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我想添加一个 $watch 来观察 $scope.data 是否更改，但它不能工作

[ http://jsbin.com/biqesojaqu/1/edit?html,js,控制台,输出][1]

应用程序.html

<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.26/angular.min.js"></script>
  <meta charset="utf-8">
  <title>JS Bin</title>
</head>
<body ng-app="App" ng-controller="TestController">
<div>
  <ul>
    <li ng-repeat="item in data"> {{ item.name }}--{{ item.status }}</li>
    <button ng-click="addOnePerson()">ADD</button>
  </ul>
</div>
</body>
</html>

应用程序.js

var App = angular.module("App", []);

App.controller('TestController', function ($scope) {
  $scope.data = [
    {name: 'cc', status: true},
    {name: 'bob', status: false}
  ];
  $scope.name = 'nataila';
  $scope.addOnePerson = function () {
    var personCount = $scope.data.length;
    personCount += 1;
    $scope.data.unshift({name: 'cc'+personCount, status: true});
  };
  $scope.$watch('data', function (){
    console.log('has changed');
  });
});

当我单击按钮时，我认为控制台会输出has chenged，但没什么，请告诉我为什么，在 JSbin 中帮助我很好

4

1 回答 1

2

用于或$watchCollection_arrayobject

$scope.$watchCollection('data', function (){
  console.log('has changed');
});

JSBin

于 2015-05-27T07:48:29.010 回答