How do you cast a UInt64 to an Int64?

Question

Trying to call dispatch_time in Swift is doing my head in, here\'s why:

 dispatch_after(dispatch_time(DISPATCH_TIME_NOW, 10 * NSEC_PER_SEC), dispatch_get_mai         


        

Answer 1

simple solution for Swift 3 is an inbuilt function that takes care of overflows and buffer management.

var a:UInt64 = 1234567890
var b:Int64 = numericCast(a)