ios - Alamofire 如何将request添加到一个队列里面，顺序执行？？

Question

如题，Alamofire 如何将request添加到一个队列里面，顺序执行？？

Answer 1

Use NSOperationQueue

Answer 2

Create a NSOperationQueue ，设置其 maxConcurrentOperationCount 为 1 so that they are executed sequentially.

queue.addOperationWithBlock {
    manager.request(.GET, ...)
}

Answer 3

Okay, let me post the code

If the network request itself is asynchronous, then joining the ready-made queue will definitely be asynchronous directly. Directly executing the next one cannot be directly queued for execution.

So you have two methods to handle it. One is to block with a signal, and the other is to call back the next operation after completion. In short, it is similar to

 NSOperation *operation = [NSBlockOperation blockOperationWithBlock:^{ 
    //your request
}];

Then put all the operations into an operations array

Then

 NSOperation *operation = [NSBlockOperation blockOperationWithBlock:^{ 
    //your request
    // success in your request--> callback next operation
    // fail in your request-->do something
}];

Signal blocking can also be used, but the efficiency will be compromised. It should be easy to understand when written like this, right?