所有：

当我在函数中更改$ scope变量时，我想知道何时可以触发数据摘要和更新视图？

说我有一个像这样的功能：

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

app.controller("main", function($scope) {
  $scope.data1 = "old data 1";
  $scope.data2 = "old data 2";

  function changedata() {
    this.data1 = "new data 1";
    for (var i = 0; i < 1000; i++) {
      for (var j = 0; j < 1000; j++) {
        for (var k = 0; k < 2000; k++) {
          var data = i * j * k;
        }
      }
    }
    this.data2 = "new data 2";
  }
  $scope.changedata = changedata.bind($scope);
  
})

<html ng-app="app">
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<body ng-controller="main">
  <button ng-click="changedata()">Change data(click and wait a little bit time)</button>
  <div>{{data1}}</div>
  <div>{{data2}}</div>
  <div>I change data 1 first, then set a blocking delay and change data2 in the click handler, I wonder how can I make angular update the view immediately after data 1 changed rather than waiting for the function call finished? In another way, at what point does angular digest cycle get triggered?
</body>
</html>

当我单击按钮时，视图中的data1永远不会更新，直到函数返回，我想知道Angular是否根据函数调用摘要数据和更新视图？如果没有，任何人都可以提供一些细节 how angular check data dirty and run update?

谢谢

angularjs