Avoid consecutive “if let” declarations in Swift [duplicate]

Answer 1

In some cases you can use optional chaining. For your simple example:

if let b = optionalObj?.a?.b {
    // do stuff
}

To keep your nesting down and to give yourself the same variable assignments, you could also do this:

if optionalObj?.a?.b != nil {
    let obj = optionalObj!
    let a = obj.a!
    let b = a.b!
}