iOS中sqlite数据库的原生用法

//数据库存放路径
let sqlitepath = NSHomeDirectory().stringByAppendingPathComponent("Documents/sqlite3.db")
//打开数据库，指定数据库文件路径，如果文件不存在后先创建文件，再打开，所以无需手动创建文件
let state = sqlite3_open(sqlitepath, &db)
if state == SQLITE_OK{
 println("打开数据库成功")
}else{
 println("打开数据库失败")
}

var db:COpaquePointer = nil
override func viewDidLoad() {
 super.viewDidLoad()
 ...
}

//创建表
let createtable = "create table if not exists students (id integer primary key autoincrement,name
text,stuId integer)"
let result = sqlite3_exec(db, createtable, nil, nil, nil)
if result == SQLITE_OK{
 println("创建表成功")
}
//删除表
let removetable = "drop table studets"
let result2 = sqlite3_exec(db, removetable, nil, nil, nil)
if result2 == SQLITE_OK{
 println("删除表成功")
}

//插入数据
let inserttable = "insert into studets (stuId,name) values(?,?)"
var statement:COpaquePointer = nil
let result3 = sqlite3_prepare_v2(db, inserttable, -1, &statement, nil)
if result3 == SQLITE_OK{
 //绑定数据
 sqlite3_bind_int(statement, 1, 1)
 sqlite3_bind_text(statement, 2, "lijialong", -1, nil)
 
 //执行
 if sqlite3_step(statement) == SQLITE_DONE{
  println("数据插入成功")
 }
 sqlite3_finalize(statement)
 }

let updatetable = "update studets set name ='ss' where id = 1"
var statement:COpaquePointer = nil
sqlite3_prepare_v2(db, updatetable, -1, &statement, nil)
sqlite3_step(statement)
sqlite3_finalize(statement)

let deleterow = "delete from studets where name='lijialong'"
sqlite3_prepare_v2(db, deleterow, -1, &statement, nil)
sqlite3_step(statement)
sqlite3_finalize(statement)

//查询数据
let query = "select * from studets"
//这条执行后，数据就已经在sattement中了
sqlite3_prepare_v2(db, query, -1, &statement, nil)
//游标往下走一步，如果返回SQLITE_ROW就进入
while sqlite3_step(statement) == SQLITE_ROW{
 let id = sqlite3_column_int(statement, 0)
 let stuId = sqlite3_column_int(statement, 2)
}