我有这种感觉,仅仅靠简单的决心是不可能做我想做的事的。
基本上,我需要一种在 ui-router 路由中解析属性的方法,然后稍后更新该属性或让它解析两次。
例如,您有一个帖子页面,它将从缓存加载帖子,显示页面,然后向远程服务器发送请求(可能会成功,也可能不会成功)并更新已解析的属性有了新的信息。
有人知道处理这个问题的最佳方法吗?
最佳答案
以下是使用自定义 localStorage 和充当 DAL 的 dataService 的解决方案的基本示例。您可以告诉它使用缓存数据或获取“新鲜数据”(您可以在其中访问 API),然后将该数据返回到 Controller 进行渲染。这是它的基本实现,并不意味着成为您的完整解决方案,而是让您走上正确的轨道,完成您想做的事情。
angular.module('app.factories', [])
.factory('localStorage', function() {
var dummyData = [{
'id': 1,
'someProperty': 1,
'someOtherProperty': 2
}, {
'id': 2,
'someProperty': 3,
'someOtherProperty': 4
}];
return {
supported: function() {
return true; // SO restriction won't let me use localStorage, fair enough, just mock it
//return 'localStorage' in window && window['localStorage'] !== null;
},
get: function(key) {
return dummyData;
//return localStorage[key];
},
set: function(key, value) {
//localStorage[key] = value;
}
}
})
.factory('dataService', ['$http', '$q', 'localStorage',
function($http, $q, local) {
return {
get: function(useCached) {
var cachedData = local.supported() && useCached ? local.get('data') : undefined;
var dummyData = [{
'id': 1,
'someProperty': 1,
'someOtherProperty': 2
}, {
'id': 2,
'someProperty': 3,
'someOtherProperty': 4
}];
var deferred = $q.defer(),
promise = deferred.promise;
if (cachedData) {
console.log('using cachedData in get()');
deferred.resolve(cachedData);
} else {
console.log('getting fresh data in get()');
local.set('data', dummyData);
deferred.resolve(dummyData);
}
return promise;
},
getById: function(id, useCached) {
var cachedData = local.supported() && useCached ? local.get('data' + id) : undefined;
var dummyForId1 = {
'id': 1,
'someProperty': 5,
'someOtherProperty': 6
},
dummyForId2 = {
'id': 2,
'someProperty': 7,
'someOtherProperty': 8
};
var deferred = $q.defer(),
promise = deferred.promise;
if (cachedData) {
console.log('using cachedData in getById()');
deferred.resolve(cachedData);
} else {
console.log('getting fresh data in getById(' + id + ')');
if (id === 1) {
local.set('data1', dummyForId1);
deferred.resolve(dummyForId1);
} else if (id === 2) {
local.set('data2', dummyForId2);
deferred.resolve(dummyForId2);
}
}
return promise;
}
}
}
]);
angular.module('app', ['ngRoute', 'app.factories'])
.config(['$routeProvider',
function($routeProvider) {
$routeProvider.when('/', {
controller: 'homeCtrl',
template: '<span>This is the home page</span><br /><div ng-repeat="item in data">{{item.someProperty}}, {{item.someOtherProperty}} <button ng-click="refreshMe(item)">Refresh Me!</button></div>',
resolve: {
data: ['dataService',
function(dataService) {
return dataService.get(true).then(function(response) {
return response;
});
}
]
}
});
}
])
.controller('homeCtrl', ['$scope', 'dataService', 'data',
function($scope, dataService, data) {
console.log('in homeCtrl');
$scope.data = data;
$scope.refreshMe = function(item) {
console.log(item)
dataService.getById(item.id).then(function(response) {
console.log(response);
item.someProperty = response.someProperty;
item.someOtherProperty = response.someOtherProperty;
});
}
}
]);
<!DOCTYPE html>
<html ng-app="app">
<head>
<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.3.2/angular.min.js"></script>
<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.3.2/angular-route.min.js"></script>
<meta charset="utf-8">
<title>JS Bin</title>
</head>
<body>
<dib ng-view>
</div>
</body>
</html>
关于javascript - ui-router,如何解析本地结果,然后解析远程结果,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/29702964/