swift3 - swift 3 如何使用CFArrayCreate

Question

我想从数组创建 CFArray

以前在 Swift 2 中，我可以这样做:

let array = [0, 1, 2, 3]
let arrayPointer = UnsafeMutablePointer<UnsafePointer<Void>>(array)
let cfArray = CFArrayCreate(kCFAllocatorDefault, arrayPointer, array.count, nil)

现在在 Swift 3 CFArrayCreate 中期待 UnsafeMutablePointer<UnsafeRawPointer?>!作为第二个参数

我尝试这样做的一种方法是这样的:

let array: [Int] = [0, 1, 2, 3]
var rawPointer: UnsafeRawPointer? = UnsafeRawPointer(array)
let cfArray = withUnsafeMutablePointer(to: &rawPointer) { ppArray in
    CFArrayCreate(kCFAllocatorDefault, ppArray, array.count, nil)
}

但是，这将创建 CFArray，其元素为 [rawPointer、垃圾、垃圾、垃圾的值]，而不是 [0, 1, 2, 3]

我该怎么做这个UnsafeMutablePointer<UnsafeRawPointer?>!参数超出数组？

Answer 1

你可以做到

let cfArray = array as CFArray