swift - 将 UnsafeMutablePointer 的实部提取为 Float 并将其存储在数组中

Question

我有这个功能

func arrayForPointer<T>(_ pointer: UnsafePointer<T>, count: Int) -> [T] {
let buffer = UnsafeBufferPointer<T>(start: pointer, count: count)
return Array(buffer)
}

和这个电话

let arrayComplex = self.arrayForPointer(&output, count: 4)

我想枚举 arrayComplex并将实部提取到常规数组中，例如

var arrayReal: [Float] = []

for item in arrayComplex {
  let myFloat = item.realp  \\ get the real part of item
  arrayReal.append(myFloat)
}

行

let myFloat = item.realp  \\ get the real part of item

不正确。

item是 UnsafeMutablePointer<Float>

天哪，我该怎么做？

谢谢。

=======================

这是 output

var A = [Float](repeating:0, count:samples/2);
var B = [Float](repeating:0, count:samples/2)
var output = DSPSplitComplex(realp: &A, imagp: &B)

Answer 1

试试这个。

修复你的函数调用:

let arrayComplex = arrayForPointer(output.realp, count: 4)

然后在你的循环中修复这一行:

let myFloat = item  \\ get the real part of item