AngularJS输入字段不是从里面的setTimeout更新控制器

更新时间：2023-10-29 23:48:34

您需要使用 $范围。$适用（）或angulars $超时来体现的变化，因为是的setTimeout的angularjs范围

之外

使用$范围。$适用（）

适用范围$。$适用（）setTimeout的匿名函数内（函数（）{}，1000），然后调用类的实际功能如下

 （功能updateCDT（）{
        $ scope.formData.currentDateTime =新的日期（）的toString（）。
        的document.getElementById（currentDateTime）。innerHTML的
  = $ scope.formData.currentDateTime;
        的setTimeout（函数（）{
          $ $范围适用于（）。
            updateCDT（）
        }，1000）;

小提琴为$ $范围。适用（）

使用$超时（不要忘记它注入到控制器）

 （功能updateCDT（）{
            $ scope.formData.currentDateTime =新的日期（）的toString（）。
            的document.getElementById（currentDateTime）。innerHTML的
    = $ scope.formData.currentDateTime;
            $超时（updateCDT，1000）;        }）（）;

小提琴为$超时

I am working with an AngularJS powered page, and I need to display a running clock inside a read-only input text field (two way bound with data-ng-model). To simulate a running clock, I am using a JavaScript scheduler with setTimeout to call a function every 1000 milliseconds, which updates the $scope'd property value which in turn is bound to that input text field. Somehow the value in the input field is not getting updated. So I placed a <pre /> tag and updated its content using a jQuery selector. That is working fine, so I need help getting the input text field value to also get updated every second.

I have set up a jsFiddle for this example.

The HTML is below:

<body data-ng-app="formApp">
    <div data-ng-controller="FormCtrl">
        Current Date and Time <input type="text" data-ng-model="formData.currentDateTime" readonly="readonly" size="60" />
    </div>
    <pre id="currentDateTime" style="font-size:1.5em;">
    </pre>
</body>

The AngularJS app module and controller are declared as follows:

(function() {
    var formApp = angular.module("formApp", []);

    formApp.controller("FormCtrl", function ($scope) {
        $scope.formData = {};
        $scope.formData.currentDateTime = new Date().toString();

        (function updateCDT() {
            $scope.formData.currentDateTime = new Date().toString();
            document.getElementById("currentDateTime").innerHTML = $scope.formData.currentDateTime;
            setTimeout(updateCDT, 1000);
        })();
    });
})();

you need to use $scope.$apply() or angulars $timeout to reflect changes since setTimeout is outside the scope of angularjs

using $scope.$apply()

apply $scope.$apply() inside anonymous function of setTimeout(function(){},1000) and then call the actual function like below

   (function updateCDT() {
        $scope.formData.currentDateTime = new Date().toString();
        document.getElementById("currentDateTime").innerHTML
  = $scope.formData.currentDateTime;
        setTimeout(function(){
          $scope.$apply();
            updateCDT()
        }, 1000);

fiddle for $scope.$apply()

using $timeout (dont forget to inject it into controller)

 (function updateCDT() {
            $scope.formData.currentDateTime = new Date().toString();
            document.getElementById("currentDateTime").innerHTML
    = $scope.formData.currentDateTime;
            $timeout(updateCDT, 1000);

        })();

fiddle for $timeout

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AngularJS输入字段不是从里面的setTimeout更新控制器

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