第三方FMDB的简单使用

1,导入第三方头文件

#import "FMDB.h"

//定义全局变量

@implementation InputInformationViewController

{

UITextField *_accountField;//帐号输入框

UITextField *_passwordsField;//密码输入框

FMDatabase *db;//数据库

}

//获取数据库

NSString *doc = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask , YES) lastObject];

NSLog(@"%@",doc);

NSString *fileName = [doc stringByAppendingPathComponent:@"information.sqlite"];

//获取数据库

db = [FMDatabase databaseWithPath:fileName];

if ([db open]) {

//创表

BOOL result = [db executeUpdate:@"CREATE TABLE IF NOT EXISTS M_Information (id integer PRIMARY KEY AUTOINCREMENT, account NOT NULL,passwords text NOT NULL);"];

if (result) {

NSLog(@"创表成功");

}else{

NSLog(@"创表失败");

}

}

//获取数据

NSString *account = _accountField.text;

NSString *passwords = _passwordsField.text;

if([db executeUpdate:@"INSERT INTO M_Information(account,passwords) VALUES(?,?);",account,passwords]){

NSLog(@"111");

};

//[db executeQueryWithFormat:@"INSERT INTO M_Information(account,passwords)VALUES(%@,%@);",account,passwords];

[self query];//执行查询语句

//查询语句函数

　　 ViewController *VC = [[ViewController alloc]init];

VC.dataArray = [[NSMutableArray alloc]init];

//执行查询语句

FMResultSet *resultSet = [db executeQuery:@"SELECT * FROM M_Information"];

//遍历结果集

while ([resultSet next]) {

//传递数据库中的数据

InformationModel *model = [[InformationModel alloc]init];

model.myAccount = [resultSet stringForColumn:@"account"];

model.myPasswords = [resultSet stringForColumn:@"passwords"];

[VC.dataArray addObject:model];

}