Question

I have a string

https://gdata.youtube.com/feeds/api/videos?q=4s-PbMuNooo

I want to get string 4s-PbMuNooo. How do I parse a NSString?

Answer 1

Short answer :

NSString *myString = @"https://gdata.youtube.com/feeds/api/videos?q=4s-PbMuNooo";
NSArray *components = [myString componentsSeparatedByString:@"="];
NSString *query = [components lastObject];

Problems :

1) What if the bit after the q= contains another =

2) What if the q= bit is missing?

A better answer is for you to read the documentation – there are lots of helper methods on NSString that will get you substrings. Look for rangeOfString to find out where the equals would be and subStringWithRange to get the bit you want.

EDIT: Thomas has raised a fair point about URL parsing – see his answer here