How to get Values from a NSString

Question

I have an NSString . It is a URL I am getting when using Universal Links. I want to get id value from it. Is there any direct methods in SDK or do we need to use componententsSeparated String values?

Below is the NSString/URL:

https://some.com/cc/test.html?id=3039#value=test

I want to get two things: "test" from test.html and "id" value.

Answer 1

Use NSURLComponents created from an NSURL or NSString of your URL.

From there you can use path to get the /cc/test.html part. Then use lastPathComponent to get test.html and finally use stringByDeletingPathExtension to get test .

To get the "id" value start with the components' queryItems value. Iterate that array finding the NSURLQueryItem with the name of "id" and then get its value.

Answer 2

You could create NSURLComponents from URL string get parameters by calling queryItems method. It will return array of NSURLQueryItem

NSURLComponents *components = [NSURLComponents componentsWithString:@"https://some.com/cc/test.html?id=3039&value=test"];
    NSArray *array = [components queryItems];
    for(NSURLQueryItem *item in array){
        NSLog(@"Name: %@, Value: %@", item.name, item.value);
    }
    NSLog(@"Items: %@", array);

Answer 3

We can make extension

  extension URL {              
      func getParamValue(paramaterName: String) -> String? {
          guard let url = URLComponents(string:self.absoluteString ) else { return nil }
             return url.queryItems?.first(where: { $0.name == paramaterName})?.value
      }
  }

Now you can call like below

let someURL = URL(string: "https://some.com/cc/test.html?id=3039&value=test")!
someURL.getParamValue("id") // 3039
someURL.getParamValue("value") // test