Search for phrase in web [duplicate]

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• How to encode a URL in Swift 13 answers

I'd like to use google to search for a specific string like "Ouhh, let's call this hello world! (^_^)".

I found out that I can use this URL https://www.google.com/search?&q=search+for+this+string to search for "search for this string".

How can I validate any string (that includes special characters like '/', '\', '=', ...) to get a matching search URL?

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string mySearchQuery = "Ouhh, let's call this hello world! (^_^)";
UIApplication.shared.open(URL(string: "https://www.google.com/search?&q=" + mySearchQuery)!, options: [:], completionHandler: nil); // not working because of the special characters.