Question

我查看了这篇文章：Can you resolve an angularjs promise before you return it?

我试图将它应用到我的代码中，似乎无法正常工作。

这是我的代码：

 var myPromise = $timeout(function () { ... }, 1000);

    myPromise.then(function () { ... }); // the code in here runs

    $timeout.flush(); // this causes the promise to become resolved and the code in the 1st then above to run.

    // I expect this code to run immediately, since the promise is already resolved - but it doesn't
    myPromise.then(function () { ... });

注意：此代码在karma测试函数中运行，因此$ timeout应该正常工作...除非它已经解决了promises的问题？

Answer 1

问题是$ timeout.flush（）方法，它只在测试中可用（参见文档）：https://docs.angularjs.org/api/ng/service/ $ timeout 和https://docs.angularjs.org/api/ngMock/service/ $ timeout

如果你删除它 - 一切都按预期工作。

Answer 2

正如@Rytmis所说，调用$ scope.digest有效。这是现在的代码：

var myPromise = $timeout(function () { ... }, 1000);

    myPromise.then(function () { ... }); // the code in here runs

    $timeout.flush(); // this causes the promise to become resolved and the code in the 1st then above to run.

    // I expect this code to run immediately, since the promise is already resolved - but it doesn't
    myPromise.then(function () { ... }); 

    rootScope.$digest(); // This will trigger the 2nd promise.

正如这里提到的那样，这段代码是正常运行的，它不需要摘要调用。只有在此代码从测试运行时才需要摘要。

AngularJS - 您可以将then（）链接到以前解决的承诺吗？

2 个答案: