迁移到Swift 5后，SQLite.swift出现问题

本文介绍了迁移到Swift 5后，SQLite.swift出现问题的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我使用SQLite.swift，升级到Swift 5后，库中出现错误.请帮助我重写该方法.

I use SQLite.swift and after upgrading to Swift 5 an error appears in the library. Please help me rewrite the method.

错误:

'withUnsafeBytes' is deprecated: use `withUnsafeBytes<R>(_: (UnsafeRawBufferPointer) throws -> R) rethrows -> R` instead

代码:

public var datatypeValue: Blob {
    return withUnsafeBytes { (pointer: UnsafePointer<UInt8>) -> Blob in
        return Blob(bytes: pointer, length: count)
    }
}

推荐答案

直到SQLite.swift不会发布任何更新，并带有您可以尝试手动修改SQLite/Foundation.swift for fromDatatypeValue(_ dataValue: Blob)函数和计算所得的属性通过这种方式:

Till SQLite.swift doesn't release any update with the fix you could try modify manually the SQLite/Foundation.swift for fromDatatypeValue(_ dataValue: Blob) function and the computed property datatypeValue in this way:

public static func fromDatatypeValue(_ dataValue: Blob) -> Data {
    return Data(dataValue.bytes)
}

public var datatypeValue: Blob {
    return withUnsafeBytes { (pointer: UnsafeRawBufferPointer) -> Blob in
        return Blob(bytes: pointer.baseAddress!, length: count)
    }
}

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