如何角HttpPromises工作？ [英] How do Angular HttpPromises work?

问题描述

我想用角的 $ HTTP ，但我不知道该怎么用它做返回。

I want to use Angular's $http but I'm not sure what to do with what it returns.

这是困扰我的主要事情是，它返回一个 HttpPromise 。我该怎么跟那怎么办？它是如何工作的？

The main thing that is troubling me is that it returns an HttpPromise. What do I do with that? How does it work?

推荐答案

这真的很简单。角的 $ HTTP 返回一个承诺，这就像任何其他类型的承诺，并且我建议你上的角的 $ q

It's really simple. Angular's $http returns a Promise, which is like any other kind of Promise and I recommend you read up on Angular's $q

在下面的jsfiddle中， HttpPromise 是它的执行后，用了几秒钟。换句话说， $ http.get（...）发出，但我们只做些事情的结果后，在我们的闲暇。

In the following JSFiddle, the HttpPromise is used a few seconds after it's executed. In other words, $http.get(...) is issued, but we only do something with the result later, at our leisure.

function Ctrl($scope, $http, $timeout) {
    $scope.text = "text";
    $scope.clicky = function(){
        var httpPromise = $http.get('/echo/json/');

        $timeout(function(){
            httpPromise.success(function(data){
                $scope.text = "Http Post Worked Succesfully";
                console.log(data);
            });
        }, 3000);
    }
}

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