swift2 - Xcode 7.0 中带有 swift 2.0 的 SQLite.swift

Question

我最近更新到 Xcode 7.0 并尝试构建使用 SQLite.swift 库的项目。在转换为最新的 Swift 语法（Edit->Convert->To Latest Swift Syntax...）后，我遇到了很多错误，我不知道从哪里开始修复它们。我还尝试单独转换 SQLite.swift 项目，但在编译时总是会收到很多警告和一些错误，例如：

/Users/dobrev/Development/iOS/SQLite.swift/SQLite/Statement.swift:25:30: error: cannot invoke initializer for type 'sqlite3_destructor_type' with an argument list of type '(COpaquePointer)'
internal let SQLITE_STATIC = sqlite3_destructor_type(COpaquePointer(bitPattern: 0))
                             ^
/Users/dobrev/Development/iOS/SQLite.swift/SQLite/Statement.swift:26:33: error: cannot invoke initializer for type 'sqlite3_destructor_type' with an argument list of type '(COpaquePointer)'
internal let SQLITE_TRANSIENT = sqlite3_destructor_type(COpaquePointer(bitPattern: -1))

最终导致Command failed due to signal: Segmentation fault 11

有人可以帮忙吗？

Answer 1

#define SQLITE_STATIC      ((sqlite3_destructor_type)0)
#define SQLITE_TRANSIENT   ((sqlite3_destructor_type)-1)

from<sqlite3.h>没有被导入到 Swift，可能是由于“不安全”的指针转换。

SQLite.swift 项目的 Statement.swift 中显示了一个可能的 Swift 定义：

let SQLITE_STATIC = sqlite3_destructor_type(COpaquePointer(bitPattern: 0))
let SQLITE_TRANSIENT = sqlite3_destructor_type(COpaquePointer(bitPattern: -1))

对于 Swift 2，您将需要

let SQLITE_STATIC = unsafeBitCast(0, sqlite3_destructor_type.self)
let SQLITE_TRANSIENT = unsafeBitCast(-1, sqlite3_destructor_type.self)