ios Sqlite数据库增删改查基本操作
研究了几天的数据库，终于把它给搞出来了。Sqlite是ios上最常用的数据库之一，大家还是有必要了解一下的。这是仿照网上的一个例子做的，有些部分写的不好，我稍作了修改，以讲解为主，主要让大家能够明白如何修改，明白原理，达到举一反三的目的。
先来看看效果图
先来看看数据库方法类，将各个操作都封装在一个类里面，达到代码重用的目的，这是程序员都应该努力去实现的目标，这样在下一次用到同样的方法和类的时候，就可以直接使用封装好的类，可以节约大量的时间。
先来看看.h文件
#import <Foundation/Foundation.h> #import <sqlite3.h> #define kFilename @"testdb.db" @class sqlTestList; @interface sqlService : NSObject { sqlite3 *_database; } @property (nonatomic) sqlite3 *_database; -(BOOL) createTestList:(sqlite3 *)db;//创建数据库 -(BOOL) insertTestList:(sqlTestList *)insertList;//插入数据 -(BOOL) updateTestList:(sqlTestList *)updateList;//更新数据 -(NSMutableArray*)getTestList;//获取全部数据 - (BOOL) deleteTestList:(sqlTestList *)deletList;//删除数据： - (NSMutableArray*)searchTestList:(NSString*)searchString;//查询数据库，searchID为要查询数据的ID，返回数据为查询到的数据 @end @interface sqlTestList : NSObject//重新定义了一个类，专门用于存储数据 { int sqlID; NSString *sqlText; NSString *sqlname; } @property (nonatomic) int sqlID; @property (nonatomic, retain) NSString *sqlText; @property (nonatomic, retain) NSString *sqlname; @end
再来看看.m文件
// // sqlService.m // SQLite3Test // // Created by fengxiao on 11-11-28. // Copyright 2011 __MyCompanyName__. All rights reserved. // #import "sqlService.h" @implementation sqlService @synthesize _database; - (id)init { return self; } - (void)dealloc { [super dealloc]; } //获取document目录并返回数据库目录 - (NSString *)dataFilePath{ NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSLog(@"=======%@",documentsDirectory); return [documentsDirectory stringByAppendingPathComponent:@"data.db"];//这里很神奇，可以定义成任何类型的文件，也可以不定义成.db文件，任何格式都行，定义成.sb文件都行，达到了很好的数据隐秘性 } //创建，打开数据库 - (BOOL)openDB { //获取数据库路径 NSString *path = [self dataFilePath]; //文件管理器 NSFileManager *fileManager = [NSFileManager defaultManager]; //判断数据库是否存在 BOOL find = [fileManager fileExistsAtPath:path]; //如果数据库存在，则用sqlite3_open直接打开（不要担心，如果数据库不存在sqlite3_open会自动创建） if (find) { NSLog(@"Database file have already existed."); //打开数据库，这里的[path UTF8String]是将NSString转换为C字符串，因为SQLite3是采用可移植的C(而不是 //Objective-C)编写的，它不知道什么是NSString. if(sqlite3_open([path UTF8String], &_database) != SQLITE_OK) { //如果打开数据库失败则关闭数据库 sqlite3_close(self._database); NSLog(@"Error: open database file."); return NO; } //创建一个新表 [self createTestList:self._database]; return YES; } //如果发现数据库不存在则利用sqlite3_open创建数据库（上面已经提到过），与上面相同，路径要转换为C字符串 if(sqlite3_open([path UTF8String], &_database) == SQLITE_OK) { //创建一个新表 [self createTestList:self._database]; return YES; } else { //如果创建并打开数据库失败则关闭数据库 sqlite3_close(self._database); NSLog(@"Error: open database file."); return NO; } return NO; } //创建表 - (BOOL) createTestList:(sqlite3*)db { //这句是大家熟悉的SQL语句 char *sql = "create table if not exists testTable(ID INTEGER PRIMARY KEY AUTOINCREMENT, testID int,testValue text,testName text)";// testID是列名，int 是数据类型，testValue是列名，text是数据类型，是字符串类型 sqlite3_stmt *statement; //sqlite3_prepare_v2 接口把一条SQL语句解析到statement结构里去. 使用该接口访问数据库是当前比较好的的一种方法 NSInteger sqlReturn = sqlite3_prepare_v2(_database, sql, -1, &statement, nil); //第一个参数跟前面一样，是个sqlite3 * 类型变量， //第二个参数是一个 sql 语句。 //第三个参数我写的是-1，这个参数含义是前面 sql 语句的长度。如果小于0，sqlite会自动计算它的长度（把sql语句当成以\0结尾的字符串）。 //第四个参数是sqlite3_stmt 的指针的指针。解析以后的sql语句就放在这个结构里。 //第五个参数是错误信息提示，一般不用,为nil就可以了。 //如果这个函数执行成功（返回值是 SQLITE_OK 且 statement 不为NULL ），那么下面就可以开始插入二进制数据。 //如果SQL语句解析出错的话程序返回 if(sqlReturn != SQLITE_OK) { NSLog(@"Error: failed to prepare statement:create test table"); return NO; } //执行SQL语句 int success = sqlite3_step(statement); //释放sqlite3_stmt sqlite3_finalize(statement); //执行SQL语句失败 if ( success != SQLITE_DONE) { NSLog(@"Error: failed to dehydrate:create table test"); return NO; } NSLog(@"Create table 'testTable' successed."); return YES; } //插入数据 -(BOOL) insertTestList:(sqlTestList *)insertList { //先判断数据库是否打开 if ([self openDB]) { sqlite3_stmt *statement; //这个 sql 语句特别之处在于 values 里面有个? 号。在sqlite3_prepare函数里，?号表示一个未定的值，它的值等下才插入。 static char *sql = "INSERT INTO testTable(testID, testValue,testName) VALUES(?, ?, ?)"; int success2 = sqlite3_prepare_v2(_database, sql, -1, &statement, NULL); if (success2 != SQLITE_OK) { NSLog(@"Error: failed to insert:testTable"); sqlite3_close(_database); return NO; } //这里的数字1，2，3代表上面的第几个问号，这里将三个值绑定到三个绑定变量 sqlite3_bind_int(statement, 1, insertList.sqlID); sqlite3_bind_text(statement, 2, [insertList.sqlText UTF8String], -1, SQLITE_TRANSIENT); sqlite3_bind_text(statement, 3, [insertList.sqlname UTF8String], -1, SQLITE_TRANSIENT); //执行插入语句 success2 = sqlite3_step(statement); //释放statement sqlite3_finalize(statement); //如果插入失败 if (success2 == SQLITE_ERROR) { NSLog(@"Error: failed to insert into the database with message."); //关闭数据库 sqlite3_close(_database); return NO; } //关闭数据库 sqlite3_close(_database); return YES; } return NO; } //获取数据 - (NSMutableArray*)getTestList{ NSMutableArray *array = [NSMutableArray arrayWithCapacity:10]; //判断数据库是否打开 if ([self openDB]) { sqlite3_stmt *statement = nil; //sql语句 char *sql = "SELECT testID, testValue ,testName FROM testTable";//从testTable这个表中获取 testID, testValue ,testName，若获取全部的话可以用*代替testID, testValue ,testName。 if (sqlite3_prepare_v2(_database, sql, -1, &statement, NULL) != SQLITE_OK) { NSLog(@"Error: failed to prepare statement with message:get testValue."); return NO; } else { //查询结果集中一条一条的遍历所有的记录，这里的数字对应的是列值,注意这里的列值，跟上面sqlite3_bind_text绑定的列值不一样！一定要分开，不然会crash，只有这一处的列号不同，注意！ while (sqlite3_step(statement) == SQLITE_ROW) { sqlTestList* sqlList = [[sqlTestList alloc] init] ; sqlList.sqlID = sqlite3_column_int(statement,0); char* strText = (char*)sqlite3_column_text(statement, 1); sqlList.sqlText = [NSString stringWithUTF8String:strText]; char *strName = (char*)sqlite3_column_text(statement, 2); sqlList.sqlname = [NSString stringWithUTF8String:strName]; [array addObject:sqlList]; [sqlList release]; } } sqlite3_finalize(statement); sqlite3_close(_database); } return [array retain];//定义了自动释放的NSArray，这样不是个好办法，会造成内存泄露，建议大家定义局部的数组，再赋给属性变量。 } //更新数据 -(BOOL) updateTestList:(sqlTestList *)updateList{ if ([self openDB]) { sqlite3_stmt *statement;//这相当一个容器，放转化OK的sql语句 //组织SQL语句 char *sql = "update testTable set testValue = ? and testName = ? WHERE testID = ?"; //将SQL语句放入sqlite3_stmt中 int success = sqlite3_prepare_v2(_database, sql, -1, &statement, NULL); if (success != SQLITE_OK) { NSLog(@"Error: failed to update:testTable"); sqlite3_close(_database); return NO; } //这里的数字1，2，3代表第几个问号。这里只有1个问号，这是一个相对比较简单的数据库操作，真正的项目中会远远比这个复杂 //绑定text类型的数据库数据 sqlite3_bind_text(statement, 3, [updateList.sqlname UTF8String], -1, SQLITE_TRANSIENT); sqlite3_bind_text(statement, 2, [updateList.sqlText UTF8String], -1, SQLITE_TRANSIENT); sqlite3_bind_int(statement, 1, updateList.sqlID); //执行SQL语句。这里是更新数据库 success = sqlite3_step(statement); //释放statement sqlite3_finalize(statement); //如果执行失败 if (success == SQLITE_ERROR) { NSLog(@"Error: failed to update the database with message."); //关闭数据库 sqlite3_close(_database); return NO; } //执行成功后依然要关闭数据库 sqlite3_close(_database); return YES; } return NO; } //删除数据 - (BOOL) deleteTestList:(sqlTestList *)deletList{ if ([self openDB]) { sqlite3_stmt *statement; //组织SQL语句 static char *sql = "delete from testTable where testID = ? and testValue = ? and testName = ?"; //将SQL语句放入sqlite3_stmt中 int success = sqlite3_prepare_v2(_database, sql, -1, &statement, NULL); if (success != SQLITE_OK) { NSLog(@"Error: failed to delete:testTable"); sqlite3_close(_database); return NO; } //这里的数字1，2，3代表第几个问号。这里只有1个问号，这是一个相对比较简单的数据库操作，真正的项目中会远远比这个复杂 sqlite3_bind_int(statement, 1, deletList.sqlID); sqlite3_bind_text(statement, 2, [deletList.sqlText UTF8String], -1, SQLITE_TRANSIENT); sqlite3_bind_text(statement, 3, [deletList.sqlname UTF8String], -1, SQLITE_TRANSIENT); //执行SQL语句。这里是更新数据库 success = sqlite3_step(statement); //释放statement sqlite3_finalize(statement); //如果执行失败 if (success == SQLITE_ERROR) { NSLog(@"Error: failed to delete the database with message."); //关闭数据库 sqlite3_close(_database); return NO; } //执行成功后依然要关闭数据库 sqlite3_close(_database); return YES; } return NO; } //查询数据 - (NSMutableArray*)searchTestList:(NSString*)searchString{ NSMutableArray *array = [NSMutableArray arrayWithCapacity:10]; //判断数据库是否打开 if ([self openDB]) { sqlite3_stmt *statement = nil; //sql语句 NSString *querySQL = [NSString stringWithFormat:@"SELECT * from testTable where testName like \"%@\"",searchString]; const char *sql = [querySQL UTF8String]; // char *sql = "SELECT * FROM testTable WHERE testName like ?";//这里用like代替=可以执行模糊查找，原来是"SELECT * FROM testTable WHERE testName = ?" if (sqlite3_prepare_v2(_database, sql, -1, &statement, NULL) != SQLITE_OK) { NSLog(@"Error: failed to prepare statement with message:search testValue."); return NO; } else { sqlTestList *searchList = [[sqlTestList alloc]init]; // sqlite3_bind_int(statement, 1, searchID); sqlite3_bind_text(statement, 3, [searchString UTF8String], -1, SQLITE_TRANSIENT); //查询结果集中一条一条的遍历所有的记录，这里的数字对应的是列值。 while (sqlite3_step(statement) == SQLITE_ROW) { sqlTestList* sqlList = [[sqlTestList alloc] init] ; sqlList.sqlID = sqlite3_column_int(statement,1); char* strText = (char*)sqlite3_column_text(statement, 2); sqlList.sqlText = [NSString stringWithUTF8String:strText]; char *strName = (char*)sqlite3_column_text(statement, 3); sqlList.sqlname = [NSString stringWithUTF8String:strName]; [array addObject:sqlList]; [sqlList release]; } [searchList release]; } sqlite3_finalize(statement); sqlite3_close(_database); } return [array retain]; } @end @implementation sqlTestList//刚才.h文件里定义的类在这实现 @synthesize sqlID; @synthesize sqlText; @synthesize sqlname; -(id) init { sqlID = 0; sqlText = @""; sqlname = @""; return self; }; -(void) dealloc { if ((sqlText != nil) && (sqlname != nil)) { [sqlText release]; [sqlname release]; } [super dealloc]; } @end
这就是封装好的类，可以重用哦！
下面是添加数据页面
这也是一个类，来看.h文件
#import <UIKit/UIKit.h> #import "sqlService.h" @interface operateSqlViewController : UIViewController { UITextField *idValue; UITextField *textValue; UITextField *textName; int oprateType;//区分数据插入与更新 sqlTestList *sqlValue; } @property (nonatomic, retain) IBOutlet UITextField *idValue; @property (nonatomic, retain) IBOutlet UITextField *textValue; @property (nonatomic, retain) IBOutlet UITextField *textName; @property (nonatomic, retain) sqlTestList *sqlValue; @property (nonatomic) int oprateType; @end
再来看看.m文件
#import "operateSqlViewController.h" @implementation operateSqlViewController @synthesize idValue; @synthesize textValue; @synthesize oprateType; @synthesize sqlValue; @synthesize textName; - (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. } - (void)viewDidLoad{ UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:@"返回" style:UIBarButtonItemStyleBordered target:self action:@selector(dismiss:)]; UIBarButtonItem *saveButton = [[UIBarButtonItem alloc] initWithTitle:@"保存" style:UIBarButtonItemStyleBordered target:self action:@selector(saveValue:)]; [[self navigationItem] setLeftBarButtonItem:backButton]; [[self navigationItem] setRightBarButtonItem:saveButton]; [backButton release]; [saveButton release]; if (oprateType == 0) { [self.navigationItem setTitle:@"数据插入"]; } else if(oprateType == 1){ [self.navigationItem setTitle:@"数据更新"]; idValue.text = [NSString stringWithFormat:@"%d", sqlValue.sqlID]; textValue.text = sqlValue.sqlText; textName.text = sqlValue.sqlname; } } - (void)viewDidUnload { idValue = nil; textValue = nil; textName = nil; sqlValue = nil; [super viewDidUnload]; // Release any retained subviews of the main view. // e.g. self.myOutlet = nil; } - (void)dealloc { [idValue release]; [textValue release]; [sqlValue release]; [textName release]; [super dealloc]; } - (void)dismiss:(id)sender{ [[self parentViewController] dismissModalViewControllerAnimated:YES]; } - (void)saveValue:(id)sender{ if (idValue.text.length == 0) { UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"请输入ID" delegate:self cancelButtonTitle:@"好" otherButtonTitles:nil]; [alert show]; [alert release]; return; } if (textValue.text.length == 0) { UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"请输入电话" delegate:self cancelButtonTitle:@"好" otherButtonTitles:nil]; [alert show]; [alert release]; return; } if (textName.text.length == 0) { UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"请输入姓名" delegate:self cancelButtonTitle:@"好" otherButtonTitles:nil]; [alert show]; [alert release]; return; } //初始化数据库 sqlService *sqlSer = [[sqlService alloc] init]; //数据库插入 if (oprateType == 0) { sqlTestList *sqlInsert = [[sqlTestList alloc]init]; sqlInsert.sqlID = [idValue.text intValue]; sqlInsert.sqlText = textValue.text; sqlInsert.sqlname = textName.text; //调用封装好的数据库插入函数 if ([sqlSer insertTestList:sqlInsert]) { UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"插入数据成功" delegate:self cancelButtonTitle:@"好" otherButtonTitles:nil]; [alert show]; [alert release]; } else { UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"插入数据失败" delegate:self cancelButtonTitle:@"好" otherButtonTitles:nil]; [alert show]; [alert release]; } [sqlInsert release]; } //数据库更新 if(oprateType == 1){ sqlTestList *newValue = [[sqlTestList alloc]init]; newValue.sqlID = [idValue.text intValue]; newValue.sqlText = textValue.text; newValue.sqlname = textName.text; //调用封装好的更新数据库函数 if ([sqlSer updateTestList:newValue]) { UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"更新数据成功" delegate:self cancelButtonTitle:@"好" otherButtonTitles:nil]; [alert show]; [alert release]; } else { UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"更新数据失败" delegate:self cancelButtonTitle:@"好" otherButtonTitles:nil]; [alert show]; [alert release]; } [newValue release]; } } @end
代码写的有些啰嗦，不过不难容易看懂，不多解释了，要在xib文件中添加3个UITextField和ULabel，要记得连线。
在主界面的.h文件
#import <UIKit/UIKit.h> #import "sqlService.h" @interface SQLite3TestViewController : UIViewController<UITableViewDelegate,UITableViewDataSource> { UITableView *utableView; NSArray *listData; UISearchBar *searchBar;//搜索栏 } @property (nonatomic, retain) IBOutlet UITableView *utableView; @property (nonatomic, retain) IBOutlet UISearchBar *searchBar; @property (nonatomic, retain) NSArray *listData; - (IBAction)insertValue; - (IBAction)updateValue; - (IBAction)getAllValue; - (IBAction)deleteValue; - (IBAction)searchValue; @end
.m文件
// // SQLite3TestViewController.m // SQLite3Test // // Created by fengxiao on 11-11-28. // Copyright 2011 __MyCompanyName__. All rights reserved. // #import "SQLite3TestViewController.h" #import "operateSqlViewController.h" @implementation SQLite3TestViewController @synthesize utableView; @synthesize listData; @synthesize searchBar; - (void)viewDidLoad{ sqlService *sqlSer = [[sqlService alloc] init]; listData = [sqlSer getTestList];//先初始化那个专门用于存数据的类，才调用类获取数据的方法 } - (void)viewDidAppear:(BOOL)animated{//在这里写是为了等待时间缩短一点，数据如果很多的，在这里写可以让数据提前加载 sqlService *sqlSer = [[sqlService alloc] init]; listData = [sqlSer getTestList]; [sqlSer release]; [utableView reloadData]; } - (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. } - (void)viewDidUnload { utableView = nil; listData = nil; searchBar = nil; [super viewDidUnload]; // Release any retained subviews of the main view. // e.g. self.myOutlet = nil; } - (void)dealloc { [utableView release]; [listData release]; [searchBar release]; [super dealloc]; } - (IBAction)insertValue{ [searchBar resignFirstResponder];//触发这个insertValue方法时隐藏键盘 operateSqlViewController *operateController = [[operateSqlViewController alloc] init ]; UINavigationController *theNavController = [[UINavigationController alloc] initWithRootViewController:operateController];//这里如果不初始化一个UINavigationController类的对象来存放operateSqlViewController类的UIViewController，就不会有最上面的导航栏了。 operateController.oprateType = 0;//optrateType为0时为数据插入 [operateController release]; theNavController.navigationBar.tintColor = [UIColor blackColor]; [self presentModalViewController:theNavController animated:YES]; [theNavController release]; } - (IBAction)updateValue{ [searchBar resignFirstResponder]; NSIndexPath *indexPath = [utableView indexPathForSelectedRow]; if (indexPath == nil) { UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"请选择要更新的项" delegate:self cancelButtonTitle:@"好" otherButtonTitles:nil]; [alert show]; [alert release]; return; } NSUInteger row = [indexPath row]; sqlTestList *sqlList = [[sqlTestList alloc]init]; sqlList = [listData objectAtIndex:(row - 1)];//在这里面获取点击的行，因为table的第一行没显示数据，所以这里要减1。 operateSqlViewController *operateController = [[operateSqlViewController alloc] init ]; UINavigationController *theNavController = [[UINavigationController alloc] initWithRootViewController:operateController]; operateController.oprateType = 1;//optrateType为1时为数据更新 operateController.sqlValue = sqlList; theNavController.navigationBar.tintColor = [UIColor blackColor]; [self presentModalViewController:theNavController animated:YES]; [sqlList release]; [operateController release]; [theNavController release]; } - (IBAction)getAllValue{ [searchBar resignFirstResponder]; sqlService *sqlSer = [[sqlService alloc] init]; listData = [sqlSer getTestList]; [utableView reloadData]; [sqlSer release]; } - (IBAction)deleteValue{ [searchBar resignFirstResponder]; NSIndexPath *indexPath = [utableView indexPathForSelectedRow]; if (indexPath == nil) { UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"请选择要删除的项" delegate:self cancelButtonTitle:@"好" otherButtonTitles:nil]; [alert show]; [alert release]; return; } NSUInteger row = [indexPath row]; sqlTestList *sqlList = [[sqlTestList alloc]init]; sqlList = [listData objectAtIndex:(row - 1)]; sqlService *sqlSer = [[sqlService alloc] init]; if ([sqlSer deleteTestList:sqlList]) { UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"删除数据成功" delegate:self cancelButtonTitle:@"好" otherButtonTitles:nil]; [alert show]; [alert release]; //删除成功后重新获取数据更新列表 listData = [sqlSer getTestList]; [utableView reloadData]; } else { UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"删除数据失败" delegate:self cancelButtonTitle:@"好" otherButtonTitles:nil]; [alert show]; [alert release]; return; } [sqlList release]; [sqlSer release]; } - (IBAction)searchValue{ if ([searchBar.text isEqualToString:@""]) { UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"请输入要查询数据的ID" delegate:self cancelButtonTitle:@"好" otherButtonTitles:nil]; [alert show]; [alert release]; return; } else { // int idNum = [searchBar.text intValue]; NSString *str = searchBar.text; sqlService *sqlSer = [[sqlService alloc] init]; listData = [sqlSer searchTestList:str]; if ([listData count] == 0) { UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"sorry,未查询到数据，请查看name是否有误" delegate:self cancelButtonTitle:@"好" otherButtonTitles:nil]; [alert show]; [alert release]; return; } [searchBar resignFirstResponder]; [utableView reloadData]; [sqlSer release]; } } #pragma mark - #pragma mark Table View Data Source Methods - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { // Return the number of rows in the section. return [listData count] + 1;//从第二行开始，第一行不显示数据 } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { NSString *CustomIdentifier = [NSString stringWithFormat:@"cell%d",indexPath.row]; //cell不重用 UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CustomIdentifier]; if (indexPath.row == 0) cell.selectionStyle = UITableViewCellSelectionStyleNone; if ( cell == nil ) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:CustomIdentifier] autorelease]; cell.backgroundColor = [UIColor clearColor]; } if (indexPath.row > 0) { NSUInteger row = [indexPath row]; sqlTestList *sqlList = [[sqlTestList alloc] init] ; if (listData != nil) sqlList = [listData objectAtIndex: (row - 1)];//读取数据的时候也要减一行，从第二行开始 UILabel *nameLabel = [[UILabel alloc]initWithFrame:CGRectMake(0+40, 10, 70, 30)]; UILabel *IDLabel = [[UILabel alloc]initWithFrame:CGRectMake(90+40, 10, 70, 30)]; UILabel *valueLabel = [[UILabel alloc]initWithFrame:CGRectMake(180+40, 10, 70, 30)]; nameLabel.text = sqlList.sqlname; IDLabel.text = sqlList.sqlText; valueLabel.text = [NSString stringWithFormat:@"%d",sqlList.sqlID]; [cell.contentView addSubview:nameLabel]; [cell.contentView addSubview:IDLabel]; [cell.contentView addSubview:valueLabel]; [nameLabel release]; [IDLabel release]; [valueLabel 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",@"ID",@"电话", nil]; label.text = [array objectAtIndex:i]; label.backgroundColor = [UIColor clearColor]; [cell.contentView addSubview:label]; [label release]; } } return cell; } - (NSIndexPath*)tableView:(UITableView *)tableView willSelectRowAtIndexPath:(NSIndexPath *)indexPath { [searchBar resignFirstResponder]; if (indexPath.row == 0) { return nil;//让第一行不能点击 } else return indexPath; } @end
好了，这就是全部了，希望大家尽量封装自己写的类，现在写得多，以后会很轻松。
有什么问题请给我留言。
