UnsafePointer no longer works in swift 3

You can try this:

let rawPointer = UnsafeRawPointer(array1)
let pointer = rawPointer.assumingMemoryBound(to: UInt32.self)
let value = pointer.pointee

Raw pointer is a pointer for accessing untype data.

assumingMemoryBound(to:) can convert from an UnsafeRawPointer to UnsafePointer<T>.

Reference :Swift 3.0 Unsafe World