An illustration of OAuth Signature call for Yahoo Weather API written in Swift and Objective-C.
The example code given by yahoo is written in Java, PHP and Node.js. If you need to port it in Swift/Objective-C you can use this instead to save some time and have a beer :). For this example, I have used Miami Beach's location coordinates to fetch the current weather codnitions there.
Do remember to create your own credentials from Yahoo's "Create App" page as this is an open source project and anyone could be using these keys.