Parse NSURL path and query on iOS

Question

Are there any standard objects or functions to parse an NSURL\'s components? Clearly I could write one, but why re-invent the wheel?

[NSURL path] will

Answer 1

Heres what i use to parse the query string

// Parse the individual parameters
// parameters = @"hello=world&foo=bar";
NSMutableDictionary *dictParameters = [[NSMutableDictionary alloc] init];
NSArray *arrParameters = [parameters componentsSeparatedByString:@"&"];
for (int i = 0; i < [arrParameters count]; i++) {
    NSArray *arrKeyValue = [[arrParameters objectAtIndex:i] componentsSeparatedByString:@"="];
    if ([arrKeyValue count] >= 2) {
        NSMutableString *strKey = [NSMutableString stringWithCapacity:0];
        [strKey setString:[[[arrKeyValue objectAtIndex:0] lowercaseString] stringByReplacingPercentEscapesUsingEncoding: NSUTF8StringEncoding]];
        NSMutableString *strValue   = [NSMutableString stringWithCapacity:0];
        [strValue setString:[[[arrKeyValue objectAtIndex:1]  stringByReplacingOccurrencesOfString:@"+" withString:@" "] stringByReplacingPercentEscapesUsingEncoding: NSUTF8StringEncoding]];
        if (strKey.length > 0) [dictParameters setObject:strValue forKey:strKey];
    }
}
NSLog(@"Parameters: %@", dictParameters);