--數(shù)據(jù)庫的建立
create table team
(　-- 創(chuàng)建名字為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') --查詢信息select *from team --刪除信息delete from team where stu_id=3 

#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 

#import "ViewController.h"
#define PATH [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"team.sqlite"]
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// 獲取沙盒 Documents文件路徑
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:@"數(shù)據(jù)庫顯示" 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:@"數(shù)據(jù)庫添加" 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:@"數(shù)據(jù)庫修改" 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:@"數(shù)據(jù)庫刪除" forState:UIControlStateNormal];
[self.deletebtn addTarget:self action:@selector(deleteSql) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:self.deletebtn];
}
#pragma mark - 顯示數(shù)據(jù)表中的所有信息
-(void)showSql
{
NSLog(@"顯示數(shù)據(jù)庫信息");
// 數(shù)據(jù)庫
sqlite3 *db;
// 根據(jù)指定的數(shù)據(jù)庫文件存儲路徑打開數(shù)據(jù)庫
int result=sqlite3_open([PATH UTF8String], &db);
// 創(chuàng)建執(zhí)行命令對象
sqlite3_stmt *stmt;
// 打開數(shù)據(jù)庫成功
if (result==SQLITE_OK) {
NSLog(@"連接成功");
// 執(zhí)行預處理命令
int res=sqlite3_prepare_v2(db, "select *from team", -1, &stmt, nil);
if (res==SQLITE_OK) {
// 循環(huán)遍歷數(shù)據(jù)表的行信息
while (sqlite3_step(stmt)==SQLITE_ROW) {
// 獲取數(shù)據(jù)表中整型列的信息
int stu_id=sqlite3_column_int(stmt, 0);
NSLog(@"stu_id is %d",stu_id);
// 獲取數(shù)據(jù)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);
// 判斷是否增加成功
if (rst==SQLITE_OK) {
if (SQLITE_DONE==sqlite3_step(stmt)) {
NSLog(@"add ok");
}else{
NSLog(@"add fail");
}
}
}
#pragma mark - 修改數(shù)據(jù)庫
-(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);
// 判斷是否修改成功
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);
// 判斷是否刪除成功
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