Swift 3.0将数据转换为数组<uint8>

Question

如何将数据转换为UInt8数组？

func serialPort(_ serialPort: ORSSerialPort, didReceive data: Data) {
print("recieved:\(data)")
let arr: [UInt8] = Data(???)???
}

日志 收到：70字节

Answer 1

在Swift 3中，Data作为Collection的{​​{1}}，因此您只需使用UInt8。

Array.init

但是，var received: [UInt8] = [] func serialPort(_ serialPort: ORSSerialPort, didReceive data: Data) { print("received:\(data))") received = Array(data) } （或Array.init）会复制Array.append(contentsOf:)的内容，因此当您需要处理大量Data时效率不高。

Answer 2

知道了！

var recived = [UInt8]()

func serialPort(_ serialPort: ORSSerialPort, didReceive data: Data) {
        recived.removeAll()
        print("recieved:\(data))")
        recived.append(contentsOf: data)
}

Answer 3

使用withUnsafeBytes：

let data = "ABCD".data(using: .ascii)!
data.withUnsafeBytes {  (pointer: UnsafePointer<UInt8>) in
    //Prints 67 which is the ASCII value of 'C'
    print(pointer[2])
}