在ios中使用sqlite来处理数据。如果你已经了解了sql，那你可以很容易的掌握sqlite数据库的操作。ios对于数据库的操作：增加、删除、查找、修改具体介绍如下所示：
首先需要创建一个数据库：本程序的数据库是在火狐浏览器里的插件里写的微量型数据库
火狐找查找sqlite manager的步骤：
第一步：在工具栏找到附加组件，点击进入
第二步：搜索 sqp，找到并下载，安装完成之后需要重启浏览器
第三步：在工具只乐观找到sqlite manager，点击打开
sqlite manager界面如图所示
注：sqlite manager是微量型的数据库编程软件，所以一次只能执行一句代码！！！
•创建数据库
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--数据库的建立
create table team
( -- 创建名字为team的table stu_id integer primary key autoincrement, stu_name varchar(100), stu_password varchar(100), stu_login varchar(100) )--添加信息 insert into team(stu_name,stu_password,stu_login) values('xiaming','123456','xm') insert into team(stu_name,stu_password,stu_login) values('zhangsan','123456',' zs') --查询信息select *from team --删除信息delete from team where stu_id=3
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工程目录文件如下：
这里需要导入一个系统自带的文件libsqlite3.0.tbd
步骤如图：
•实现工程
viewcontroller.h
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#import <uikit/uikit.h>
#import <sqlite3.h>
@interface viewcontroller : uiviewcontroller
@property(strong,nonatomic)uibutton *showbtn;
@property(strong,nonatomic)uibutton *insertbtn;
@property(strong,nonatomic)uibutton *updatebtn;
@property(strong,nonatomic)uibutton *deletebtn;
@end
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viewcontroller.h
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#import "viewcontroller.h"
#define path [[nssearchpathfordirectoriesindomains(nsdocumentdirectory, nsuserdomainmask, yes) lastobject] stringbyappendingpathcomponent:@"team.sqlite"]
@interface viewcontroller ()
@end
@implementation viewcontroller
- (void)viewdidload {
[super viewdidload];
// 获取沙盒 documents文件路径
nslog(@"%@",[nssearchpathfordirectoriesindomains(nsdocumentdirectory, nsuserdomainmask, yes) lastobject]);
[self button];
}
-(void)button
{
self.showbtn=[uibutton buttonwithtype:uibuttontypesystem];
self.showbtn.frame=cgrectmake(100, 50, 200, 50);
[self.showbtn settitle:@"数据库显示" forstate:uicontrolstatenormal];
[self.showbtn addtarget:self action:@selector(showsql) forcontrolevents:uicontroleventtouchupinside];
[self.view addsubview:self.showbtn];
self.insertbtn=[uibutton buttonwithtype:uibuttontypesystem];
self.insertbtn.frame=cgrectmake(100, 100, 200, 50);
[self.insertbtn settitle:@"数据库添加" forstate:uicontrolstatenormal];
[self.insertbtn addtarget:self action:@selector(insertsql) forcontrolevents:uicontroleventtouchupinside];
[self.view addsubview:self.insertbtn];
self.updatebtn=[uibutton buttonwithtype:uibuttontypesystem];
self.updatebtn.frame=cgrectmake(100, 150, 200, 50);
[self.updatebtn settitle:@"数据库修改" forstate:uicontrolstatenormal];
[self.updatebtn addtarget:self action:@selector(updatesql) forcontrolevents:uicontroleventtouchupinside];
[self.view addsubview:self.updatebtn];
self.deletebtn=[uibutton buttonwithtype:uibuttontypesystem];
self.deletebtn.frame=cgrectmake(100, 200, 200, 50);
[self.deletebtn settitle:@"数据库删除" forstate:uicontrolstatenormal];
[self.deletebtn addtarget:self action:@selector(deletesql) forcontrolevents:uicontroleventtouchupinside];
[self.view addsubview:self.deletebtn];
}
#pragma mark - 显示数据表中的所有信息
-(void)showsql
{
nslog(@"显示数据库信息");
// 数据库
sqlite3 *db;
// 根据指定的数据库文件存储路径打开数据库
int result=sqlite3_open([path utf8string], &db);
// 创建执行命令对象
sqlite3_stmt *stmt;
// 打开数据库成功
if (result==sqlite_ok) {
nslog(@"连接成功");
// 执行预处理命令
int res=sqlite3_prepare_v2(db, "select *from team", -1, &stmt, nil);
if (res==sqlite_ok) {
// 循环遍历数据表的行信息
while (sqlite3_step(stmt)==sqlite_row) {
// 获取数据表中整型列的信息
int stu_id=sqlite3_column_int(stmt, 0);
nslog(@"stu_id is %d",stu_id);
// 获取数据表中字符型的列的信息
nslog(@"%@",[nsstring stringwithformat:@"%s",sqlite3_column_text(stmt, 1)]);
nslog(@"%@",[nsstring stringwithformat:@"%s",sqlite3_column_text(stmt, 2)] );
nslog(@"%@",[nsstring stringwithformat:@"%s",sqlite3_column_text(stmt, 3)] );
}
}
}
}
#pragma mark -增加信息
-(void)insertsql
{
sqlite3 *db;
sqlite3_stmt *stmt;
sqlite3_open([path utf8string], &db);
int rst=sqlite3_prepare_v2(db, "insert into team(stu_name,stu_password,stu_login) values(?,?,?)", -1, &stmt, nil);
sqlite3_bind_text(stmt, 1, "wangwu", -1, nil);
sqlite3_bind_text(stmt, 2, "123456", -1, nil);
sqlite3_bind_text(stmt, 3, "ww", -1, nil);
// 判断是否增加成功
if (rst==sqlite_ok) {
if (sqlite_done==sqlite3_step(stmt)) {
nslog(@"add ok");
}else{
nslog(@"add fail");
}
}
}
#pragma mark - 修改数据库
-(void)updatesql
{
sqlite3 *db;
sqlite3_stmt *stmt;
sqlite3_open([path utf8string], &db);
// 方法一
/*
int res = sqlite3_prepare_v2(db, "update team set stu_name=(?),stu_password=(?),stu_login=(?) where stu_id=2" , -1, &stmt, nil);
sqlite3_bind_text(stmt, 1, "xiaoming", -1, nil);
sqlite3_bind_text(stmt, 2, "123456", -1, nil);
sqlite3_bind_text(stmt, 3, "xm", -1, nil);
*/
// 方法二
int rst=sqlite3_prepare_v2(db, "update team setstu_name='zl',stu_password='zl123',stu_login='zhangsan' where stu_id=4", -1, &stmt, nil);
// 判断是否修改成功
if (rst==sqlite_ok) {
if (sqlite_done == sqlite3_step(stmt)) {
nslog(@" update ok");
}else{
nslog(@"update fail");
}
}
}
-(void)deletesql
{
sqlite3 *db;
sqlite3_stmt *stmt;
sqlite3_open([path utf8string], &db);
int rst=sqlite3_prepare_v2(db, "delete from team where stu_id=9", -1, &stmt, nil);
// 判断是否删除成功
if (rst==sqlite_ok) {
if (sqlite_done==sqlite3_step(stmt)) {
nslog(@" delete ok");
}else{
nslog(@"delete fail");
}
}
}
- (void)didreceivememorywarning {
[super didreceivememorywarning];
// dispose of any resources that can be recreated.
}
@end
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以上内容是小编给大家日常收集整理的ios sqlite对数据库的各种操作，希望对大家有所帮助，如果大家想了解更多有关ios sqlite相关知识请登录服务器之家网站了解详情，同时也非常感谢大家一直以来对服务器之家网站的支持！