iOS swiftsqlite第三方类型不匹配问题

public var datatypeValue: Blob {
#if swift(>=5.0)
return withUnsafeBytes { (pointer: UnsafeRawBufferPointer) -> Blob in
return Blob(bytes: pointer.baseAddress!, length: count)
}
#else
return withUnsafeBytes { (pointer: UnsafePointer) -> Blob in
return Blob(bytes: pointer, length: count)
}
#endif
}