工廠更新時爲什麼沒有計算的數量更新？

Question

我有一個簡單的工廠這樣

angular.module('posBitcoinApp') 
.factory('invoiceData', function ($http, $interval) { 

var blockchainInfoExchangeRates = {}; 

var getLatestExchangeRates = function() { 

    $http.get('https://api.bitcoinaverage.com/ticker/global/IDR/') 
    .success(function(response) { 
     blockchainInfoExchangeRates.IDR = response.last; 
    }); 
}; 

$interval(getLatestExchangeRates, 60000); 
getLatestExchangeRates(); 

return { 
    exchangeRates: blockchainInfoExchangeRates 
}; 

}); 

然後在我的控制器我有一個...

angular.module('posBitcoinApp') 
.controller('InvoiceCtrl', function ($scope, $http, $interval, $location, invoiceData) { 

$scope.invoiceData = invoiceData; 
$scope.invoiceData.btcAmount = parseFloat($scope.invoiceData.idrAmount/$scope.invoiceData.exchangeRates.IDR).toFixed(8); 

所以每一分鐘的匯率得到更新。但是，計算出的BTC值（$ scope.invoiceData.btcAmount）不會自動更新。我錯過了什麼？有什麼東西需要觀看？ $ scope.apply（）在哪裏？

謝謝。

Answer 1

即使您在工廠刷新數據，它也不會反映，因爲您正在返回數據。而不是你必須每隔一分鐘刷新一次scope.invoiceData.btcAmount。

Var updateBTC = function(){ 
//call to factory if you want to avoid having an interval inside factory to update data and use the result in the below statement. 
    $scope.invoiceData.btcAmount = parseFloat($scope.invoiceData.idrAmount/$scope.invoiceData.exchangeRates.IDR).toFixed(8); 
}; 

$interval(updateBTC, 60000);