2019獨角獸企業重金招聘Python工程師標準>>>

　　研究了幾天的數據庫，終于把它給搞出來了。Sqlite是ios上最常用的數據庫之一，大家還是有必要了解一下的。這是仿照網上的一個例子做的，有些部分寫的不好，我稍作了修改，以講解為主，主要讓大家能夠明白如何修改，明白原理，達到舉一反三的目的。

先來看看效果圖

　　先來看看數據庫方法類，將各個操作都封裝在一個類里面，達到代碼重用的目的，這是程序員都應該努力去實現的目標，這樣在下一次用到同樣的方法和類的時候，就可以直接使用封裝好的類，可以節約大量的時間。

先來看看.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;//創建數據庫 -(BOOL)?insertTestList:(sqlTestList?*)insertList;//插入數據?????????????????????????????????????-(BOOL)?updateTestList:(sqlTestList?*)updateList;//更新數據 -(NSMutableArray*)getTestList;//獲取全部數據 -?(BOOL)?deleteTestList:(sqlTestList?*)deletList;//刪除數據： -?(NSMutableArray*)searchTestList:(NSString*)searchString;//查詢數據庫，searchID為要查詢數據的ID，返回數據為查詢到的數據 @end @interface?sqlTestList?:?NSObject//重新定義了一個類，專門用于存儲數據 {????int?sqlID;NSString?*sqlText;NSString?*sqlname; }@property?(nonatomic)?int?sqlID; @property?(nonatomic,?retain)?NSString?*sqlText; @property?(nonatomic,?retain)?NSString?*sqlname;@end

再來看看.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]; }//獲取document目錄并返回數據庫目錄 -?(NSString?*)dataFilePath{NSArray?*paths?=?NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,?NSUserDomainMask,?YES);NSString?*documentsDirectory?=?[paths?objectAtIndex:0];NSLog(@"=======%@",documentsDirectory);return?[documentsDirectory?stringByAppendingPathComponent:@"data.db"];//這里很神奇，可以定義成任何類型的文件，也可以不定義成.db文件，任何格式都行，定義成.sb文件都行，達到了很好的數據隱秘性}//創建，打開數據庫 -?(BOOL)openDB?{//獲取數據庫路徑NSString?*path?=?[self?dataFilePath];//文件管理器NSFileManager?*fileManager?=?[NSFileManager?defaultManager];//判斷數據庫是否存在BOOL?find?=?[fileManager?fileExistsAtPath:path];//如果數據庫存在，則用sqlite3_open直接打開（不要擔心，如果數據庫不存在sqlite3_open會自動創建）if?(find)?{NSLog(@"Database?file?have?already?existed.");//打開數據庫，這里的[path?UTF8String]是將NSString轉換為C字符串，因為SQLite3是采用可移植的C(而不是//Objective-C)編寫的，它不知道什么是NSString.if(sqlite3_open([path?UTF8String],?&_database)?!=?SQLITE_OK)?{//如果打開數據庫失敗則關閉數據庫sqlite3_close(self._database);NSLog(@"Error:?open?database?file.");return?NO;}//創建一個新表[self?createTestList:self._database];return?YES;}//如果發現數據庫不存在則利用sqlite3_open創建數據庫（上面已經提到過），與上面相同，路徑要轉換為C字符串if(sqlite3_open([path?UTF8String],?&_database)?==?SQLITE_OK)?{//創建一個新表[self?createTestList:self._database];return?YES;}?else?{//如果創建并打開數據庫失敗則關閉數據庫sqlite3_close(self._database);NSLog(@"Error:?open?database?file.");return?NO;}return?NO; }//創建表 -?(BOOL)?createTestList:(sqlite3*)db?{//這句是大家熟悉的SQL語句char?*sql?=?"create?table?if?not?exists?testTable(ID?INTEGER?PRIMARY?KEY?AUTOINCREMENT,?testID?int,testValue?text,testName?text)";//?testID是列名，int?是數據類型，testValue是列名，text是數據類型，是字符串類型sqlite3_stmt?*statement;//sqlite3_prepare_v2?接口把一條SQL語句解析到statement結構里去.?使用該接口訪問數據庫是當前比較好的的一種方法NSInteger?sqlReturn?=?sqlite3_prepare_v2(_database,?sql,?-1,?&statement,?nil);//第一個參數跟前面一樣，是個sqlite3?*?類型變量，//第二個參數是一個?sql?語句。//第三個參數我寫的是-1，這個參數含義是前面?sql?語句的長度。如果小于0，sqlite會自動計算它的長度（把sql語句當成以\0結尾的字符串）。//第四個參數是sqlite3_stmt?的指針的指針。解析以后的sql語句就放在這個結構里。//第五個參數是錯誤信息提示，一般不用,為nil就可以了。//如果這個函數執行成功（返回值是?SQLITE_OK?且?statement?不為NULL?），那么下面就可以開始插入二進制數據。//如果SQL語句解析出錯的話程序返回if(sqlReturn?!=?SQLITE_OK)?{NSLog(@"Error:?failed?to?prepare?statement:create?test?table");return?NO;}//執行SQL語句int?success?=?sqlite3_step(statement);//釋放sqlite3_stmt?sqlite3_finalize(statement);//執行SQL語句失敗if?(?success?!=?SQLITE_DONE)?{NSLog(@"Error:?failed?to?dehydrate:create?table?test");return?NO;}NSLog(@"Create?table?'testTable'?successed.");return?YES; }//插入數據 -(BOOL)?insertTestList:(sqlTestList?*)insertList?{//先判斷數據庫是否打開if?([self?openDB])?{sqlite3_stmt?*statement;//這個?sql?語句特別之處在于?values?里面有個??號。在sqlite3_prepare函數里，?號表示一個未定的值，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;}//這里的數字1，2，3代表上面的第幾個問號，這里將三個值綁定到三個綁定變量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);//執行插入語句success2?=?sqlite3_step(statement);//釋放statementsqlite3_finalize(statement);//如果插入失敗if?(success2?==?SQLITE_ERROR)?{NSLog(@"Error:?failed?to?insert?into?the?database?with?message.");//關閉數據庫sqlite3_close(_database);return?NO;}//關閉數據庫sqlite3_close(_database);return?YES;}return?NO; }//獲取數據 -?(NSMutableArray*)getTestList{NSMutableArray?*array?=?[NSMutableArray?arrayWithCapacity:10];//判斷數據庫是否打開if?([self?openDB])?{sqlite3_stmt?*statement?=?nil;//sql語句char?*sql?=?"SELECT?testID,?testValue?,testName?FROM?testTable";//從testTable這個表中獲取?testID,?testValue?,testName，若獲取全部的話可以用*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?{//查詢結果集中一條一條的遍歷所有的記錄，這里的數字對應的是列值,注意這里的列值，跟上面sqlite3_bind_text綁定的列值不一樣！一定要分開，不然會crash，只有這一處的列號不同，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];//定義了自動釋放的NSArray，這樣不是個好辦法，會造成內存泄露，建議大家定義局部的數組，再賦給屬性變量。 }//更新數據 -(BOOL)?updateTestList:(sqlTestList?*)updateList{if?([self?openDB])?{sqlite3_stmt?*statement;//這相當一個容器，放轉化OK的sql語句//組織SQL語句char?*sql?=?"update?testTable?set?testValue?=???and?testName?=???WHERE?testID?=??";//將SQL語句放入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;}//這里的數字1，2，3代表第幾個問號。這里只有1個問號，這是一個相對比較簡單的數據庫操作，真正的項目中會遠遠比這個復雜//綁定text類型的數據庫數據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);//執行SQL語句。這里是更新數據庫success?=?sqlite3_step(statement);//釋放statementsqlite3_finalize(statement);//如果執行失敗if?(success?==?SQLITE_ERROR)?{NSLog(@"Error:?failed?to?update?the?database?with?message.");//關閉數據庫sqlite3_close(_database);return?NO;}//執行成功后依然要關閉數據庫sqlite3_close(_database);return?YES;}return?NO; } //刪除數據 -?(BOOL)?deleteTestList:(sqlTestList?*)deletList{if?([self?openDB])?{sqlite3_stmt?*statement;//組織SQL語句static?char?*sql?=?"delete?from?testTable??where?testID?=???and?testValue?=???and?testName?=??";//將SQL語句放入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;}//這里的數字1，2，3代表第幾個問號。這里只有1個問號，這是一個相對比較簡單的數據庫操作，真正的項目中會遠遠比這個復雜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);//執行SQL語句。這里是更新數據庫success?=?sqlite3_step(statement);//釋放statementsqlite3_finalize(statement);//如果執行失敗if?(success?==?SQLITE_ERROR)?{NSLog(@"Error:?failed?to?delete?the?database?with?message.");//關閉數據庫sqlite3_close(_database);return?NO;}//執行成功后依然要關閉數據庫sqlite3_close(_database);return?YES;}return?NO;} //查詢數據 -?(NSMutableArray*)searchTestList:(NSString*)searchString{NSMutableArray?*array?=?[NSMutableArray?arrayWithCapacity:10];//判斷數據庫是否打開if?([self?openDB])?{sqlite3_stmt?*statement?=?nil;//sql語句NSString?*querySQL?=?[NSString?stringWithFormat:@"SELECT?*?from?testTable?where?testName?like?\"%@\"",searchString];const?char?*sql?=?[querySQL?UTF8String]; //????????char?*sql?=?"SELECT?*?FROM?testTable?WHERE?testName?like??";//這里用like代替=可以執行模糊查找，原來是"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);//查詢結果集中一條一條的遍歷所有的記錄，這里的數字對應的是列值。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//剛才.h文件里定義的類在這實現@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

這就是封裝好的類，可以重用哦！

下面是添加數據頁面

這也是一個類，來看.h文件

#import?<UIKit/UIKit.h> #import?"sqlService.h" @interface?operateSqlViewController?:?UIViewController?{UITextField?*idValue;UITextField?*textValue;UITextField?*textName;????int?oprateType;//區分數據插入與更新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

再來看看.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:UIBarButtonItemStyleBorderedtarget:selfaction:@selector(dismiss:)];UIBarButtonItem?*saveButton?=?[[UIBarButtonItem?alloc]initWithTitle:@"保存"style:UIBarButtonItemStyleBorderedtarget:selfaction:@selector(saveValue:)];[[self?navigationItem]?setLeftBarButtonItem:backButton];[[self?navigationItem]?setRightBarButtonItem:saveButton];[backButton?release];[saveButton?release];????if?(oprateType?==?0)?{[self.navigationItem?setTitle:@"數據插入"];}????else?if(oprateType?==?1){[self.navigationItem?setTitle:@"數據更新"];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:@"請輸入ID"?delegate:selfcancelButtonTitle:@"好"?otherButtonTitles:nil];[alert?show];[alert?release];????????return;}????if?(textValue.text.length?==?0)?{UIAlertView?*alert?=?[[UIAlertView?alloc]?initWithTitle:@"提示"?message:@"請輸入電話"?delegate:selfcancelButtonTitle:@"好"?otherButtonTitles:nil];[alert?show];[alert?release];????????return;}????if?(textName.text.length?==?0)?{UIAlertView?*alert?=?[[UIAlertView?alloc]?initWithTitle:@"提示"?message:@"請輸入姓名"?delegate:selfcancelButtonTitle:@"好"?otherButtonTitles:nil];[alert?show];[alert?release];????????return;}????//初始化數據庫sqlService?*sqlSer?=?[[sqlService?alloc]?init];????//數據庫插入if?(oprateType?==?0)?{sqlTestList?*sqlInsert?=?[[sqlTestList?alloc]init];sqlInsert.sqlID?=?[idValue.text?intValue];sqlInsert.sqlText?=?textValue.text;sqlInsert.sqlname?=?textName.text;????????//調用封裝好的數據庫插入函數if?([sqlSer?insertTestList:sqlInsert])?{UIAlertView?*alert?=?[[UIAlertView?alloc]?initWithTitle:@"提示"?message:@"插入數據成功"?delegate:selfcancelButtonTitle:@"好"?otherButtonTitles:nil];[alert?show];[alert?release];}????????else?{UIAlertView?*alert?=?[[UIAlertView?alloc]?initWithTitle:@"提示"?message:@"插入數據失敗"?delegate:selfcancelButtonTitle:@"好"?otherButtonTitles:nil];[alert?show];[alert?release];}[sqlInsert?release];}????//數據庫更新if(oprateType?==?1){sqlTestList?*newValue?=?[[sqlTestList?alloc]init];newValue.sqlID?=?[idValue.text?intValue];newValue.sqlText?=?textValue.text;newValue.sqlname?=?textName.text;????????//調用封裝好的更新數據庫函數if?([sqlSer?updateTestList:newValue])?{UIAlertView?*alert?=?[[UIAlertView?alloc]?initWithTitle:@"提示"?message:@"更新數據成功"?delegate:selfcancelButtonTitle:@"好"?otherButtonTitles:nil];[alert?show];[alert?release];}????????else?{UIAlertView?*alert?=?[[UIAlertView?alloc]?initWithTitle:@"提示"?message:@"更新數據失敗"?delegate:selfcancelButtonTitle:@"好"?otherButtonTitles:nil];[alert?show];[alert?release];}[newValue?release];}}@end

代碼寫的有些啰嗦，不過不難容易看懂，不多解釋了，要在xib文件中添加3個UITextField和ULabel，要記得連線。

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;//搜索欄}@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];//先初始化那個專門用于存數據的類，才調用類獲取數據的方法 }-?(void)viewDidAppear:(BOOL)animated{//在這里寫是為了等待時間縮短一點，數據如果很多的，在這里寫可以讓數據提前加載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];//觸發這個insertValue方法時隱藏鍵盤operateSqlViewController?*operateController?=?[[operateSqlViewController?alloc]?init?];UINavigationController?*theNavController?=?[[UINavigationController?alloc]initWithRootViewController:operateController];//這里如果不初始化一個UINavigationController類的對象來存放operateSqlViewController類的UIViewController，就不會有最上面的導航欄了。operateController.oprateType?=?0;//optrateType為0時為數據插入[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:@"請選擇要更新的項"?delegate:selfcancelButtonTitle:@"好"?otherButtonTitles:nil];[alert?show];[alert?release];return;}NSUInteger?row?=?[indexPath?row];sqlTestList?*sqlList?=?[[sqlTestList?alloc]init];sqlList?=?[listData?objectAtIndex:(row?-?1)];//在這里面獲取點擊的行，因為table的第一行沒顯示數據，所以這里要減1。operateSqlViewController?*operateController?=?[[operateSqlViewController?alloc]?init?];UINavigationController?*theNavController?=?[[UINavigationController?alloc]initWithRootViewController:operateController];operateController.oprateType?=?1;//optrateType為1時為數據更新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:@"請選擇要刪除的項"?delegate:selfcancelButtonTitle:@"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:@"刪除數據成功"?delegate:selfcancelButtonTitle:@"好"?otherButtonTitles:nil];[alert?show];[alert?release];//刪除成功后重新獲取數據更新列表listData?=?[sqlSer?getTestList];[utableView?reloadData];}else?{UIAlertView?*alert?=?[[UIAlertView?alloc]?initWithTitle:@"提示"?message:@"刪除數據失敗"?delegate:selfcancelButtonTitle:@"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:@"請輸入要查詢數據的ID"?delegate:selfcancelButtonTitle:@"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,未查詢到數據，請查看name是否有誤"?delegate:selfcancelButtonTitle:@"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;//從第二行開始，第一行不顯示數據 }-?(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)];//讀取數據的時候也要減一行，從第二行開始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",@"電話",?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;//讓第一行不能點擊}elsereturn?indexPath; }@end

好了，這就是全部了，希望大家盡量封裝自己寫的類，現在寫得多，以后會很輕松。

轉載于:https://my.oschina.net/mickelfeng/blog/271445

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