How to extract scheme and host of a URL once?

问题

Imagine this is my URL

NSURL *theURL=[NSURL URLWithString:@"http://stackoverflow.com/questions/ask"];

How can i extract only:

http://stackoverflow.com

?

回答1:

How about [NSString stringWithFormat:@"%@://%@", [theURL scheme], [theUrl host]]

回答2:

Have you tried [theURL host]?

来源：https://stackoverflow.com/questions/8890475/how-to-extract-scheme-and-host-of-a-url-once