ios FMDB數據庫添刪改查應用

 

本文原創，轉載請注明出處！

　　哦吼吼，又研究了幾天，把FMDB這個封裝好的數據庫搞定了，寫了個簡單的例子，基於FMDB的添刪改查操作，界面很一般了，代碼可能比較亂，希望不要傷了各位的眼睛。依舊是純代碼實現的，沒有用到任何IB，其中添加刪除更改的操作都非常簡單，不需要做太多操作，只需要用到FMDB封裝好的executeUpdate方法就行了。搜索功能用到了UISearchDisplayController這個控件，因為以前沒有用過，研究了一天才搞定。下面對界面做簡單的說明：

　　整個界面使用一個UITabBarController實現的，一共有三個TabBarItem，第一個是通訊錄，我重寫了cell，在每一行可以顯示姓名，電話和ID。我要說明一下ID，ID最好每個人的都不要寫成一樣的，如果兩個人的姓名一樣，ID也一樣的話，在刪除一個人的時候會把兩個人的信息都刪掉。右上角是更新button，先選擇某一項，再點那個button就可以進入更新界面。下面來看更新界面：

進入更新界面，可以更新姓名和電話，ID是不可更改的，為什么呢，因為在操作數據庫的時候必須要有一個主鍵（PRIMARY KEY），作為區分每條數據的標識。注意右上角是save。下面來看添加信息的頁面，也就是第二個TabBarItem：

可以添加姓名，電話和ID，注意ID不要和其他的相同！再來看第三個TabBarItem，搜索功能，這是我新學的一個知識，用UISearchDisplayController和UISearchBar來實現的搜索，因為用這兩個可以達到最好的圖像效果

搜索出來的數據點擊某一行可以進入詳情：

這個頁面就簡單了，沒什么可說的了，一目了然。

下面為大家呈上代碼，首先要在AppDelegate.m文件里做修改，要放入一個UITabBar

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
    // Override point for customization after application launch.
    self.viewController = [[[ViewController alloc] initWithNibName:@"ViewController" bundle:nil] autorelease];
    //因為有三個tabBarItem，我把系統默認的viewController放在了第一個，然后再新建兩個繼承自UIViewController的類AddUserInfo和SearchInfo
    UINavigationController *viewController = [[UINavigationController alloc]initWithRootViewController:self.viewController];
    viewController.tabBarItem = [[UITabBarItem alloc]initWithTabBarSystemItem:UITabBarSystemItemContacts tag:101];
    //將viewController初始化為第一個tabBarItem
    AddUserInfo *adduserViewController = [[AddUserInfo alloc]init];
    adduserViewController.title = @"添加用戶信息";
    adduserViewController.tabBarItem = [[UITabBarItem alloc]initWithTabBarSystemItem:UITabBarSystemItemTopRated tag:102];
//將adduserViewController初始化為第二個tabBarItem
    SearchInfo *searchViewController = [[SearchInfo alloc]init];
    searchViewController.tabBarItem = [[UITabBarItem alloc]initWithTabBarSystemItem:UITabBarSystemItemSearch tag:103];
    searchViewController.title = @"搜索信息";
    //將searchViewController初始化為第三個tabBarItem，現在已經准備了UITabBarController上的三個tabBarItem了，但是每一個tabBarItem都需要放到UINavigationController上來控制視圖，在初始化兩個UINavigationController，還有一個在上面。
    UINavigationController *nav1= [[UINavigationController alloc]initWithRootViewController:adduserViewController];
    
    UINavigationController *nav2 = [[UINavigationController alloc]initWithRootViewController:searchViewController];
    
    NSArray *ViewControllerArray = [[NSArray alloc]initWithObjects:viewController,nav1,nav2, nil];

//    將三個UINavigationController添加到一個數組里，tabBarItem已經搞定了，但是主要的UITabBarController我們現在來初始化。
    UITabBarController *tabBarController = [[UITabBarController alloc]init];
//注意這里的用法，tabBarController.viewControllers是tabBarController的一個數組類型的屬性，它存放的是UINavigationController
    tabBarController.viewControllers = ViewControllerArray;
    tabBarController.selectedIndex = 0;//初始顯示第一個tabBarItem
    tabBarController.delegate = self;//別忘了設置代理，在頭文件里要加上 <UIApplicationDelegate,UITabBarControllerDelegate>這兩個
    
    self.window.rootViewController = tabBarController;
    [self.window makeKeyAndVisible];
    
    [nav1 release];
    [nav2 release];
    [tabBarController release];
    [ViewControllerArray release];
    [searchViewController release];
    [adduserViewController release];
    [viewController release];

    return YES;
}

接下來去下載FMDB工程項目https://github.com/ccgus/fmdb.git

下載下來的是一個demo，大家可以把src文件夾拖出來再改名為FMDB，拖進自己的項目及就行了

在項目里添加libsqlite3.dylib，SenTestingKit.framework兩個庫，還有頭文件#import "FMDatabase.h"和
#import "FMDatabaseQueue.h"

來看看通訊錄頁面ViewController.h

#import <UIKit/UIKit.h>
#import "FMDatabase.h"
#import "FMDatabaseQueue.h"

@class dataFromDataBase;
@interface ViewController : UIViewController<UITableViewDelegate,UITableViewDataSource>
{
    
}
@property (nonatomic, retain) NSString * dbPath;
@property (nonatomic, retain) NSMutableArray *nameArray;
@property (nonatomic, retain) NSMutableArray *phoneArray;
@property (nonatomic, retain) NSMutableArray *IDArray;

@property (nonatomic, retain) UITableView *table;
- (void)createTable;
@end

@interface dataFromDataBase : NSObject {//新建一個類，專門用於保存數據
@private
    NSString *nameFromClass;
    NSString *phoneFromClass;
    NSString *IDFromClass;
    NSMutableArray *nameArrayFromClass;
}
+(dataFromDataBase*)shareFromDataBase;//神奇的單例
@property(retain,nonatomic) NSString *nameFromClass;

@property(retain,nonatomic)NSString *phoneFromClass;

@property(retain,nonatomic)NSString *IDFromClass;
@property(retain,nonatomic)NSMutableArray *nameArrayFromClass;

@end

ViewController.m

//
//  ViewController.m
//  tabbartest
//
//  Created by changjian on 12-12-8.
//  Copyright (c) 2012年 __MyCompanyName__. All rights reserved.
//

#import "ViewController.h"
#import "AddUserInfo.h"

@implementation ViewController
@synthesize dbPath;
@synthesize nameArray,phoneArray,IDArray;
@synthesize table;


- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Release any cached data, images, etc that aren't in use.
}

#pragma mark - View lifecycle

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.title = @"通訊錄";
    UITableView *tableView = [[UITableView alloc]initWithFrame:CGRectMake(0, 0, 320, 369) style:UITableViewStylePlain];
    tableView.delegate = self;
    tableView.dataSource = self;
    self.table = tableView;
    [self.view addSubview:tableView];
    
    UIBarButtonItem *refreshBtn = [[UIBarButtonItem  alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemRefresh target:self action:@selector(modifyDatabase)];
    self.navigationItem.rightBarButtonItem = refreshBtn;
    [refreshBtn release];
    
    
}

#pragma mark -tableview-
- (UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
//    NSString *CustomIdentifier =  [NSString stringWithFormat:@"cell%d",indexPath.row];
    
    static NSString *CustomIdentifier = @"cell";
//    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CustomIdentifier];
    UITableViewCell *cell = nil;
    if (cell == nil) {
        cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CustomIdentifier];
    }
//    while ([cell.contentView.subviews lastObject] != nil){
        [(UIView*)[cell.contentView.subviews lastObject]removeFromSuperview];//當再次刷新的時候會自動添加新的cell，出現疊加情況，用這種方法可以去掉上一次添加的cell.contentView.subviews
    if (indexPath.row == 0)//這里注意，因為第一行不顯示數據，所以做個判斷
        cell.selectionStyle = UITableViewCellSelectionStyleNone;
    if (indexPath.row > 0) {//從第二行開始顯示數據
//        cell.textLabel.text = [dataArray objectAtIndex:(indexPath.row - 1)];//注意這里是從indexPath.row - 1行開始
        UILabel *nameLabel = [[UILabel alloc]initWithFrame:CGRectMake(0+40, 10, 70, 30)];
        UILabel *phoneLabel = [[UILabel alloc]initWithFrame:CGRectMake(90+40, 10, 70, 30)];
        UILabel *IDLabel = [[UILabel alloc]initWithFrame:CGRectMake(180+40, 10, 70, 30)];
        nameLabel.text = [self.nameArray objectAtIndex:(indexPath.row-1)];
        IDLabel.text = [self.IDArray objectAtIndex:(indexPath.row-1)];
        phoneLabel.text = [self.phoneArray objectAtIndex:(indexPath.row-1)];
        [cell.contentView addSubview:nameLabel];
        [cell.contentView addSubview:IDLabel];
        [cell.contentView addSubview:phoneLabel];
        [nameLabel release];
        [IDLabel release];
        [phoneLabel release];
    }    else 
    {
        for (int i = 0; i < 3; i ++) {
            UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(90 * i + 40, 10, 70 , 30)];
            NSArray *array = [NSArray arrayWithObjects:@"姓名",@"電話",@"ID", nil];
            label.text = [array objectAtIndex:i];
            label.backgroundColor = [UIColor clearColor];
            [cell.contentView addSubview:label];
            [label release];
            label = nil;
        }
    }
//    }
    return cell;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [nameArray count] + 1;//注意這里，因為第一行不顯示數據，返回要加一行
}

- (NSIndexPath*)tableView:(UITableView *)tableView willSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (indexPath.row == 0) {
        return nil;//讓第一行不能點擊
    }
    else
        return indexPath;
}


- (void)createTable//創建數據庫中表的方法，利用封裝好的庫很簡單
{
    NSFileManager *fileManager = [NSFileManager defaultManager];
    if (![fileManager fileExistsAtPath:self.dbPath]) {
        NSLog(@"表不存在，創建表");
        FMDatabase *db =[FMDatabase databaseWithPath:self.dbPath];
        if ([db open]) {
            NSString *sql = @"CREATE TABLE 'USER'('id' INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, 'name' VARCHAR(20),'phone' VARCHAR(20),'idcode' VARCHAR(30))    ";//sql語句
            BOOL success = [db executeUpdate:sql];
            if (!success) {
                NSLog(@"error when create table ");
            }else{
                NSLog(@"create table succeed");
            }
            [db close];
        }else{
            NSLog(@"database open error");
        }
    }
}

- (void)getAllDatabase//從數據庫中獲得所有數據
{
    FMDatabase *db = [FMDatabase databaseWithPath:self.dbPath];
    if ([db open]) {
        NSString *sql = @"SELECT * FROM USER";
        FMResultSet *rs = [db executeQuery:sql];
        while ([rs next]) {
            NSString *name = [rs stringForColumn:@"name"];
            NSString *phone = [rs stringForColumn:@"phone"];
            NSString *ID = [rs stringForColumn:@"idcode"];
            
            [self.nameArray addObject:name];
            [self.phoneArray addObject:phone];
            [self.IDArray addObject:ID];
        }
        [[dataFromDataBase shareFromDataBase].nameArrayFromClass arrayByAddingObjectsFromArray:self.nameArray];
        NSLog(@"self.nameArray==%@",self.nameArray);
        [db close];
        [table reloadData];
    }
    
}

- (void)modifyDatabase//選中相應的行，進入更新界面，注意這里沒有對數據庫進行操作
{
    NSIndexPath *indexPath = [self.table indexPathForSelectedRow];
    
    if (indexPath == nil) {
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" 
                                                        message:@"請選擇要更新的項" 
                                                       delegate:self
                                              cancelButtonTitle:@"好" 
                                              otherButtonTitles:nil];
        [alert show];
        [alert release];
        return;
    }
    else{
        AddUserInfo *modify = [[AddUserInfo alloc]init];        modify.operateType = 1;
//下面的方法是將選中的行的數據存進單例，再傳到另一個類里面
        [dataFromDataBase shareFromDataBase].nameFromClass = [self.nameArray objectAtIndex:(indexPath.row-1)];
        [dataFromDataBase shareFromDataBase].IDFromClass = [self.IDArray objectAtIndex:(indexPath.row-1)];
        [dataFromDataBase shareFromDataBase].phoneFromClass = [self.phoneArray objectAtIndex:(indexPath.row-1)];
        NSLog(@"datafromdatabase.nameFromClass==%@",[dataFromDataBase shareFromDataBase].nameFromClass);

        [self.navigationController pushViewController:modify animated:YES];//跳轉到修改頁面
        [modify release];
    }
}


- (void)viewDidUnload
{
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}

- (void)dealloc {
    [nameArray release];
    [phoneArray release];
    [IDArray release];
    [super dealloc];
}

- (void)viewWillAppear:(BOOL)animated
{

    NSString *document = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0];
    NSString *path = [document stringByAppendingPathComponent:@"USER.sqlite"];
    self.dbPath = path;
//注意以上三句話是獲取數據庫路徑必不可少的，在viewDidload之前就已經准備好了
    nameArray = [[NSMutableArray alloc]init];
    phoneArray = [[NSMutableArray alloc]init];
    IDArray = [[NSMutableArray alloc]init];
    [self createTable];
    [self getAllDatabase];
}

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
}

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
}

- (void)viewDidDisappear:(BOOL)animated
{
    [super viewDidDisappear:animated];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}

@end

@implementation dataFromDataBase//這個類專門用來保存數據
@synthesize nameFromClass,phoneFromClass,IDFromClass;
@synthesize nameArrayFromClass;

static dataFromDataBase *sharedInstance = nil;
+(dataFromDataBase*)shareFromDataBase//偉大的單例，
{
    if (sharedInstance == nil) {
        sharedInstance = [[dataFromDataBase alloc]init];
    }
    return sharedInstance;
}

- (id)init {
    self = [super init];
    if (self) {
        nameFromClass = @"";
        phoneFromClass = @"";
        IDFromClass = @"";
        nameArrayFromClass = [[NSMutableArray alloc]initWithCapacity:0];
    }
    return self;
}

- (void)dealloc {
    if (nameFromClass!= nil){
    [nameFromClass release];
        }
    if (phoneFromClass!=nil){
    [phoneFromClass release];
    }
    if (IDFromClass != nil){
    [IDFromClass release];
    }
    if (nameArrayFromClass != nil) {
        [nameArrayFromClass release];
    }
    [super dealloc];
}



@end

下面是AddUserInfo.h文件

#import <UIKit/UIKit.h>
#import "ViewController.h"


@interface AddUserInfo : UIViewController<UITextFieldDelegate,UIAlertViewDelegate>
{
    int operateType;//保存操作類型，0是添加，1是修改
}
- (void)createTable;
@property (retain,nonatomic)NSMutableArray *textFieldArray;
@property (retain,nonatomic)NSString *dbPath;
@property (retain,nonatomic)UITextField *nameTextField;
@property (retain,nonatomic)UITextField *phoneTextField;
@property (retain,nonatomic)UITextField *IDTextField;
@property (nonatomic,assign)int operateType;
@end

AddUserInfo.m文件

//
//  AddUserInfo.m
//  tabbartest
//
//  Created by changjian on 12-12-8.
//  Copyright (c) 2012年 __MyCompanyName__. All rights reserved.
//

#import "AddUserInfo.h"
#import "FMDatabase.h"
#import "FMDatabaseQueue.h"
#import "UserDetailInfo.h"


@implementation AddUserInfo
@synthesize textFieldArray;
@synthesize dbPath;
@synthesize nameTextField;
@synthesize phoneTextField;
@synthesize IDTextField;
@synthesize operateType;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        textFieldArray = [[NSMutableArray alloc]init];
    }
    return self;
}

- (void)didReceiveMemoryWarning
{
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];
    
    // Release any cached data, images, etc that aren't in use.
}

#pragma mark - View lifecycle

- (void)viewDidLoad
{
    [super viewDidLoad];
    NSString *doc = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
    NSString *path = [doc stringByAppendingPathComponent:@"user.sqlite"];
    NSLog(@"path===%@",path);
    self.dbPath = path;
    
    NSArray *array = [NSArray arrayWithObjects:@"姓名",@"電話",@"ID", nil];
    for (int i = 0; i < 3 ; i++)
    {
        UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake( 70,i * 40 + 34, 100, 30)];
        label.text = [array objectAtIndex:i];
        [self.view addSubview:label];
    }
    
    nameTextField = [[UITextField alloc]initWithFrame:CGRectMake(150, 38, 100, 30)];
    nameTextField.borderStyle = UITextBorderStyleRoundedRect;
    nameTextField.placeholder = @"請輸入姓名";
    nameTextField.delegate = self;
    [self.view addSubview:nameTextField];
    phoneTextField = [[UITextField alloc]initWithFrame:CGRectMake(150, 78, 100, 30)];
    phoneTextField.borderStyle = UITextBorderStyleRoundedRect;
    phoneTextField.placeholder = @"請輸入電話";
    phoneTextField.delegate = self;
    [self.view addSubview:phoneTextField];
    IDTextField = [[UITextField alloc]initWithFrame:CGRectMake(150, 118, 100, 30)];
    IDTextField.borderStyle = UITextBorderStyleRoundedRect;
    IDTextField.placeholder = @"請輸入ID";
    IDTextField.delegate = self;
    [self.view addSubview:IDTextField];
    if (operateType == 1) {//operateType == 1時為修改

        nameTextField.text = [dataFromDataBase shareFromDataBase].nameFromClass;
        IDTextField.text = [dataFromDataBase shareFromDataBase].IDFromClass;
        phoneTextField.text = [dataFromDataBase shareFromDataBase].phoneFromClass;
        IDTextField.enabled = NO;
        NSLog(@"datafromdatabase.nameFromClass=%@",[dataFromDataBase shareFromDataBase].nameFromClass);

    }
    NSLog(@"operateType==%d",operateType);
    if (operateType == 0){
    UIBarButtonItem *addBtn = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(addNewUserInfo)];
        self.navigationItem.rightBarButtonItem = addBtn;
    }
    if(operateType == 1){//這里是后來添加的，其實可以放到上面
        UIBarButtonItem *addBtn = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemSave target:self action:@selector(addNewUserInfo)];
        self.navigationItem.rightBarButtonItem = addBtn;

    }
    
    // Do any additional setup after loading the view from its nib.
}

- (void)addNewUserInfo//添加用戶信息的方法，用FMDB封裝好的方法
{
    FMDatabase *db = [[FMDatabase alloc]initWithPath:self.dbPath];
    NSString *mes = nil;
    if ([db open]) {

            if (nameTextField.text.length == 0||phoneTextField.text.length == 0||IDTextField.text.length == 0){
                mes = @"請完成填寫信息";
            }else{
                NSLog(@"姓名==%@,電話==%@,ID==%@",nameTextField.text,phoneTextField.text,IDTextField.text);
                NSString *sql= nil;
                if (operateType == 0){//執行插入操作
                    sql = @"INSERT INTO USER (name,phone,idcode) VALUES (?,?,?) ";
                }else if(operateType == 1)//執行更新操作
                {
                    sql = @"UPDATE USER  SET name = ? , phone = ? where idcode = ?";
                    
                    NSLog(@"有沒有執行？");
                }

                BOOL res = [db executeUpdate:sql,nameTextField.text,phoneTextField.text,IDTextField.text];
                if (!res) {
                    NSLog(@"error to insert data");
                    mes = @"數據插入錯誤";
                }else{
                    NSLog(@"insert succeed");
                    mes = @"數據插入成功";
                }
            }
        }else{
            NSLog(@"數據庫打開失敗") ;
    }
    UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"提示" message:mes delegate:nil cancelButtonTitle:@"確定" otherButtonTitles:nil, nil];
    [alert setTag:101];
    alert.delegate = self;
    [alert show];
    [alert release];
    [db close];
}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    if (alertView.tag == 101 && buttonIndex == 0) {
        if (operateType == 0)//如果是添加就留在該頁，如果是修改就跳回上一頁
        {
        [nameTextField resignFirstResponder];
        [phoneTextField resignFirstResponder];
        [IDTextField resignFirstResponder];
        nameTextField.text = @"";
        phoneTextField.text = @"";
        IDTextField.text = @"";
        }else{
            [self.navigationController popViewControllerAnimated:YES];
        }
    }
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    [nameTextField resignFirstResponder];
    [phoneTextField resignFirstResponder];
    [IDTextField resignFirstResponder];
}//讓鍵盤隱藏

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:YES];
}

- (void)viewDidUnload
{
    [super viewDidUnload];

    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}

- (void)dealloc {
    [nameTextField release];
    [phoneTextField release];
    [IDTextField release];

    [textFieldArray release];
    [super dealloc];
}

-(void)viewWillDisappear:(BOOL)animated//頁面將要消失的時候執行，將UITextField清空
{
    [super viewWillDisappear:YES];
    nameTextField.text = nil;
    phoneTextField.text = nil;
    IDTextField.text = nil;
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

@end

下面是SearchInfo.h文件,一定要注意這個類是繼承UITableViewController，不是UIViewController！！！

//
//  SearchInfo.h
//  tabbartest
//
//  Created by changjian on 12-12-8.
//  Copyright (c) 2012年 __MyCompanyName__. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface SearchInfo : UITableViewController<UISearchDisplayDelegate,UITableViewDelegate,UITableViewDataSource,UISearchBarDelegate>
{
    UISearchDisplayController *searchController;
    NSString *namestr;
    NSString *phonestr;
    NSString *IDstr;
}
@property (retain,nonatomic)NSString *dbpath;
@property (retain,nonatomic)NSMutableArray *searchResults;//用於保存搜索出姓名的結果
@property (retain,nonatomic)NSMutableArray *searchPhoneResults;//用來保存搜索的電話信息
@property (retain,nonatomic)NSMutableArray *searchIDResult;//用來保存搜索的ID信息
@property (retain,nonatomic)NSMutableArray *nameArray;//保存搜索之前的姓名信息
@property (retain,nonatomic)NSMutableArray *phoneArray;//保存搜索之前的電話信息
@property (retain,nonatomic)NSMutableArray *IDArray;//保存搜索之前的ID信息
@property (nonatomic,assign)BOOL searchWasActive;
@property (nonatomic,assign)NSString *savedSearchTerm;//這個好像沒用了
@property (nonatomic,retain)NSString *namestr;
@property (nonatomic,retain)NSString*phonestr;
@property (nonatomic,retain)NSString*IDstr;

- (void)getAllDatabase;
@end

SearchInfo.m文件

//
//  SearchInfo.m
//  tabbartest
//
//  Created by changjian on 12-12-8.
//  Copyright (c) 2012年 __MyCompanyName__. All rights reserved.
//

#import "SearchInfo.h"
#import "FMDatabase.h"
#import "ViewController.h"
#import "UserDetailInfo.h"

@implementation SearchInfo
@synthesize dbpath;
@synthesize searchResults,searchPhoneResults,searchIDResult;
@synthesize nameArray,phoneArray,IDArray;
@synthesize searchWasActive;
@synthesize savedSearchTerm;
@synthesize namestr,phonestr,IDstr;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)didReceiveMemoryWarning
{
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];
    
    // Release any cached data, images, etc that aren't in use.
}

#pragma mark - View lifecycle

- (void)viewDidLoad
{
    [super viewDidLoad];
//搜索比較復雜，既要初始化UISearchBar，又要初始化UISearchDisplayController，然后還要寫UITableViewDelegate里的-(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath和-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section方法，還要設置一大堆代理，慢慢往下看
    UISearchBar *search = [[[UISearchBar alloc]initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width -50, 44)]autorelease];
    search.placeholder = @"請輸入姓名";
    search.autocorrectionType = UITextAutocorrectionTypeNo;//不自動糾錯，貌似沒啥用
    search.autocapitalizationType = UITextAutocapitalizationTypeAllCharacters;//所有字母大寫 ，也沒啥用
    
    search.showsScopeBar = YES;
    search.delegate = self;//UISearchBar設置代理
    search.keyboardType = UIKeyboardTypeNamePhonePad;
    self.tableView.tableHeaderView = search;
    self.tableView.dataSource = self;

    searchController = [[UISearchDisplayController alloc]initWithSearchBar:search contentsController:self];
    searchController.active = NO;
    
    searchController.delegate = self;//UISearchDisplayController設置代理
    
    searchController.searchResultsDelegate=self;//還是代理
    
    searchController.searchResultsDataSource = self;//有完沒完
    [search release];
    NSString *document = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0];
    NSString *path = [document stringByAppendingPathComponent:@"user.sqlite"];
    NSLog(@"path==%@",path);
    self.dbpath = path;
    self.tableView.delegate = self;//tableView的代理，為什么這么寫，因為這個類是繼承UITableView的，要注意！不是繼承UIViewController的！
    self.tableView.dataSource = self;
    nameArray = [[NSMutableArray alloc]initWithCapacity:0];
    phoneArray = [[NSMutableArray alloc]initWithCapacity:0];
    IDArray= [[NSMutableArray alloc]initWithCapacity:0];
    
    [self getAllDatabase];
    [self.tableView reloadData];

    // Do any additional setup after loading the view from its nib.
}

- (void)viewWillAppear:(BOOL)animated
{
    self.searchWasActive = [self.searchDisplayController isActive];
    if (self.searchDisplayController.searchBar != 0)
    {
        self.searchDisplayController.searchBar.text = nil;
        [self.searchDisplayController.searchBar resignFirstResponder];
        [self.searchDisplayController setActive:NO];//在進入搜索頁面之前將其設置為不活動，大家可以試試改成活動看看是什么樣
    }
}

- (void)getAllDatabase//要重新獲取數據庫信息，因為執行完刪除之后數據庫變了
{
    FMDatabase *db = [FMDatabase databaseWithPath:self.dbpath];
    if ([db open]) {
        NSString *sql = @"SELECT * FROM USER";
        FMResultSet *rs = [db executeQuery:sql];
        while ([rs next]) {
            NSString *name = [rs stringForColumn:@"name"];
            NSString *phone = [rs stringForColumn:@"phone"];
            NSString *ID = [rs stringForColumn:@"idcode"];
            
            [self.nameArray addObject:name];
            [self.phoneArray addObject:phone];
            [self.IDArray addObject:ID];
        }
        self.searchResults = [[NSMutableArray alloc]initWithArray:nameArray copyItems:YES];
        self.searchPhoneResults = [[NSMutableArray alloc]initWithArray:phoneArray copyItems:YES];
        self.searchIDResult = [[NSMutableArray alloc]initWithArray:IDArray copyItems:YES];
        NSLog(@"search from nameArray==%@",self.nameArray);
        [db close];
    }
}


#pragma mark -tableview-

-(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
//    self.tableView = tableView;
    static NSString *cellIdentifier = @"cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
    }
    cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
    if ([tableView isEqual:self.searchDisplayController.searchResultsTableView]) {
        cell.textLabel.text = [searchResults objectAtIndex:indexPath.row];
//        cell.detailTextLabel.text = [NSString stringWithFormat:@"電話：%@",[searchResults objectAtIndex:indexPath.row]];//不知道為什么不顯示cell.detailTextLabel.text ，有人知道的話告訴我一下
    }else{
        cell.textLabel.text = [self.nameArray objectAtIndex:indexPath.row];
    }
    return cell;
}

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    NSInteger row = 0;
    if ([tableView isEqual:self.searchDisplayController.searchResultsTableView]) {//記住這個格式，如果當前的table就是用於顯示所搜信息的table的話。因為UISearchDisplayController這貨自帶一個table
        row = [self.searchResults count];
    }else{
        [self.nameArray count];
    }
    return row;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    UserDetailInfo *detailInfo = [[UserDetailInfo alloc]init];
    detailInfo.nameStr = [self.searchResults objectAtIndex:indexPath.row];
    detailInfo.phoneStr = [self.searchPhoneResults objectAtIndex:indexPath.row];
    detailInfo.IDsStr = [self.searchIDResult objectAtIndex:indexPath.row];
    NSLog(@"self.namestr==%@",self.namestr);

    NSArray *array = [self.navigationController viewControllers];//先獲取視圖控制器數組
    UINavigationController *nav = [array objectAtIndex:[array count] - 1];//獲取當前的導航試圖控制器
    [nav.navigationController pushViewController:detailInfo animated:YES];//跳轉到刪除頁面
    [detailInfo release];
}


#pragma mark -UISearchControllerDisplay-//設置搜索范圍
//下面注意了，下面的方法是實現搜索功能的，后面兩個長得很像的方法是UISearchControllerDisplay代理里的方法，我也搞不懂是干什么用的，他們的格式很固定，大家記住就行了。

- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope
{
    [self searchBarSearchButtonClicked:self.searchDisplayController.searchBar];
    
}

- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar//從數據庫搜索
{
    FMDatabase *db = [FMDatabase databaseWithPath:self.dbpath];
    if ([db open]) {

        [searchResults removeAllObjects];
        [searchPhoneResults removeAllObjects];
        [searchIDResult removeAllObjects];
        NSString *sql = @"SELECT * FROM USER WHERE name like ?";
        FMResultSet *rs = [db executeQuery:sql,searchBar.text];
        while ([rs next]) {
            self.namestr = [rs stringForColumn:@"name"];
            self.phonestr = [rs stringForColumn:@"phone"];
            self.IDstr = [rs stringForColumn:@"idcode"];

            [self.searchResults addObject:namestr];
            [self.searchPhoneResults addObject:phonestr];
            [self.searchIDResult addObject:IDstr];
        }

        NSLog(@"searchResults == %@",searchResults);
        NSLog(@"searchPhoneResults==%@",searchPhoneResults);
        NSLog(@"searchIDResult==%@",searchIDResult);
        NSLog(@"search===%@",searchBar.text);

    }
    [db close];

}

#pragma mark -
#pragma mark UISearchDisplayController Delegate Methods設置代理方法

- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
{
    [self filterContentForSearchText:searchString scope:
     [[self.searchDisplayController.searchBar scopeButtonTitles] objectAtIndex:[self.searchDisplayController.searchBar selectedScopeButtonIndex]]];
    
    // Return YES to cause the search result table view to be reloaded.
    return YES;
}


- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchScope:(NSInteger)searchOption
{
    [self filterContentForSearchText:[self.searchDisplayController.searchBar text] scope:
     [[self.searchDisplayController.searchBar scopeButtonTitles] objectAtIndex:searchOption]];
    
    // Return YES to cause the search result table view to be reloaded.
    return YES;
}



- (void)viewDidUnload
{
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
- (void)dealloc {
    [nameArray release];
    [phoneArray release];
    [IDArray release];
    [searchController release];
    [searchResults release];
    [searchPhoneResults release];
    [searchIDResult release];

    [super dealloc];
}

@end

最難的部分完了，接下來就簡單多了！

最后是刪除信息界面UserDetailInfo.h

@interface UserDetailInfo : UIViewController<UIAlertViewDelegate>
{

}

@property(retain,nonatomic)NSString *dbpath;
@property(retain,nonatomic)NSString *nameStr;
@property(retain,nonatomic)NSString *phoneStr;
@property(retain,nonatomic)NSString *IDsStr;

@end

UserDetailInfo.m

//
//  UserDetailInfo.m
//  tabbartest
//
//  Created by changjian on 12-12-10.
//  Copyright (c) 2012年 __MyCompanyName__. All rights reserved.
//

#import "UserDetailInfo.h"
#import "FMDatabase.h"


@implementation UserDetailInfo
@synthesize dbpath;
@synthesize nameStr,phoneStr,IDsStr;


- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)didReceiveMemoryWarning
{
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];
    
    // Release any cached data, images, etc that aren't in use.
}

#pragma mark - View lifecycle

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.title = @"詳細信息";
    NSArray *array = [NSArray arrayWithObjects:@"姓名:",@"電話:",@"ID:", nil];
    NSArray *array2 = [NSArray arrayWithObjects:self.nameStr,self.phoneStr,self.IDsStr, nil];
    
    for (int i = 0; i < 3 ; i++)
    {
        UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake( 70,i * 40 + 34, 100, 30)];
        label.text = [array objectAtIndex:i];
        [self.view addSubview:label];
        
        UILabel *label2 = [[UILabel alloc]initWithFrame:CGRectMake(140, i * 40 +35, 100, 30)];
        label2.text = [array2 objectAtIndex:i];
        [self.view addSubview:label2];
        [label release];
        [label2 release];
    }
    NSString *document = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0];
    NSString *path = [document stringByAppendingPathComponent:@"USER.sqlite"];
    self.dbpath = path;
    
    UIBarButtonItem *deleteButton = [[UIBarButtonItem alloc]initWithTitle:@"刪除" style:UIBarButtonItemStyleDone target:self action:@selector(deleteFromDatabase)];
    self.navigationItem.rightBarButtonItem = deleteButton;
    
}

- (void)deleteFromDatabase//從數據庫刪除信息
{
    FMDatabase *db = [FMDatabase databaseWithPath:self.dbpath];
    NSString *mes = nil;
    if ([db open]) {
        NSString *sql = @"DELETE FROM USER WHERE name = ? and phone = ? and idcode = ?";
        if (self.nameStr.length != 0&&self.phoneStr.length != 0&&self.IDsStr.length !=0){
        BOOL rs = [db executeUpdate:sql,self.nameStr,self.phoneStr,self.IDsStr]; //后面跟的三個參數就是sql語句里的三個問號對應
            if (rs) {
                mes = @"刪除成功";
            }else{
                mes = @"刪除失敗";
            }
        }
    }
    UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"提示" message:mes delegate:nil cancelButtonTitle:@"確定" otherButtonTitles:nil, nil];
    alert.delegate = self;//別忘了代理
    [alert show];
    [alert release];
    [db close];
}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    if ( buttonIndex == 0) {
        
        [self.navigationController popViewControllerAnimated:YES];
        NSLog(@"點擊了刪除成功");
    }
}

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:YES];
    
}

- (void)viewDidUnload
{
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

@end

完全的代碼流，把代碼復制過去就直接能用，不過建議大家在復制之前一定要搞清楚寫法，最好自己再寫一遍，不然復制了下次還是不會。有什么問題記得給我留言。