How to parse a url to get key and value

Question

I am refering this answer to parse url but when parse this url

NSString *urlString = @"https://www.example.com/product-detail?journey_id=123456&iswa=1";

I am getting my 1st key is https://www.example.com/product-detail?journey_id But I need only journey_id as my key.

This is what I have done in coding:

NSString *urlString = @"https://www.example.com/product-detail?journey_id=123456&iswa=1";
        
NSMutableDictionary *waLoginDictionary = [[NSMutableDictionary alloc] init];
NSArray *urlComponents = [urlString componentsSeparatedByString:@"&"];
                            
for (NSString *keyValuePair in urlComponents) {
NSArray *pairComponents = [keyValuePair componentsSeparatedByString:@"="];
NSString *key = [[pairComponents firstObject] stringByRemovingPercentEncoding];
NSString *value = [[pairComponents lastObject] stringByRemovingPercentEncoding];
[waLoginDictionary setObject:value forKey:key];

}
                            
NSLog(@"%@", waLoginDictionary);

I am getting This output:

{
"https://www.example.com/product-detail?journey_id" = 123456;
iswa = 1;
} 

Answer 1

The answer you are referring to is outdated and has been updated accordingly by the writer himself. Apple added [URLQueryItem] in the URLComponent object.

Try this.

Swift

    let urlString = "https://www.example.com/product-detail?journey_id=123456&iswa=1"
    var dict: [String : String] = [:]
    if let urlComponents = URLComponents(string: urlString), let queryItems = urlComponents.queryItems {
        for item in queryItems {
            dict[item.name] = item.value
        }
    }
    print("dict : \(dict)")

Objective - C

NSString *urlString = @"https://www.example.com/product-detail?journey_id=123456&iswa=1";
NSMutableDictionary *dict = [NSMutableDictionary dictionary];

NSURLComponents *urlComponents = [NSURLComponents componentsWithString:urlString];
NSArray *queryItems = [urlComponents queryItems];

for (NSURLQueryItem *item in queryItems) {
    [dict setValue:item.value forKey:item.name];
}

NSLog(@"dict %@", dict);