Working with SQLite in IOS - objective-c

Question

Hello, I am using following code to implement SQLite Database in Application. Friends have you any other easiest way to implement
this, Which work with all the content of SQLite Database.
// .h File of DBManager
#import <Foundation/Foundation.h>
#import <sqlite3.h>
#interface DBOperation : NSObject
{
}
+(void)OpenDatabase:(NSString*)path; //Open the Database
//+(void)finalizeStatements;//Closing and do the final statement at application exits
+(void)checkCreateDB;
//+(int) getLastInsertId;
+(BOOL) executeSQL:(NSString *)sqlTmp;
+(NSMutableArray*) selectData:(NSString *)sql;
#end
//
// DBOperation.m
// Puzzle
//
// Created by hbmac1 on 9/22/09.
// Copyright 2009 __MyCompanyName__. All rights reserved.
//
#import "DBOperation.h"
static sqlite3 *database = nil;
static int conn;
#implementation DBOperation
+(void)checkCreateDB
{
#try {
NSString *dbPath,*databaseName;
databaseName=#"pointtable.sqlite";
NSArray *docPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
NSString *docDir = [docPaths objectAtIndex:0];
dbPath = [docDir stringByAppendingPathComponent:databaseName];
BOOL success;
NSFileManager *fm = [NSFileManager defaultManager];
success=[fm fileExistsAtPath:dbPath];
if(success)
{
[self OpenDatabase:dbPath];
return;
}
NSString *dbPathFromApp=[[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:databaseName];
[fm copyItemAtPath:dbPathFromApp toPath:dbPath error:nil];
[self OpenDatabase:dbPath];
}
#catch (NSException *exception) {
NSLog(#"%#",[exception reason]);
}
}
//Open database
+ (void) OpenDatabase:(NSString*)path
{
#try
{
conn = sqlite3_open([path UTF8String], &database);
if (conn == SQLITE_OK) {
}
else
sqlite3_close(database); //Even though the open call failed, close the database connection to release all the memory.
}
#catch (NSException *e) {
NSLog(#"%#",e);
}
}
+(NSMutableArray*) selectData:(NSString *)sql
{
#try
{
if (conn == SQLITE_OK)
{
sqlite3_stmt *stmt = nil;
if(sqlite3_prepare_v2(database, [sql UTF8String], -1, &stmt, NULL) != SQLITE_OK) {
[NSException raise:#"DatabaseException" format:#"Error while creating statement. '%s'", sqlite3_errmsg(database)];
}
NSMutableArray *obj = [[NSMutableArray alloc]init];
int numResultColumns = 0;
while (sqlite3_step(stmt) == SQLITE_ROW) {
numResultColumns = sqlite3_column_count(stmt);
#autoreleasepool {
NSMutableDictionary *tmpObj = [[NSMutableDictionary alloc]init];
for(int i = 0; i < numResultColumns; i++){
if(sqlite3_column_type(stmt, i) == SQLITE_INTEGER){
const char *name = sqlite3_column_name(stmt, i);
NSString *columnName = [[NSString alloc]initWithCString:name encoding:NSUTF8StringEncoding];
[tmpObj setObject:[NSString stringWithFormat:#"%i",sqlite3_column_int(stmt, i)] forKey:columnName];
} else if (sqlite3_column_type(stmt, i) == SQLITE_FLOAT) {
const char *name = sqlite3_column_name(stmt, i);
NSString *columnName = [[NSString alloc]initWithCString:name encoding:NSUTF8StringEncoding];
[tmpObj setObject:[NSString stringWithFormat:#"%f",sqlite3_column_double(stmt, i)] forKey:columnName];
} else if (sqlite3_column_type(stmt, i) == SQLITE_TEXT) {
const char *name = sqlite3_column_name(stmt, i);
NSString *tmpStr = [NSString stringWithUTF8String:(char *)sqlite3_column_text(stmt, i)];
if ( tmpStr == nil) {
tmpStr = #"";
}
NSString *columnName = [[NSString alloc]initWithCString:name encoding:NSUTF8StringEncoding];
[tmpObj setObject:tmpStr forKey:columnName];
} else if (sqlite3_column_type(stmt, i) == SQLITE_BLOB) {
}
else if (sqlite3_column_type(stmt, i) == SQLITE_NULL) {
const char *name = sqlite3_column_name(stmt, i);
NSString *tmpStr = #"";
NSString *columnName = [[NSString alloc]initWithCString:name encoding:NSUTF8StringEncoding];
[tmpObj setObject:tmpStr forKey:columnName];
}
}
[obj addObject:tmpObj];
}
}
return obj;
} else {
return nil;
}
}
#catch (NSException *exception) {
NSLog(#"%#",[exception reason]);
return nil;
}
}
+(BOOL) executeSQL:(NSString *)sqlTmp {
#try {
if(conn == SQLITE_OK) {
const char *sqlStmt = [sqlTmp cStringUsingEncoding:NSUTF8StringEncoding];
sqlite3_stmt *cmp_sqlStmt1;
int returnValue = sqlite3_prepare_v2(database, sqlStmt, -1, &cmp_sqlStmt1, NULL);
returnValue == SQLITE_OK ? NSLog(#"\n Inserted \n") :NSLog(#"\n Not Inserted \n");
sqlite3_step(cmp_sqlStmt1);
sqlite3_finalize(cmp_sqlStmt1);
if (returnValue == SQLITE_OK)
{
return TRUE;
}
}
return FALSE;
}
#catch (NSException *exception) {
NSLog(#"%#",[exception reason]);
return NO;
}
}
#end

Answer 1

Check FMDB, it is very powerful and a lot easier to work with

Answer 2

(void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. NSString *docsDir; NSArray *dirPaths; dirPaths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES); docsDir=[dirPaths objectAtIndex:0]; databasePath=[[NSString alloc]initWithString:[docsDir stringByAppendingPathComponent:#"eventDb.db"]]; NSFileManager *filemgr=[NSFileManager defaultManager]; const char *dbpath=[databasePath UTF8String]; if(sqlite3_open(dbpath, &eventDb)==SQLITE_OK) { char *errmsg; const char *sql_stmt="CREATE TABLE IF NOT EXISTS EVENT(EVENTID INTEGER PRIMARY KEY AUTOINCREMENT,ENAME TEXT,ETIME TEXT,TIMAGE TEXT)"; if(sqlite3_exec(eventDb,sql_stmt,NULL,NULL,&errmsg)!=SQLITE_OK) { NSLog(#"falied"); } sqlite3_close(eventDb); } else { NSLog(#"failed to open/create database"); }} //insert dirPaths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES); docsDir=[dirPaths objectAtIndex:0]; databasePath=[[NSString alloc]initWithString:[docsDir stringByAppendingPathComponent:#"eventDb.db"]]; sqlite3_stmt *statement; const char *dbpath=[databasePath UTF8String]; if(sqlite3_open(dbpath, &eventDb)==SQLITE_OK) { { { NSString *insertSQL=[NSString stringWithFormat:#" INSERT INTO EVENT(ENAME,ETIME,TIMAGE) VALUES (\"%#\",\"%#\",\"%#\")",_eventLbl.text,time,name]; const char *insert_stmt=[insertSQL UTF8String]; sqlite3_prepare_v2(eventDb,insert_stmt,-1,&statement,NULL); if(sqlite3_step(statement)==SQLITE_DONE) { NSLog(#"added"); } else { NSLog(#"fail to added"); } }}} //select NSString *docsDir; NSArray *dirPaths; dirPaths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES); docsDir=[dirPaths objectAtIndex:0]; databasePath=[[NSString alloc]initWithString:[docsDir stringByAppendingPathComponent:#"eventDb.db"]]; const char *dbpath=[databasePath UTF8String]; sqlite3_stmt *statment; if(sqlite3_open(dbpath,&eventDb)==SQLITE_OK) { NSString *querySQL=[NSString stringWithFormat:#"SELECT ENAME,ETIME,TIMAGE FROM EVENT "]; const char *query_stmt=[querySQL UTF8String]; if(sqlite3_prepare_v2(eventDb,query_stmt,-1,&statment,NULL)==SQLITE_OK) { while(sqlite3_step(statment)==SQLITE_ROW) { NSString ename=[[NSString alloc]initWithUTF8String:(const char)sqlite3_column_text(statment, 0)]; NSString eTIme=[[NSString alloc]initWithUTF8String:(const char)sqlite3_column_text(statment, 1)]; NSString IMAGENAME=[[NSString alloc]initWithUTF8String:(const char)sqlite3_column_text(statment, 2)]; event *g=[[event alloc] init]; g.eventname=ename; g.eventime=eTIme; g.eventImagename=IMAGENAME; [_arr addObject:g] } sqlite3_finalize(statment); } sqlite3_close(eventDb); } //tableview -(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return 1; } -(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return [_tool count]; } -(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *myId=#"myID"; UITableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:myId]; if (cell==nil) { [[NSBundle mainBundle]loadNibNamed:#"royalkitCell" owner:self options:nil]; cell=_toolCell; cell.accessoryType=UITableViewCellAccessoryDisclosureIndicator; } NSString *tname=[_tool objectAtIndex:indexPath.row]; _toolLabel=(UILabel *)[cell viewWithTag:10]; _toolLabel.text=tname; return cell; } Heading