Let's say you've installed RxSwift via CocoaPods or whatever. And you can compile with import RxSwift
at the top of your swift file.
Let's create a simple Observable
with Observable.from
simply listing a bunch of integers.
We'll subscribe it, looking at the next and error states. When we hit onNext
we just print:
let _ = Observable.from([404, 808]).subscribe(
onNext: {s in
print(s)
},
onError: {e in
if e is GatesOfHellOpen {
print("It's a Saturday!")
}
})
}
The onError
function is odd. First it's referencing an error. There's probably an easier and better way to do this with enums
but I know little about that yet. They're defined class TheRapture : Error {}
and class GatesOfHellOpen : Error {}
.
If you want to send one down, change the first line for let _ = Observable.error(GatesOfHellOpen()).subscribe(
for example.