IF NOT EXISTS life_table (key text primary key, value text)");
}
else {
for (var i = 0; i < res.rows.length; ++i) {
parameters[res.rows[i].key] = JSON.parse(res.rows[i].value);
}
}
resolve(parameters);
});
});
return {
promise: promise,
getObject: function (key) {
var query = "SELECT value FROM life_table where key = ?";
$cordovaSQLite.execute(db, query, [key]).then(function (res) {
if (res.rows.length > 0) {
console.log("getObject: " + res.rows[0].value);
}
}, function (err) {
console.error(err);
});
return parameters[key];
}
}
}]);
的配置:
.config(function ($stateProvider, $urlRouterProvider) {
$stateProvider
.state('navigator', {
url: '/',
abstract: true,
controller: 'NavigatorCtrl',
resolve: {
'MyServiceData': function (localstorage) {
// localstorage will also be injectable in the controller
return localstorage.promise;
}
}
})
.state('login', {
url: '/login',
templateUrl: 'templates/login.html',
controller: 'LoginCtrl',
controllerAs: 'loginCtrl',
resolve: {
'MyServiceData': function (localstorage) {
// localstorage will also be injectable in the controller
return localstorage.promise;
}
}
})