问题
I wanted to know the best between Spawning a Thread or making a async call using NSURLConnection class.
回答1:
See the documentation.
An NSURLConnection object provides support to perform the loading of a URL request. The interface for NSURLConnection is sparse, providing only the controls to start and cancel asynchronous loads of a URL request.
i.e. NSURLConnection only supports asynchronous loading of content. Even the sendSynchronousRequest:returningResponse:error: method is really just a wrapper around async loading that blocks until done.
That class reference has links to both the programming guide and numerous examples.
来源：https://stackoverflow.com/questions/5445605/thread-vs-async-call