[英]How do I update a statement of Data of UnsafePointer for Swift 3?
我收到此語句的以下錯誤:
let data = Data(bytes: UnsafePointer<UInt8>(cubeData), count: cubeData.count * MemoryLayout<Float>.size)
cubeData定義為: var cubeData = [Float](repeating: 0, count: size * size * size * 4)
錯誤:
'init' is unavailable: use 'withMemoryRebound(to:capacity:_)' to temporarily view memory as another layout-compatible type.
我怎樣才能解決這個問題?
謝謝!
您可以使用Array.withUnsafeBufferPointer
獲得緩沖區指針(即,指向具有其長度的數組的指針)。 然后使用Data.init(buffer:)
從緩沖區指針初始化數據。
let cubeData: [Float] = [1.1, 2.2, 3.3, 4.4]
let b = cubeData.withUnsafeBufferPointer { Data(buffer: $0) }
print(b as NSData)
// <cdcc8c3f cdcc0c40 33335340 cdcc8c40>
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