从外部调用AngularJs方法，而不需要$digest

Question

当从外部AngularJs调用方法时，我需要调用$digest/$apply，但我不想照顾它。有什么好办法吗?

<button ng-click='sayHello()'>greet</button>
{{greeting}}
//This works fine!
$scope.sayHello = function () {
    $scope.greeting = 'Hello!';
};
//This needs a $digest!
$scope.sayHello = function () {
    //setTimeout simulates invokation from outside AngularJs.
    setTimeout(function () {
        $scope.greeting = 'Hello!';
        //I don't want to think about $digest(); 
        //So, how to do this without the $digest?
        $scope.$digest(); //or $scope.$apply();
    }, 1000);
};

Answer 1

对于setTimeout的特定情况，您可能希望使用内置的$timeout。在其他情况下(例如……你可以把你的代码包装在一个apply块中，这样就可以把它提升到AngularJS的摘要循环中，像这样:

setTimeout(function () {
  $scope.$apply(function(){
    //Your Code goes here
  }
}, 1000);