等到方法完成后再下一个方法？

Question

I have a class that uploads images:

$myClass->upload();
nextMethod();

In this upload method a (AWS S3) promise is executed:

$promise->then(function() { echo "Done\n"; }, function() { echo "Not Done\n"; });

How can I make it so that nextMethod is not called until the promise is completed?

Answer 1

Because the promise is asynchronous by default (ie only registering the callback to be called when the upload actually completes), the only way to do that is to execute all the logic from the promise success callback. (ie the nextMethod() ) If you require the use of variables from the parent scope, pass them to the use language construct.

$promise->then(function() { echo "Done\n"; nextMethod(); }, function() { echo "Not Done\n"; });