import UIKit 
 
class sqliteManager: NSObject { 
  private static let manager: sqliteManager = sqliteManager() 
  //單例 
  class func shareManager() -> sqliteManager{ 
    return manager 
  } 
  //數(shù)據(jù)庫對象 
  private var db:OpaquePointer? = nil 
  func openDB(sqliteName:String){ 
    //0.拿到數(shù)據(jù)庫的路徑 
    let path = sqliteName.docDir() 
    print(path) 
    let cPath = path.cString(using: String.Encoding.utf8) 
    //1.需要代開的數(shù)據(jù)庫的路徑 c語言的字符串 
    //2.打開之后的數(shù)據(jù)庫對象（指針）,以后所有的數(shù)據(jù)庫操作，都必須拿到這個指針才能進(jìn)行相關(guān)操作 
    if sqlite3_open(cPath, &db) != SQLITE_OK{ 
      print("數(shù)據(jù)庫打開失敗") 
      return  
    } 
    if creatTable(){ 
      print("創(chuàng)建表成功") 
    }else{ 
      print("創(chuàng)建表失敗") 
    } 
  } 
  private func creatTable() -> Bool 
  { 
    // 1.編寫SQL語句 
    // 建議: 在開發(fā)中編寫SQL語句, 如果語句過長, 不要寫在一行 
    // 開發(fā)技巧: 在做數(shù)據(jù)庫開發(fā)時, 如果遇到錯誤, 可以先將SQL打印出來, 拷貝到PC工具中驗(yàn)證之后再進(jìn)行調(diào)試 
    let sql = "CREATE TABLE IF NOT EXISTS T_Person( \n" + 
      "id INTEGER PRIMARY KEY AUTOINCREMENT, \n" + 
      "name TEXT, \n" + 
      "age INTEGER \n" + 
    "); \n" 
    //    print(sql) 
    // 2.執(zhí)行SQL語句 
    return execSQL(sql: sql) 
  } 
  func execSQL(sql: String) -> Bool 
  { 
    // 0.將Swift字符串轉(zhuǎn)換為C語言字符串 
    let cSQL = sql.cString(using: String.Encoding.utf8)! 
     
    // 在SQLite3中, 除了查詢意外(創(chuàng)建/刪除/新增/更新)都使用同一個函數(shù) 
    /* 
     1. 已經(jīng)打開的數(shù)據(jù)庫對象 
     2. 需要執(zhí)行的SQL語句, C語言字符串 
     3. 執(zhí)行SQL語句之后的回調(diào), 一般傳nil 
     4. 是第三個參數(shù)的第一個參數(shù), 一般傳nil 
     5. 錯誤信息, 一般傳nil 
     */ 
    if sqlite3_exec(db, cSQL, nil, nil, nil) != SQLITE_OK 
    { 
      return false 
    } 
    return true 
  } 
 
 
} 

mport UIKit 
 
@UIApplicationMain 
class AppDelegate: UIResponder, UIApplicationDelegate { 
 
  var window: UIWindow? 
 
 
  func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool { 
    // Override point for customization after application launch. 
    sqliteManager.shareManager().openDB(sqliteName: "tergun.sqlite") 
    return true 
  } 
} 

// 
// String+Category.swift 
// DSWeibo 
// 
// Created by xiaomage on 15/9/10. 
// Copyright © 2015年 小碼哥. All rights reserved. 
// 
 
import UIKit 
 
extension String{ 
  /** 
  將當(dāng)前字符串拼接到cache目錄后面 
  */ 
  func cacheDir() -> String{ 
    let path = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.cachesDirectory, FileManager.SearchPathDomainMask.userDomainMask, true).last! as NSString 
    return path.appendingPathComponent((self as NSString).lastPathComponent) 
  } 
  /** 
  將當(dāng)前字符串拼接到doc目錄后面 
  */ 
  func docDir() -> String 
  { 
    let path = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.documentDirectory, FileManager.SearchPathDomainMask.userDomainMask, true).last! as NSString 
    return path.appendingPathComponent((self as NSString).lastPathComponent) 
  } 
  /** 
  將當(dāng)前字符串拼接到tmp目錄后面 
  */ 
  func tmpDir() -> String 
  { 
    let path = NSTemporaryDirectory() as NSString 
    return path.appendingPathComponent((self as NSString).lastPathComponent) 
  } 
}