複製詮釋到UnsafeMutablePointer

Question

我有一個Int我想要複製到類型的指針UnsafeMutablePointer<Int32>?

我試圖將其轉換爲數據，然後將其複製，但複製功能參數是類型的UnsafeMutablePointer<UInt8>

這是我已經試過：

var sizePointer: UnsafeMutablePointer<Int32>? 
var numOfBytes = 100 
var sizeData = Data(bytes: &(numOfBytes), count: MemoryLayout<Int>.size) 
//What's now? How to copy it to the pointer? 
//sizeData.copyBytes(to: size, count: MemoryLayout<Int>.size) not working 

編輯：

我有以下的功能，即獲得一個指針。我需要將int複製到該地址。

func f(pointer: UnsafeMutablePointer<Int32>?) { 
    var numOfBytes = 100 
    //copy numOfBytes to the pointer's address 
} 

Answer 1

如果你只是想打電話給其預計UnsafeMutablePointer<Int32>類型的參數的函數，那麼它就是這麼簡單：

func f(_ i: UnsafeMutablePointer<Int32>) { 
    print(i.pointee) 
} 

var x = Int32() 
f(&x)