iOS sqlite對資料庫的各種操作(日常整理全)_IOS

在IOS中使用Sqlite來處理資料。如果你已經瞭解了SQL，那你可以很容易的掌握SQLite資料庫的操作。iOS對於資料庫的操作：增加、刪除、尋找、修改具體介紹如下所示：

首先需要建立一個資料庫：本程式的資料庫是在Firefox瀏覽器裡的外掛程式裡寫的微量型資料庫

Firefox找尋找SQLite Manager的步驟：

第一步：在工具列找到附加組件，點擊進入

第二步：搜尋 SQP，找到並下載，安裝完成之後需要重啟瀏覽器

第三步：在工具只樂觀找到SQLite Manager，點擊開啟

SQLite Manager介面如圖所示

註：SQLite Manager是微量型的資料庫編程軟體，所以一次只能執行一句代碼！！！

•建立資料庫

--資料庫的建立create table team(　-- 建立名字為team的table　　stu_id integer primary key autoincrement, 　　stu_name varchar(100), 　　stu_password varchar(100), 　　stu_login varchar(100) )--添加資訊 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') --查詢資訊select *from team --刪除資訊delete from team where stu_id=3 

工程目錄檔案如下：

這裡需要匯入一個系統內建的檔案libsqlite3.0.tbd

步驟如圖：

•實現工程

ViewController.h

#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 

ViewController.h

#import "ViewController.h"#define PATH [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"team.sqlite"]@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad {[super viewDidLoad];// 擷取沙箱 Documents檔案路徑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:@"資料庫顯示" 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:@"資料庫添加" 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:@"資料庫修改" 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:@"資料庫刪除" forState:UIControlStateNormal];[self.deletebtn addTarget:self action:@selector(deleteSql) forControlEvents:UIControlEventTouchUpInside];[self.view addSubview:self.deletebtn];}#pragma mark - 顯示資料表中的所有資訊-(void)showSql{NSLog(@"顯示資料庫資訊");// 資料庫sqlite3 *db;// 根據指定的資料庫檔案儲存路徑開啟資料庫int result=sqlite3_open([PATH UTF8String], &db);// 建立執行命令對象sqlite3_stmt *stmt;// 開啟資料庫成功if (result==SQLITE_OK) {NSLog(@"串連成功");// 執行預先處理命令int res=sqlite3_prepare_v2(db, "select *from team", -1, &stmt, nil);if (res==SQLITE_OK) {// 迴圈遍曆資料表的行資訊while (sqlite3_step(stmt)==SQLITE_ROW) {// 擷取資料表中整型列的資訊int stu_id=sqlite3_column_int(stmt, 0);NSLog(@"stu_id is %d",stu_id);// 擷取資料表中字元型的列的資訊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 -增加資訊-(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 - 修改資料庫-(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

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