ios - 如何在Swift中从ConstUnsafePointer创建CStirng

我知道CString可以用UnsafePointer初始化，但是如何用ConstUnsafePointer创建它

代码错误:ConstUnsafePointer无法转换为UnsafePointer

     var result:ConstUnsafePointer = sqlite3_column_text(stmt, num)
     let cstr:CString = CString(result)

或如何将其转换为UnsafePointer

最佳答案

您只需要浏览UnsafePointer:

var result: ConstUnsafePointer<UInt8> = sqlite3_column_text(stmt, num)
let cstr: CString = CString(UnsafePointer<UInt8>(result))