内存泄漏,我的问题可能是指针[swift]

这可能是我内存泄漏的原因吗?

当然可以。

我需要去硝化这个指针吗?

正如bscothern所评论的,如果 Pointee 是非平凡类型。但万一 UInt8 ,这不是强制性的。

但是你 需要释放指针吗 最后

你的代码应该是这样的:

func sendMessage(message: String) {

    let data = message.data(using: String.Encoding.utf8, allowLossyConversion: false)!
    let dataMutablePointer = UnsafeMutablePointer<UInt8>.allocate(capacity: data.count)
    defer {
        dataMutablePointer.deallocate()
    }

    //Copies the bytes to the Mutable Pointer
    dataMutablePointer.initialize(to: 0)
    defer {
        //This is not required, but you can put `deinitialize` here if you prefer
        dataMutablePointer.deinitialize(count: data.count)
    }
    data.copyBytes(to: dataMutablePointer, count: data.count)

    //Cast to regular UnsafePointer
    let dataPointer = UnsafePointer<UInt8>(dataMutablePointer)

    //Your stream
    outputStream.write(dataPointer, maxLength: data.count)
}

defer 将其块的执行延迟到封闭块的末尾,因此 dataMutablePointer.deallocate() 之后将被处决 outputStream.write(dataPointer, maxLength: data.count) 完成了。

但我会在不复制数据的情况下写一些等效的东西:

func sendMessage(message: String) {

    let data = message.data(using: String.Encoding.utf8, allowLossyConversion: false)!

    data.withUnsafeBytes {bytes in
        let dataPointer = bytes.baseAddress!.assumingMemoryBound(to: UInt8.self)
        //Your stream
        outputStream.write(dataPointer, maxLength: data.count)
    }
}

或者,更简单地说:

func sendMessage(message: String) {
    //Your stream
    outputStream.write(message, maxLength: message.utf8.count)
}