round trip Swift number types to/from Data

Question

With Swift 3 leaning towards Data instead of [UInt8], I\'m trying to ferret out what the most efficient/idiomatic way to encode/decode swifts vario

Answer 1

In my case, Martin R's answer helped but the result was inverted. So I did a small change in his code:

extension UInt16 : DataConvertible {

    init?(data: Data) {
        guard data.count == MemoryLayout.size else { 
          return nil 
        }
    self = data.withUnsafeBytes { $0.pointee }
    }

    var data: Data {
         var value = CFSwapInt16HostToBig(self)//Acho que o padrao do IOS 'e LittleEndian, pois os bytes estavao ao contrario
         return Data(buffer: UnsafeBufferPointer(start: &value, count: 1))
    }
}

The problem is related with LittleEndian and BigEndian.