创建数据库语句
-(void)creatData
{
sqlite3 *sqlite = nil;
NSString *filePath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/data.file" ];
//打开数据库
int result = sqlite3_open([filePath UTF8String], &sqlite);
if (result !=SQLITE_OK) {
NSLog(@"创建失败！！！");
return ;
}
//创建表的SQL语句
NSString *sql = @"CREATE TABLE IF NOT EXISTS UserTable(userName text PRIMARY KEY ,password text,email text)";
//执行SQL语句
char *error;
result = sqlite3_exec(sqlite, [sql UTF8String], NULL, NULL, &error);
if (result != SQLITE_OK) {
NSLog(@"创建数据库失败：%s",error);
return ;
}
//插如入一条数据
//INSERT OR REPLACE INTO UserTable (userName,password,email) VALUES(?,?,?);
//更新一条数据
//UPDATE UserTable set password = '' where userName = '';
//查询数据
//SELECT userName ,password,eamil FROM UserTable where username = '';
//删除数据
// DELETE FROM UserTable WHERE username ='';
//关闭数据库
sqlite3_close(sqlite);
}
**************************
-(void)editData
{
sqlite3 *sqlite = nil;
//句柄语句
sqlite3_stmt *stmt =nil;
//数据库
NSString *filePath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/data.file"];
int result = sqlite3_open([filePath UTF8String], &sqlite);
if (result !=SQLITE_OK) {
NSLog(@"打开数据库失败！！！");
return ;
}
//创建SQL 语句
NSString *sql = @" INSERT INTO UserTable (userName,password,email) VALUES (? ,?, ?)";
//编译SQL语句
sqlite3_prepare_v2(sqlite, [sql UTF8String], -1, &stmt, NULL);
NSString *userName = @"张三";
NSString *password = @"123456";
NSString *email = @"mxyd.qq";
//绑定填充SQL语句
sqlite3_bind_text(stmt, 1, [userName UTF8String], -1, NULL);
sqlite3_bind_text(stmt, 2, [password UTF8String], -1, NULL);
sqlite3_bind_text(stmt, 3, [email UTF8String], -1, NULL);
SQL编辑语句
//执行SQL语句
result = sqlite3_step(stmt);
if (result == SQLITE_ERROR || result == SQLITE_MISUSE) {
NSLog(@"编译数据库出错！！！");
return;
}
//关闭句柄语句
sqlite3_finalize(stmt);
//关闭数据库
sqlite3_close(sqlite);
NSLog(@"数据插入成功！！！");
}