iOS - 如何在AFHTTPClient完成所有操作时收到通知

Question

I use AFHTTPClient to upload files to an API as a AFMultipartFormData . AFHTTPRequestOperation -s are created in a loop so I don't know how many they are or which one will be the last operation.

How can I get notified when AFHTTPClient is done with all operations? there is operationQueue property which can count operations for me, but I don't want to add an observer for that..

Answer 1

您可以使用GCD在后台放置一个代码块，在队列中调用waitUntilAllOperationsAreFinished ，然后发出通知。

Answer 2

If @patric-schenke's answer doesn't work (for example, if you want to count only upload operations and not all operations, you can create a counter. Create an NSInteger , and increment it when you add an operation. Make sure to decrement it in both the success and failure blocks.

Why don't you want to add an observer to the operationQueue , though? I think that'd get what you want with the least amount of code.