ios - UnsafePointer 不再适用于 swift 3

Question

在我从 swift 2 转换为 swift 3 后，下面提到的行弹出错误

let value = UnsafePointer<UInt32>(array1).pointee

'init' is unavailable: use 'withMemoryRebound(to:capacity:_)' to temporarily view memory as another layout-compatible type.

在swift2中就像

let value = UnsafePointer<UInt32>(array1).memory

有人可以解释一下吗？ 对不起，我对 swift3 很陌生

修改后

let abc = UnsafePointer<UInt32>(array1).withMemoryRebound(to: <#T##T.Type#>, capacity: <#T##Int#>, <#T##body: (UnsafeMutablePointer<T>) throws -> Result##(UnsafeMutablePointer<T>) throws -> Result#>)

但仍然应该向变量中输入什么值？抱歉，我四处搜索，但太糟糕了，我找不到解决方案

Answer 1

你可以试试这个:

let rawPointer = UnsafeRawPointer(array1)
let pointer = rawPointer.assumingMemoryBound(to: UInt32.self)
let value = pointer.pointee

原始指针是用于访问非类型数据的指针。

assumingMemoryBound(to:)可以从 UnsafeRawPointer 转换至 UnsafePointer<T> .

引用:Swift 3.0 Unsafe World