I connected a SQLite db to my ipad app. where the db has two tables, 1 table which populates the data and other tables save the data given in the app. but the problem is that my Database is not refreshing and saving the data.. for example: if i add new name to the table it doesn’t populate automatically and it is populating only if i add the db file again with different name and also it is not saving the data which i want to save.
Kindly give me your valuable suggestions
please find my code for your reference:
#import <UIKit/UIKit.h>
#import "PersonDatabase.h"
#import "sqlite3.h"
#import <sqlite3.h>
@interface ViewController : UIViewController<UITextViewDelegate>{
PersonDatabase *perDas;
NSString * nameString;
NSString * statusString;
sqlite3 *database;
NSString * empString;
}
@property (retain, nonatomic) IBOutlet UITableView *tableView;
@property (strong, nonatomic) IBOutlet UIButton *signIn;
@property (strong, nonatomic) IBOutlet UIButton *signOut;
@property (strong, nonatomic) IBOutlet UILabel *nameLabel;
@property (strong, nonatomic) IBOutlet NSString * nameString;
@property (strong, nonatomic) IBOutlet NSString * statusString;
-(IBAction)signin:(id)sender;
-(IBAction)signout:(id)sender;
@end
#import "ViewController.h"
#import "PersonInfo.h"
#import "PersonDatabase.h"
@implementation ViewController
@synthesize tableView;
@synthesize signIn;
@synthesize signOut;
@synthesize nameLabel;
@synthesize nameString,statusString;;
- (void)viewDidLoad
{
[super viewDidLoad];
if (perDas == nil) {
perDas = [[PersonDatabase alloc] init];
}
[tableView setDataSource:perDas];
[tableView setDelegate:perDas];
perDas.view = perDas.tableView;
}
-(IBAction)signin:(id)sender{
NSLog(@"%@",perDas.string1);
nameString=[[NSString alloc]initWithString:perDas.string1];
statusString=[[NSString alloc]initWithFormat:@"IN"];
{
NSLog(@"passed");
sqlite3_stmt *statement;
const char *dbpath = [perDas.databasePath UTF8String];
if (sqlite3_open(dbpath, &database) == SQLITE_OK)
{
NSLog(@"pass");
NSString *insertSQL = [NSString stringWithFormat: @"INSERT INTO status (names, staus, signin, singnout) VALUES (\"%@\", \"%@\", datetime(), \"%@\")", nameString, statusString,empString];
NSLog(@"%@",insertSQL);
const char *insert_stmt = [insertSQL UTF8String];
int results= sqlite3_prepare_v2(database, insert_stmt, -1, &statement, NULL);
NSLog(@"%i", results);
if(sqlite3_step(statement) == SQLITE_DONE){
NSLog(@"done");
}else {
printf( "could not prepare statemnt: %s\n", sqlite3_errmsg(database) );
}
sqlite3_finalize(statement);
sqlite3_close(database);
}
}}
-(IBAction)signout:(id)sender{
NSLog(@"%@",perDas.string1);}
- (void)viewDidUnload
{
[self setTableView:nil];
[self setSignIn:nil];
[self setSignOut:nil];
[self setNameLabel:nil];
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return YES;
}
@end
#import <Foundation/Foundation.h>
@interface PersonInfo : NSObject{
int unique;
NSString * nam;
}
@property(nonatomic, assign)int unique;
@property(nonatomic, copy)NSString * nam;
-(id) initWithUniqueId:(int)uniqueId name:(NSString *)name;
@end
#import "PersonInfo.h"
@implementation PersonInfo
@synthesize unique,nam;
-(id) initWithUniqueId:(int)uniqueId name:(NSString *)name{
self=[super init];
if (self) {
self.unique=uniqueId;
self.nam=name;
}
return self;
}
@end
#import <UIKit/UIKit.h>
#import "sqlite3.h"
#import <sqlite3.h>
#import "PersonInfo.h"
@interface PersonDatabase : UITableViewController<UITableViewDataSource>{
NSString *databaseName;
NSString * databasePath;
NSMutableArray *tableOne;
NSString * string1;
NSString * dateString;
NSString * timeString;
sqlite3 *database;
NSString * empString;
}
@property(nonatomic, retain) NSMutableArray *tableOne;
@property(nonatomic, retain) NSString * string1;
@property(nonatomic, retain) NSString * databasePath;
-(void)checkAndCreateDatabase;
-(void)readDataFromDatabase;
@end
#import "PersonDatabase.h"
#import "PersonInfo.h"
#import "ViewController.h"
@implementation PersonDatabase
@synthesize tableOne, string1,databasePath;
#pragma mark - View lifecycle
- (void)viewDidLoad
{
databaseName=@"log.sqlite3";
NSArray *documentPaths= NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString * documentDir = [documentPaths objectAtIndex:0];
databasePath=[documentDir stringByAppendingPathComponent:databaseName];
[self checkAndCreateDatabase];
[self readDataFromDatabase];
[super viewDidLoad];
NSLog(@"a");
// Do any additional setup after loading the view, typically from a nib.
}
#pragma mark - TableView Data Source methods
-(NSInteger) numberOfSectionsInTableView:(UITableView *)tableView{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return [tableOne count]; }
// Row display. Implementers should *always* try to reuse cells by setting each cell's reuseIdentifier and querying for available reusable cells with dequeueReusableCellWithIdentifier:
// Cell gets various attributes set automatically based on table (separators) and data source (accessory views, editing controls)
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell *cell= nil;
cell = [tableView dequeueReusableCellWithIdentifier:@"mycell"];
if (cell == nil) {
cell=[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"mycell"];}
PersonInfo * temp =(PersonInfo *)[self.tableOne objectAtIndex:indexPath.row];
cell.textLabel.text=temp.nam;
return cell;
}
-(void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[tableView deselectRowAtIndexPath:indexPath animated:YES];
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
string1 = cell.textLabel.text;
NSLog(@"%@",string1);
}
-(void)checkAndCreateDatabase{
BOOL success;
NSFileManager *fileManager=[NSFileManager defaultManager];
success=[fileManager fileExistsAtPath:databasePath];
if(success)
return;
NSString *databasePathFromApp = [[[NSBundle mainBundle]resourcePath] stringByAppendingPathComponent:databaseName];
[fileManager copyItemAtPath:databasePathFromApp toPath:databasePath error:nil];
}
-(void)readDataFromDatabase{
tableOne=[[NSMutableArray alloc]init];
if(sqlite3_open([databasePath UTF8String], &database)== SQLITE_OK){
const char *sqlStatement = "SELECT * FROM names";
sqlite3_stmt *compiledStatement;
if(sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, NULL)==SQLITE_OK){
while (sqlite3_step(compiledStatement)==SQLITE_ROW) {
int uniqueId = sqlite3_column_int(compiledStatement, 0);
char *nameChars=(char *)sqlite3_column_text(compiledStatement,1);
NSString *name=[[NSString alloc]initWithUTF8String:nameChars];
PersonInfo *info=[[PersonInfo alloc]initWithUniqueId:uniqueId name:name];
[tableOne addObject:info];
}
}
sqlite3_finalize(compiledStatement);
}
sqlite3_close(database);
}
@end
Thanks in Advance!!!
Following are my DB functions and they are working fine try this..
//////code to save update delete