How to handle errors in functions – Swift for Complete Beginners

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6. How to handle errors in functions: This video

Paul Hudson

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I heve never seen such a easy understanding, thank a ton.

ulugbeknematjonov

Now it would be interesting to see how to combine this error handling with NSExceptions. For example if a project has a legacy Objective-C codebase, upon which new features are implemented in Swift.

BadMemoryAccess

When I saw you use !, it made me think this had something to do with how I have to handle optionals like:

let offset = keyOf)!

This works, but I'm told this is "dangerous"

So, after watching this, thought I would trying to handle it this way:

do {try offset = keyOf) }
catch{
print("Evidently keyOf doesn't exist in currentKeyNotes")
}

hmmm, that gives an error, trying to figure out how to do handle this correctly

randygloden

How common is it to use Errors in cases like this, where user enters bad password? In my experience most people just use try/catch when they need to make network requests, . Things like short passwords would just be another case in the same switch block as the happy path. Maybe nobody takes full advantage of the try/catch pattern because we don't like to think about errors :)

jaredsalzano

Hi Paul

Is there a way that I can throw an error that has a custom string? So that I don’t need an enum setup, it just reads the error message from the API

Thanks

АдамБреннан

Hi Paul,

I got an error while using \(error.localizedDescription), in the latest version of Xcode.
please help...

NavDhillon

how would you make your own localised descriptions?

breadone_

have you covered the do and catch in previous videos?

fkwhiteblackracismwarsh

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