Create GCD queue in Swift? [duplicate]

Question

I get an crash when creating a GCD queue in Swift, any idea?

var q: dispatch_queue_t?
q = dispatch_queue_create("com.kukodajanos.queryPlaces", 0)

Answer 1

By looking at the documentational comments for it by alt + click you can see:

In the attr you can pass 3 things: nil, DISPATCH_QUEUE_SERIAL and DISPATCH_QUEUE_CONCURRENT not an Int.

Answer 2

Pass nil instead of 0:

    var q: dispatch_queue_t?
    q = dispatch_queue_create("com.kukodajanos.queryPlaces", nil)