Have you ever seen nested Swift closures shaped like an arrowhead (aka Pyramid of Doom)? 😱

Code shaped as an arrowhead is an anti-pattern caused by many nested structures such as nested conditions, switch statements, and even closures - for example:

service.method1 { result1 in
    switch result1 {
    case .success:
        service.method2 { result2 in
            switch result2 {
            case .success:
                service.method3 { result3 in
                    ...
                }
            case .failure: 
                ...
            }
        }

    case failure:
        service.method4 {
            service.method5 {
                ...
            }
        }
    }
}

So watch this mentoring session now to learn how to eliminate nested closures (with & without Swift's async/await) to make code easier to read and maintain.

Get the source code at https://github.com/nativeiosdevelopment/multiple-nested-api-call

Also, subscribe to our Youtube channel