iphone数据库（sqlite3）的用法操作oc,xcode
首先你在用之前要在项目中加入libsqlite3.dylib
1、定义模型
[cpp] #import <Foundation/Foundation.h>
#import "sqlite3.h"
@class NotePad;
@class NoteDb;
@interface NoteSqlite : NSObject{
sqlite3 *database;
sqlite3_stmt *statement;
char *errorMsg;
}
//打开数据库
-(BOOL)open;
//创建青
-(BOOL)create;
//增加、删除、修改、查询
-(BOOL)insert:(NotePad*)aNote;
-(BOOL)deleteALLNote;
-(BOOL)deleteaNote:(NotePad*)aNote;
-(BOOL)update:(NotePad*)aNote;
-(NoteDb*)selecteAll;
-(NoteDb*)selectNotes:(NotePad*)aNote;
@end
#import <Foundation/Foundation.h>
#import "sqlite3.h"
@class NotePad;
@class NoteDb;
@interface NoteSqlite : NSObject{
sqlite3 *database;
sqlite3_stmt *statement;
char *errorMsg;
}
//打开数据库
-(BOOL)open;
//创建青
-(BOOL)create;
//增加、删除、修改、查询
-(BOOL)insert:(NotePad*)aNote;
-(BOOL)deleteALLNote;
-(BOOL)deleteaNote:(NotePad*)aNote;
-(BOOL)update:(NotePad*)aNote;
-(NoteDb*)selecteAll;
-(NoteDb*)selectNotes:(NotePad*)aNote;
@end
2、实现方法
[cpp] #import "NoteSqlite.h"
#import "NotePad.h"
#import "NoteDb.h"
@implementation NoteSqlite
-(id)init{
self=[super init];
return self;
}
//打开数据库
-(BOOL)open{
NSArray *paths= NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:@"noteList.db"];
NSFileManager *fileManager = [NSFileManager defaultManager];
BOOL find = [fileManager fileExistsAtPath:path];
//判断文件是否存在
if (find) {
NSLog(@"数据库文件已经存在");
//打开数据库、返回操作是否正确
if(sqlite3_open([path UTF8String], &database) == SQLITE_OK) {
NSLog(@"打开成功数据库");
}
return YES;
}else{
if(sqlite3_open([path UTF8String], &database) == SQLITE_OK) {
//调用createMusicList创建数据库和表
[self create];
return YES;
} else {
sqlite3_close(database);
NSLog(@"Error: open database file.");
return NO;
}
return NO;
}
}
//创建表
-(BOOL)create{
//创建表语句
const char *createSql="create table if not exists note (id integer primary key autoincrement,theme text,information text,ndate text,priority integer)";
//创建表是否成功
if (sqlite3_exec(database, createSql, NULL, NULL, &errorMsg)==SQLITE_OK) {
NSLog(@"create ok.");
return YES;
}else{
//打印出错信息
NSLog(@"error: %s",errorMsg);
sqlite3_free(errorMsg);
}
return NO;
}
//增加、删除、修改、查询
-(BOOL)insert:(NotePad*)aNote{
//向表中插入记录
//定义一个sql语句
NSString *insertStatementNS = [NSString stringWithFormat:
@"insert into \"note\"\
(theme, information, ndate,priority)\
values (\"%@\", \"%@\", \"%@\",%d)",
aNote.theme,aNote.information,[NSString stringWithFormat:@"%@",aNote.ndate],aNote.priority
];
//将定义的NSString的sql语句，转换成UTF8的c风格的字符串
const char *insertSql = [insertStatementNS UTF8String];
//执行插入语句
if (sqlite3_exec(database, insertSql, NULL, NULL, &errorMsg)==SQLITE_OK) {
NSLog(@"insert ok.");
return YES;
}else{
NSLog(@"error: %s",errorMsg);
sqlite3_free(errorMsg);
}
return NO;
}
-(BOOL)deleteALLNote{
//删除所有数据，条件为1>0永真
const char *deleteAllSql="delete from note where 1>0";
//执行删除语句
if(sqlite3_exec(database, deleteAllSql, NULL, NULL, &errorMsg)==SQLITE_OK){
NSLog(@"删除所有数据成功");
}
return YES;
}
-(BOOL)deleteaNote:(NotePad*)aNote{
//删除某条数据
NSString *deleteString=[NSString stringWithFormat:@"delete from note where id=%d",aNote.noteId];
//转成utf-8的c的风格
const char *deleteSql=[deleteString UTF8String];
//执行删除语句
if(sqlite3_exec(database, deleteSql, NULL, NULL, &errorMsg)==SQLITE_OK){
NSLog(@"删除成功");
}
return YES;
}
-(BOOL)update:(NotePad*)aNote{
//更新语句
NSString *updateString=[NSString stringWithFormat:@"update note set theme='%@', information='%@',
ndate='%@',priority=%d where id=%d",aNote.theme,aNote.information,aNote.ndate,aNote.priority,aNote.noteId];
// NSLog(@"%@",aNote);
const char *updateSql=[updateString UTF8String];
//执行更新语句
if(sqlite3_exec(database, updateSql, NULL, NULL, &errorMsg)==SQLITE_OK){
NSLog(@"更新成功");
}
return YES;
}
-(NoteDb*)selecteAll{
NoteDb *noteDb=[[[NoteDb alloc]init]autorelease];
//查询所有语句
const char *selectAllSql="select * from note";
//执行查询
if (sqlite3_prepare_v2(database, selectAllSql, -1, &statement, nil)==SQLITE_OK) {
NSLog(@"select ok.");
//如果查询有语句就执行step来添加数据
while (sqlite3_step(statement)==SQLITE_ROW) {
NotePad *note=[[NotePad alloc]init];
int noteid=sqlite3_column_int(statement, 0);
NSMutableString *theme=[NSMutableString stringWithCString:(char*)sqlite3_column_text(statement, 1) encoding:NSUTF8StringEncoding];
NSMutableString *information=[NSMutableString stringWithCString:(char*)sqlite3_column_text(statement, 2) encoding:NSUTF8StringEncoding];
NSString *ndateString=[NSString stringWithCString:(char*)sqlite3_column_text(statement, 3) encoding:NSUTF8StringEncoding];
NSDateFormatter* formater = [[NSDateFormatter alloc] init];
[formater setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSDate *ndate=[formater dateFromString:[ndateString substringToIndex:[ndateString length]-5]];
// NSLog(@"%@",[ndateString substringToIndex:[ndateString length]-5]);
[formater release];
int proriory=sqlite3_column_int(statement, 4);
note.noteId=noteid;
note.theme=theme;
note.information=information;
note.ndate=ndate;
note.priority=proriory;
[noteDb addNote:note];
[note release];
}
return noteDb;
}
return noteDb;
}
-(NoteDb*)selectNotes:(NotePad*)aNote{
NoteDb *noteDb=[[[NoteDb alloc]init]autorelease];
NSString *selectNSSql=[NSString stringWithFormat:@"select * from note where id=%i",aNote.noteId];
//查询所有语句
const char *selectSql=[selectNSSql UTF8String];
//执行查询
if (sqlite3_prepare_v2(database, selectSql, -1, &statement, nil)==SQLITE_OK) {
NSLog(@"select ok.");
//如果查询有语句就执行step来添加数据
while (sqlite3_step(statement)==SQLITE_ROW) {
NotePad *note=[[NotePad alloc]init];
int noteid=sqlite3_column_int(statement, 0);
NSMutableString *theme=[NSMutableString stringWithCString:(char*)sqlite3_column_text(statement, 1) encoding:NSUTF8StringEncoding];
NSMutableString *information=[NSMutableString stringWithCString:(char*)sqlite3_column_text(statement, 2) encoding:NSUTF8StringEncoding];
NSString *ndateString=[NSString stringWithCString:(char*)sqlite3_column_text(statement, 3) encoding:NSUTF8StringEncoding];
NSDateFormatter* formater = [[NSDateFormatter alloc] init];
[formater setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSDate *ndate=[formater dateFromString:[ndateString substringToIndex:[ndateString length]-5]];
// NSLog(@"%@",[ndateString substringToIndex:[ndateString length]-5]);
[formater release];
int proriory=sqlite3_column_int(statement, 4);
note.noteId=noteid;
note.theme=theme;
note.information=information;
note.ndate=ndate;
note.priority=proriory;
[noteDb addNote:note];
[note release];
}
return noteDb;
}
return noteDb;
}
@end
#import "NoteSqlite.h"
#import "NotePad.h"
#import "NoteDb.h"
@implementation NoteSqlite
-(id)init{
self=[super init];
return self;
}
//打开数据库
-(BOOL)open{
NSArray *paths= NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *path = [documentsDirectory stringByAppendingPathComponent:@"noteList.db"];
NSFileManager *fileManager = [NSFileManager defaultManager];
BOOL find = [fileManager fileExistsAtPath:path];
//判断文件是否存在 www.2cto.com
if (find) {
NSLog(@"数据库文件已经存在");
//打开数据库、返回操作是否正确
if(sqlite3_open([path UTF8String], &database) == SQLITE_OK) {
NSLog(@"打开成功数据库");
}
return YES;
}else{
if(sqlite3_open([path UTF8String], &database) == SQLITE_OK) {
//调用createMusicList创建数据库和表
[self create];
return YES;
} else {
sqlite3_close(database);
NSLog(@"Error: open database file.");
return NO;
}
return NO;
}
}
//创建表
-(BOOL)create{
//创建表语句
const char *createSql="create table if not exists note (id integer primary key autoincrement,theme text,information text,ndate text,priority integer)";
//创建表是否成功
if (sqlite3_exec(database, createSql, NULL, NULL, &errorMsg)==SQLITE_OK) {
NSLog(@"create ok.");
return YES;
}else{
//打印出错信息
NSLog(@"error: %s",errorMsg);
sqlite3_free(errorMsg);
}
return NO;
}
//增加、删除、修改、查询
-(BOOL)insert:(NotePad*)aNote{
//向表中插入记录
//定义一个sql语句
NSString *insertStatementNS = [NSString stringWithFormat:
@"insert into \"note\"\
(theme, information, ndate,priority)\
values (\"%@\", \"%@\", \"%@\",%d)",
aNote.theme,aNote.information,[NSString stringWithFormat:@"%@",aNote.ndate],aNote.priority
];
//将定义的NSString的sql语句，转换成UTF8的c风格的字符串
const char *insertSql = [insertStatementNS UTF8String];
//执行插入语句
if (sqlite3_exec(database, insertSql, NULL, NULL, &errorMsg)==SQLITE_OK) {
NSLog(@"insert ok.");
return YES;
}else{
NSLog(@"error: %s",errorMsg);
sqlite3_free(errorMsg);
}
return NO;
}
-(BOOL)deleteALLNote{
//删除所有数据，条件为1>0永真
const char *deleteAllSql="delete from note where 1>0";
//执行删除语句
if(sqlite3_exec(database, deleteAllSql, NULL, NULL, &errorMsg)==SQLITE_OK){
NSLog(@"删除所有数据成功");
}
return YES;
}
-(BOOL)deleteaNote:(NotePad*)aNote{
//删除某条数据
NSString *deleteString=[NSString stringWithFormat:@"delete from note where id=%d",aNote.noteId];
//转成utf-8的c的风格
const char *deleteSql=[deleteString UTF8String];
//执行删除语句
if(sqlite3_exec(database, deleteSql, NULL, NULL, &errorMsg)==SQLITE_OK){
NSLog(@"删除成功");
}
return YES;
}
-(BOOL)update:(NotePad*)aNote{
//更新语句
NSString *updateString=[NSString stringWithFormat:@"update note set theme='%@', information='%@',
ndate='%@',priority=%d where id=%d",aNote.theme,aNote.information,aNote.ndate,aNote.priority,aNote.noteId];
// NSLog(@"%@",aNote);
const char *updateSql=[updateString UTF8String];
//执行更新语句
if(sqlite3_exec(database, updateSql, NULL, NULL, &errorMsg)==SQLITE_OK){
NSLog(@"更新成功");
}
return YES;
}
-(NoteDb*)selecteAll{
NoteDb *noteDb=[[[NoteDb alloc]init]autorelease];
//查询所有语句
const char *selectAllSql="select * from note";
//执行查询
if (sqlite3_prepare_v2(database, selectAllSql, -1, &statement, nil)==SQLITE_OK) {
NSLog(@"select ok.");
//如果查询有语句就执行step来添加数据
while (sqlite3_step(statement)==SQLITE_ROW) {
NotePad *note=[[NotePad alloc]init];
int noteid=sqlite3_column_int(statement, 0);
NSMutableString *theme=[NSMutableString stringWithCString:(char*)sqlite3_column_text(statement, 1) encoding:NSUTF8StringEncoding];
NSMutableString *information=[NSMutableString stringWithCString:(char*)sqlite3_column_text(statement, 2) encoding:NSUTF8StringEncoding];
NSString *ndateString=[NSString stringWithCString:(char*)sqlite3_column_text(statement, 3) encoding:NSUTF8StringEncoding];
NSDateFormatter* formater = [[NSDateFormatter alloc] init];
[formater setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSDate *ndate=[formater dateFromString:[ndateString substringToIndex:[ndateString length]-5]];
// NSLog(@"%@",[ndateString substringToIndex:[ndateString length]-5]);
[formater release];
int proriory=sqlite3_column_int(statement, 4);
note.noteId=noteid;
note.theme=theme;
note.information=information;
note.ndate=ndate;
note.priority=proriory;
[noteDb addNote:note];
[note release];
}
return noteDb;
}
return noteDb;
}
-(NoteDb*)selectNotes:(NotePad*)aNote{
NoteDb *noteDb=[[[NoteDb alloc]init]autorelease];
NSString *selectNSSql=[NSString stringWithFormat:@"select * from note where id=%i",aNote.noteId];
//查询所有语句
const char *selectSql=[selectNSSql UTF8String];
//执行查询
if (sqlite3_prepare_v2(database, selectSql, -1, &statement, nil)==SQLITE_OK) {
NSLog(@"select ok.");
//如果查询有语句就执行step来添加数据
while (sqlite3_step(statement)==SQLITE_ROW) {
NotePad *note=[[NotePad alloc]init];
int noteid=sqlite3_column_int(statement, 0);
NSMutableString *theme=[NSMutableString stringWithCString:(char*)sqlite3_column_text(statement, 1) encoding:NSUTF8StringEncoding];
NSMutableString *information=[NSMutableString stringWithCString:(char*)sqlite3_column_text(statement, 2) encoding:NSUTF8StringEncoding];
NSString *ndateString=[NSString stringWithCString:(char*)sqlite3_column_text(statement, 3) encoding:NSUTF8StringEncoding];
NSDateFormatter* formater = [[NSDateFormatter alloc] init];
[formater setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSDate *ndate=[formater dateFromString:[ndateString substringToIndex:[ndateString length]-5]];
// NSLog(@"%@",[ndateString substringToIndex:[ndateString length]-5]);
[formater release];
int proriory=sqlite3_column_int(statement, 4);
note.noteId=noteid;
note.theme=theme;
note.information=information;
note.ndate=ndate;
note.priority=proriory;
[noteDb addNote:note];
[note release];
}
return noteDb;
}
return noteDb;
}
@end
iphone数据库（sqlite3）的用法操作oc,xcode的更多相关文章
- [python][django学习篇][5]选择数据库版本（默认SQLite3） 与操作数据库
推荐学习博客:http://zmrenwu.com/post/6/ 选择数据库版本(SQLite3) 如果想选择MySQL等版本数据库,请先安装MySQL并且安装python mysql驱动,这里不做 ...
- iphone/iOS 访问本地数据库sqlite3
Phone也支持访问本地数据库Sqlite 3.这里简单的介绍一下iPhone上Sqlite 3的使用方法. 首先需要在项目中引用Sqlite 3的开发包,下面是在iPhone SDK 3.0下的目录 ...
- iOS开发中的4种数据持久化方式【二、数据库 SQLite3、Core Data 的运用】
在上文,我们介绍了ios开发中的其中2种数据持久化方式:属性列表.归档解档.本节将继续介绍另外2种iOS持久化数据的方法:数据库 SQLite3.Core Data 的运 ...
- 数据库(SQLITE3函数总结): sqlite3_open, sqlite3_exec, slite3_close,sqlite3_prepare_v2,sqlite3_column_text,
Sqlite3 的确非常好用.小巧.速度快.近期研究它,有一些收获,这里把我对 sqlite3 的研究列出来,以备忘记. 导入SQLLite library并引入头文件. libsqlite3.dyl ...
- 我的Android进阶之旅------>温习Sqlite3的常用操作
前言;今天要写一个应用来调节系统的Brightness值,来改变系统的背光亮度.由于刚开始些的时候没有考虑Brightness的最小值,直接托动SeekBar到最小值(为0).瞬间,屏幕变成全黑,失败 ...
- Android中如何使用命令行查看内嵌数据库SQLite3
转载博客:http://www.linuxidc.com/Linux/2011-06/37135.htm 在上图中,除了最后一个红色的方框,其它方框都是adb shell下的命令. [1]在Andro ...
- SQL用法操作合集
SQL用法操作合集 一.表的创建 1.创建表 格式: 1 CREATE TABLE 表名 2 (列名 数据类型(宽度)[DEFAULT 表达式][COLUMN CONSTRAINT], 3 ... ...
- (转)SQLite数据库增删改查操作
原文:http://www.cnblogs.com/linjiqin/archive/2011/05/26/2059182.html SQLite数据库增删改查操作 一.使用嵌入式关系型SQLite数 ...
- Android SQLite 数据库 增删改查操作
Android SQLite 数据库 增删改查操作 转载▼ 一.使用嵌入式关系型SQLite数据库存储数据 在Android平台上,集成了一个嵌入式关系型数据库--SQLite,SQLite3支持NU ...
随机推荐
- matlab各向异性扩散滤波
主要是用来平滑图像的,克服了高斯模糊的缺陷,各向异性扩散在平滑图像时是保留图像边缘的(和双边滤波很像). 通常我们有将图像看作矩阵的,看作图的,看作随机过程的,记得过去还有看作力场的. 这次新鲜,将图 ...
- jQuery事件，对象以及插件
回顾 1 基本使用 2 jquery 选择器 3 筛选器 过滤 查找 串联 4 DOM 操作 内部插入 append()appendTo()prepend()prependTo() 外部插入 afte ...
- HTTPs与HTTP的性能
(参考:https://blog.csdn.net/chinafire525/article/details/78911734 https://blog.csdn.net/hherima/articl ...
- 历史管理 onhashchange
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/ ...
- 二、pandas入门
import numpy as np import pandas as pd Series: #创建Series方法1 s1=pd.Series([1,2,3,4]) s1 # 0 1 # 1 2 # ...
- 精选30道Java笔试题附答案分析
精选30道Java笔试题解答 都是一些非常非常基础的题,是我最近参加各大IT公司笔试后靠记忆记下来的,经过整理献给与我一样参加各大IT校园招聘的同学们,纯考Java基础功底,老手们就不用进来了,免得笑 ...
- Linux内核漏洞利用-环境配置（转）
实验环境: Ubuntu-14.04.1 x86 linux-2.6.32.1 busybox-1.27.2 qemu 0x00 安装qemu sudo apt-get install qemu qe ...
- 【整理】C#文件操作大全
文件与文件夹操作主要用到以下几个类: 1.File类: 提供用于创建.复制.删除.移动和打开文件的静态方法,并协助创建 FileStream 对象. msdn:http://msdn.microsof ...
- java在线聊天项目0.9版 实现把服务端接收到的信息返回给每一个客户端窗口中显示功能之客户端接收
客户端要不断接收服务端发来的信息 与服务端不断接收客户端发来信息相同,使用线程的方法,在线程中循环接收 客户端修改后代码如下: package com.swift; import java.awt.B ...
- ios 检查内存泄露
简介 在IPhone程式开发中,记忆体泄漏(内存泄漏)是个很容易发生的情况,因为IPhone必须自行作记忆体管理.现在的开发者,大多习惯用的.NET或Java的等有垃圾回收机制的开发语言来作开发,因此 ...