From the course: Swift 5: Protocol-Oriented Programming
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Completing the OpenWeatherMap controller
From the course: Swift 5: Protocol-Oriented Programming
Completing the OpenWeatherMap controller
- Let's continue the implementation of the OpenWeatherMap controller. For networking, we'll use a URL dataTask. Let dataTask, and I'm going to use the URL sessions initializer that takes a URL and the completionHandler. For URL, I provide endpointURL, and we're going to implement the completionHandler. We have a data parameter, a response, and an error. If there is an error, we're going to wrap it in our dedicated error type and pass it back to the caller. So, let's check whether there was an error. It should be nil, or else we call our completionHandler. I'm using guard to check if it's nil, and if it's not nil, we invoke the completionHandler. I provide nil for the weather information and webServiceControllerError forwarded, and I include the error. And exit the method call. The return response shouldn't be nil either, otherwise, I invoke the completionHandler and provide the invalidPayload error. Guard let responseData…
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Contents
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Weather app design2m 32s
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Defining the UI using SwiftUI4m 20s
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The WebServiceController protocol5m 13s
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Working with a third-party API52s
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Implementing the OpenWeatherMap controller4m 9s
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Completing the OpenWeatherMap controller2m 42s
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Introducing the view model3m 8s
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Presenting weather data2m 39s
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Challenge: Integrating a fallback service2m 34s
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Solution: Integrating a fallback service4m 8s
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