[iOS Dev] Parse query string into dictionary

	- (NSDictionary *)parseQueryString:(NSString *)query {
	NSMutableDictionary *dict = [[NSMutableDictionary alloc] initWithCapacity:6];
	NSArray *pairs = [query componentsSeparatedByString:@"&"];
	for (NSString *pair in pairs) {
	NSArray *elements = [pair componentsSeparatedByString:@"="];
	NSString *key = [[elements objectAtIndex:0] stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
	NSString *val = [[elements objectAtIndex:1] stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
	[dict setObject:val forKey:key];
	}
	return dict;
	}

view raw parseQueryString.m hosted with ❤ by GitHub

Usage:

NSString *qs = @"username=hank&age=27&blog=whhnote.blogspot.com";
NSDictionary *queryParams = [self parseQueryString:qs];
NSLog(@"%@", queryParams);
NSLog(@"%@", [queryParams objectForKey:@"username"]); // get username from dict

So, you will get a dictionary look like

{
    age = 27;
    blog = "whhnote.blogspot.com";
    username = hank;
}