update swift files to swift 3

[evgenybruhachev]

[wods]

HI,
Is there any update for this issue?

Thanks,

[dmauro]

It might be a bit. We don't have plans to move over to Swift 3 internally just yet, so I'm not handy with it yet. I'll take a stab at it, but would also love a hand with it (I'll mark it as such).

[wods]

Thanks.

[ChokWah]

It 's 2017now. Is there any update for this issue?

[tvstuff]

Any update on this yet?

[dmauro]

I started working on this in some of my free time since it's not a priority for us. Still would love to get some help though if anyone is interested.

[abanobmikaeel]

Currently working on the swift 3 migration running into issues with
'dispatch_once_t' is unavailable in Swift: Use lazily initialized globals instead
Any suggestions? @dmauro

[dmauro]

Oh, awesome, glad to see someone is helping out with this, thank you! Yeah so for dispatch_once_t you should just use the a static var instead probably. Which line is this you're dealing with specifically?

[abanobmikaeel]

Glad to help. DiskCache line 33 mainly.

[dmauro]

Ahhh, I think we should actually abandon that altogether and use something like this instead where we would otherwise reference that variable:

if #available(iOS 8.0, *) {
    // equivalent to isAtLeastiOS8
} else {
    // use the old crappier APIs
}

For other cases though where you can't just drop the dispatch once, static var is probably the way to go.