我正在连接到工厂中的websocket提要,它为我提供了实时的比特币价格数据。
我在websocketFactory
中将service.prices
定义为对象,并在控制器中设置wsvm.prices = websocketFactory.prices
。
wsvm.prices.btc
属性未在视图中更新,但在控制台中正确记录。
法典:
厂
app.factory('websocketFactory', ['$http', function($http) {
var service = {}
service.prices = {
"btc": 0
}
service.gdax = function() {
const socket = new WebSocket('wss://ws-feed.gdax.com')
var message = {
"type": "subscribe",
"channels": [{
"name": "ticker",
"product_ids": [
"BTC-USD"
]
}, ]
}
socket.addEventListener('open', function(event) {
socket.send(JSON.stringify(message));
})
// Listen for messages
socket.addEventListener('message', function(event) {
var dataObj = JSON.parse(event.data)
if (dataObj.price) {
console.log(dataObj.price) //logging real time data
service.prices.btc = dataObj.price //this should be updating the view
}
});
}
return service
}])
控制器
app.controller('WebsocketController', WebsocketController)
WebsocketController.$inject = ['$scope', 'websocketFactory']
function WebsocketController($scope, websocketFactory) {
var wsvm = this
wsvm.prices = websocketFactory.prices
websocketFactory.gdax()
}
视图
<div ng-controller="PortfolioController as vm">
<div class="row">
<div class="col-sm-6">
<h2 style="text-align: center;">Account Balances</h2>
</div>
<div class="col-sm-6">
<table class="table">
<thead>
<tr>
<td>24h Change</td>
<td>Total Val USD</td>
<td>BTC Price</td>
</tr>
</thead>
<tbody>
<tr>
<td ng-class="{change_loss: vm.totals.change_24h_usd < 0, change_win: vm.totals.change_24h_usd > 0}"><b>{{vm.totals.change_24h_usd | currency}}</b></td>
<td><b>{{vm.totals.total_usd | currency}}</b></td>
<td ng-controller="WebsocketController as wsvm">{{wsvm.prices.btc}}</td>
</tr>
</tbody>
</table>
</div>
</div>
如何正确绑定工厂和控制器以获取实时数据?
在套接字侦听器中更改作用域是在角度上下文之外的。每当发生这种情况时,都需要通知角度以运行摘要以更新视图
请尝试以下操作:
app.factory('websocketFactory', ['$http', '$rootScope', function($http, $rootScope) {
......
socket.addEventListener('message', function(event) {
var dataObj = JSON.parse(event.data)
if (dataObj.price) {
console.log(dataObj.price) //logging real time data
$rootScope.$apply(function(){
service.prices.btc = dataObj.price //this should be updating the view
});
}
});
});
我还建议您寻找一个角度插座模块,它将在内部为您处理所有这些问题