Question

我尝试使用来自api的数据更新dom，但是我得到了＆＃34; $ watch未定义＆＃34;这是我的ctrl

app.controller('counter', ['$scope', 'factory', function ($scope, factory) {
    factory.get(function (res) {
        $scope.proizvedeno = res;
        $scope.output = $scope.proizvedeno.total_energy_output;

        $scope.countTo = $scope.output;
        $scope.countFrom = 0;
$scope.$watch("output", $scope.countTo)
console.log($watch);

        $scope.reCount = function () {
            $scope.countFrom = Math.ceil(Math.random() * 300);
            $scope.countTo = Math.ceil(Math.random() * 7000) - Math.ceil(Math.random() * 600);
        }; }]);

我尝试添加监视功能，自动更新dom，但这不起作用。有人可以帮我。

Answer 1

让我把它作为答案，这样就会给问题带来更多app.controller('counter', ['$scope', 'factory', function ($scope, factory) { factory.get(function (res) { $scope.proizvedeno = res; $scope.output = $scope.proizvedeno.total_energy_output; $scope.countTo = $scope.output; $scope.countFrom = 0; $scope.$watch("output", $scope.countTo) //Changed this console.log($watch); //removed this line $scope.reCount = function () { $scope.countFrom = Math.ceil(Math.random() * 300); $scope.countTo = Math.ceil(Math.random() * 7000) - Math.ceil(Math.random() * 600); }; }]);。

您的实际代码：

app.controller('counter', ['$scope', 'factory', function ($scope, factory) {
    factory.get(function (res) {
        $scope.proizvedeno = res;
        $scope.output = $scope.proizvedeno.total_energy_output;

        $scope.countTo = $scope.output;
        $scope.countFrom = 0;
        $scope.$watch("output", 
                 function handleChange( newValue, oldValue ) {
                    console.log( "$scope.output:", newValue );
        })

        $scope.reCount = function () {
            $scope.countFrom = Math.ceil(Math.random() * 300);
            $scope.countTo = Math.ceil(Math.random() * 7000) - Math.ceil(Math.random() * 600);
        }; }]);

改革后的一个：

{{1}}

Answer 2

大家好我用超时修复此问题，我不知道这是最好的解决方案，但这对我有用。 Thnx对所有人

app.controller('counter', ['$scope', '$http', '$timeout',  function ($scope, $http, $timeout) {
$scope.reload = function () {              //add new function for timer
$http.get(serviceBase + 'live-stats').
    success(function (res) {
         $scope.proizvedeno = res;

            $scope.wireless_charging_count = $scope.proizvedeno.wireless_charging_count;
            $scope.countTo3 = $scope.wireless_charging_count;
            $scope.countFrom3 = 0;
            $scope.reCount = function () {
            $scope.countFrom3 = Math.ceil(Math.random() * 300);
                    $scope.countTo3 = Math.ceil(Math.random() * 7000) - Math.ceil(Math.random() * 600);
            };

         });
         var reload = $timeout(function(){          //set here $timeout
            $scope.reload();
            }, 5000);
            $scope.$on('$destroy', function(){      //must cancel $timeout
$timeout.cancel(reload);
});  
     };
    $scope.reload();     
}]);

U必须取消计时器，否则你会遇到类似我的问题:)，在更改路由计时器仍在工作并从网址重新加载数据之后。 Thnx对每个人

更新dom不使用$ watch

2 个答案: